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There are at least one of several drawbacks to the above described classical formulation approach. Firstly, classification of fragrance materials by their characters is subjective and therefore results in inconsistency in the fragrance profile under classical fragrance pyramid construction rules. Secondly, the perceived intensity of the fragrance profile of the conventional perfume compositions, particularly those characters attributable to the more volatile fragrance materials, decreases rapidly over time due to their quick evaporation. Accordingly, conventional perfume compositions will typically change their overall fragrance profile over time. This is a problem because it is desirable to maintain "fragrance profile fidelity" over time. In other words, it is desirable to maintain the same or substantively similar fragrance profile for a commercial fragrance over time, particularly over long periods of time (at least 4 hrs, 6 hrs, or even 8 hours after application). Thirdly, with the classical fragrance pyramid construction, the possible types of fragrance profiles have been somewhat limited. The consequence of using base notes at high levels is that many fragrance dry-downs appear repetitive, boring, non-memorable and uninteresting to consumers. However, if base notes are reduced or excluded then the fragrance intensity weakens over time and does not last for a sufficient duration. Lastly, it is generally accepted that some consumers desire prolonged intensity of select characters, particularly the floral, spicy or aromatic characters derived from the heart notes. Unfortunately, the consequence of using high levels of base notes is that they may impart particularly undesirable characters, such as for example, musky, woody, ambery, warm and sweet, which overpower and dominate the more desirable fragrance characters over time, particular over long periods of time. Thus, the unique challenge remains of selectively extending the more desirable characters attributable from the heart and/or top notes, particularly the heart notes, and even more particularly extending these desirable characters over long periods of time.


Thus, it is an advantage of the present invention to provide new rules for objectively classifying fragrance materials according to their volatility using their their vapor pressures defined at suitable temperature, instead of their characters. The new rules operate irrespective of perfumers performing the classification. In particular, the new rules classify the fragrance materials into low, moderate or high volatile fragrance materials for formulating into fragrance mixtures, particularly ones having a diamond construction. It is a further advantage of the present invention to provide compositions having improved fidelity to the perceived fragrance profile over time. It is yet a further advantage to provide a composition, wherein the character attributable to moderate and high volatile fragrance materials, particularly the moderate volatile fragrance materials, remains significantly consistent from its initial impression to the end. It is yet a further advantage to provide compositions having improved longevity of the perceived fragrance profile, preferably the characters attributable from the moderate or high volatile fragrance materials, particularly the moderate volatile fragrance material. It is yet a further advantage to provide compositions having stable quality of end product (e.g., fragrance profile, visual appearance) substantially comparable to the classical fragrance pyramid three-tiered structure, preferably even after three months storage at 40 °C. It is yet a further advantage to be able to create new to the world fragrance profiles wherein one, or several, well-recognized moderate volatile fragrance material characters, are maintained over time, preferably for long periods of time ( e . g ., greater than 4, 6, or even 8 hours).


The present invention provides a method for imparting, intensifying, or modifying an odour on human skin or human hair, comprising applying to human skin and/or human hair the composition of the present invention. It is preferred that the method is for imparting, intensifying or modifying the longevity of a floral character or aromatic/spicy character on human skin or human hair, wherein the perceived intensity of the floral character or aromatic/spicy character at 1 hr, 2 hrs, 3 hrs or 6 hrs after application is greater than a control composition that does not include the substantially non-odorous fragrance modulator as determined by the panel method as disclosed herein.


At the testing facility, 50 µL samples of the compositions and the controls are applied to glass slides and placed on a hot plate at 32 °C to represent skin temperature for varying durations. It is important that glass slides of samples that are to be later compared are prepared at the same time. The panelists are asked to evaluate the perceived fragrance profile (intensity and/or character) of each glass slide sample at a given time point. Slides are presented coded so that their identity is not known by the panelists. Within a given time point panelists evaluate the slides in a random order and are able to revisit their assessment as they work through the slides at that time point. Their assessments are recorded. In the subsequent analysis, the data for strength and character comparisons are drawn from the independent assessments carried out at a given time point. Only when using the character difference scale below are any 2 products physically directly compared to each other. Panelists are selected from individuals who are either trained to evaluate fragrances according to the scales below or who have experience of fragrance evaluation in the industry. Typically, around 6-10 panellists are used to evaluate a given product and its control.


The panelists are asked to give a score on a scale of 0 to 5 for perceived fragrance intensity according to the odour intensity scale set out in Table 4 herein below. Table 4 - Odour Intensity Scale Score Fragrance Intensity 0 None 1 Very Weak 2 Weak 3 Moderate 4 Strong 5 Very Strong


1 hr
2 hrs
3 hrs
4 hrs
5 hrs
6 hrs
8 hrs
12 hrs

The following test is carried out to demonstrate the improved or enhanced longevity of a fragrance profile of a composition of the present invention vs. a control. In particular, the test measures the effect of a substantially non-odorous fragrance fixative on the evaporation rate of one or more fragrance materials (e.g., 10 PRMs) formulated in a composition. The evaporation response of the fragrance materials to the fixative, as a function of time, is measured through the use of gas chromatography ("GC"). 1. A test composition may comprise a substantially non-odorous fragrance fixative (any one of the fixatives as disclosed in Tables 4(a) and 4(b)) with either: (i) a fragrance material (any one of the moderate volatile fragrance materials as disclosed in Table 2 and high volatile fragrance materials as disclosed in Table 3), or (ii) a blend of fragrance materials from Tables 2 and 3 (as disclosed as Fragrance Example 6 in Table 11). The test compositions also contain high purity ethanol, such as Hayman 100%EP/BP grade, and deionized water. Samples test compositions are provided in Tables 19(a)-19(b). All of the ingredients are admixed until evenly distributed in the test compositions. 2. A control composition to the test composition described in 1 above, without the substantially non-odorous fragrance fixative is made in a similar manner to Step 1, except that the missing substantially non-odorous fixative is replaced by deionized water. Sample control compositions are provided in Tables 19(a)-19(b). 3. An internal standard is needed to correct for variations of the amount of composition dispensed in the evaporation test as well as loss during the GC analysis. The internal standard has a vapor pressure of less than 0.001 Torr (0.000133 kPa) at 25 °C and is soluble in the composition and fragrance material. A suitable non-limiting example of an internal standard is triethyl citrate. The internal standard and fragrance material are admixed until evenly distributed at a level of 90 to 95 parts by weight of fragrance material and the required amount of internal standard to reach 100 parts. This mixture is then use to prepare the sample compositions in Step 1 and 2. Alternatively, the internal standard and test or control composition are admixed until evenly distributed at a level of 99 to 99.75 parts by weight of composition and the required amount of internal standard to reach 100 parts. This resultant solution is used in subsequent steps. 4. A hotplate is set to a temperature of 32 °C. An aluminum container, such as TA Instruments T-Zero ™ pan, is placed on the hotplate. 20 µL of the test or control composition is introduced in the aluminum container using a micropipette. Alternatively, the aluminum container may be filled with the test or control composition to its full capacity. The time at which this takes place is determined to be time zero ( i.e., T = 0). Multiple aluminum containers are prepared and left at the set temperature for pre-determined periods of time, such as for example 30 mins, 1 hr, 2 hrs, 3 hrs, 4 hrs, 5 hrs, 6 hrs, 8 hrs and up to 12 hrs. 5. The aluminum container is removed from the hotplate at the end of the pre-determined time period and transferred by being inserted into a 4 mL glass vial already containing at least 2 mL of highly volatile solvent, such as high purity ethanol or hexane. 6. The glass vial is mixed using a Heidolph multi REAX shaker, or equivalent, for 5 to 10 mins to extract the fragrance materials into the solvent phase. 1.5 mL of the resultant solution is transferred to a 2 mL GC vial. 7. The GC vial is analysed on an Agilent GC system 6890 equipped with an autosampler, or equivalent. A GC column such as a DB-5MS, Rxi-5 SilMS model or equivalent phase, with a length of 30 m, an inner diameter of 0.25 mm and a film thickness of 1 µm is used. The GC parameters are set to the values indicated as follows: Table 5(iii) - GC Parameters Injector temperature: 270 °C Initial gas velocity: 25 to 40 cm/sec (for Helium as the carrier gas) Initial oven temperature: 50 °C Temperature ramp: 8 °C/min Final oven temperature: 310 °C Gas chromatography with flame ionization detection ("FID") or with mass spectrometry ("MS") can be used for the identification and quantification of fragrance material in the compositions. Either detection system can be used in conjunction with GC. The column dimensions as well as GC settings described in this method, such as injector temperature, carrier gas velocity, temperature ramp and final oven temperature can be adjusted to optimize the response of the fragrance material and internal standard being monitored. The detection system settings, such as FID gas flows and temperature or MS parameters, should be optimized by a trained analyst to enable the precise detection and quantification of the analytes of interest. 8. The peak area of the fragrance material and internal standard are recorded. The peak area ratio of the fragrance material and the internal standard is calculated at each time point for each sample composition. The % of non-evaporated fragrance material remaining from T = 0 is calculated at each time point for each sample composition. The % fragrance material remaining in each composition is plotted to give an evaporation profile over time. This is done for both the test and control compositions. Significance is determined by comparison of the evaporation profile for the same fragrance material or same fragrance mixture in the test and control compositions.


The following test is carried out to demonstrate the character retention over time of a fragrance composition of the present invention vs. a control. It is necessary for the test and control samples to be run at approximately the same time to ensure that ambient conditions are the same. The test measures the presence of one or more fragrance materials in the headspace formed in a sealed vial by the test composition, after set evaporation times. The fragrance profile in the headspace is measured at specific time points through the use of headspace ("HS") gas chromatography ("GC"). 1. The test and control compositions as described in the Example section are used for the evaluation. 2. Capillaries of about 2 cm to 3.5 cm, with one sealed end are cut from a Sigma Aldrich "Stuart ™ melting point tube" product code Z673269, or equivalent. A suitable fixed volume chosen between 50 and 200 µL of the composition is pipetted into the well of a VWR Tissue Culture 96 F well plate, or equivalent. The sealed end of the glass capillary is dipped into the filled well and left for at least 15 secs to wet the surface of the glass. Care must be taken not to contact the glass capillary with the sides of the well by maintaining it straight and approximately in the center of the well. 3. The glass capillary is then removed from the well and inverted or transferred onto a stable surface or into a holder and allowed to evaporate at ambient conditions for a set period of time. A windshield may be used to reduce high air turbulence. 4. The glass capillary is then introduced into an empty 20 mL HS vial, which is immediately closed with a PTFE cap. The time at which this takes place is determined to be time T = initial ( i.e., T = 10 mins). 5. Multiple glass capillaries are prepared in the same way and left to evaporate at ambient temperature for pre-determined periods of time, such as for example 10, 15, 30 mins, 1 hr, 2 hrs, 3 hrs, 4 hrs, 5 hrs, and up to 6 hrs, before being introduced to the headspace vial and sealed. 6. The HS vial is then analysed on an Agilent GC system 6890 equipped with a Gerstel MPS 2 autosampler, or equivalent, capable of performing SPME injections. A SPME fiber assembly DVB/CAR/PDMS (50/30 µm, 1 cm length) is required. A GC column such as a DB-5MS, ZB-5MSi models, or equivalent phase, with a length of 30 m, an inner diameter of 0.25 mm and a film thickness of 1 µm is used. 7. The SPME HS parameters are set to the values indicated as follows: Table 5(iv) - SPME Parameters Incubation chamber temperature: 40 °C Incubation time: 20 mins Agitation of sample 250 RPM Extraction time 5 mins Desorption time 2 mins 8. The GC parameters are set to the values indicated as follows: Table 5(v) - GC Parameters Injector temperature: 270 °C Initial gas velocity: 20 to 40 cm/sec (for Helium as the carrier gas) Initial oven temperature: 45°C with 2 mins Hold Time Temperature ramp 1: 30 °C/min Temperature 1: 80 °C Temperature ramp 2: 8 °C/min Final temperature: 300 °C Gas chromatography with flame ionization detection ("FID") or with mass spectrometry ("MS") can be used for the identification and quantification of fragrance material in the compositions. Either detection system can be used in conjunction with GC. The column dimensions as well as GC settings described in this method, such as injector temperature, carrier gas velocity, temperature ramp and final oven temperature can be adjusted to optimize the response of the fragrance material being monitored. The detection system settings, such as FID gas flows and temperature or MS parameters, should be optimized by a trained analyst to enable the precise detection and identification of the analytes of interest. 9. A qualitative assessment of the chromatograms obtained is performed by comparing the peak height of the fragrance materials and overall chromatogram at time T = 10 mins to other time points. A dotted line is drawn around an estimated retention time where fragrance materials with a vapour pressure of 0.001 Torr or less (0.000133 kPa or less) elute during the analysis. The difference between the peaks present at each measured time point for the test and control compositions provides evidence of the retention of the character of the fragrance over time. 10. This test set-up is designed to enable the collection of the headspace in a manner that does not saturate the SPME fiber. If the fiber is saturated it does not provide an accurate analysis of the headspace composition. Therefore the quantity of liquid and the evaporation surface area are very different from those in the olfactive evaluation of the same samples. For this reason it is not possible to compare directly the evaporation time frames used in the 2 experiments. It is expected that the evaporation profile is much faster in this headspace experiments compared to the olfactive evaluations.


Compositions disclosed in Tables 18(a)-18(d), 20, 21, and 22(a)-22(d) are applied to glass slides in accordance with the protocol described in the Method Section and a panel of 6-10 experienced panelists evaluate the perceived fragrance profile at initial time 0, then at various time points, typically 1 hour, 2 hours, 3 hours, 4 hours and 6 hours post application. Panelists are asked to score the compositions for the longevity and/or fidelity of the fragrance profile on a scale of 0 to 5, wherein 0 represents a no fragrance is detected and 5 represents a very strong fragrance intensity is detected. The results of the panelists are then averaged and discussed below.

6-10; 1 hour; 2 hours; 3 hours; 4 hours; 6 hours; 0 to 5


Figure 2 shows the fragrance intensity profile of Composition A9 (as disclosed in Table 22(c)) as evaluated by 10 panelists, which comprises the substantially non-odorous fragrance fixative Bis-methoxy PEG-13 PEG-438/PPG-110 SMDI Copolymer ( i.e ., Expert Gel ® 56) and the single fragrance material Indocolore. Addition of the substantially non-odorous fragrance fixative (Expert Gel ® 56) maintains the intensity of the fragrance material for up to at least 6 hours whilst the control, Composition B9, in the absence of the substantially non-odorous fragrance fixative, drops in fragrance intensity profile much more over this time. The substantially non-odorous fragrance fixative acts to maintain the continued initial evaporation over time of the fragrance material. Statistical analysis using the Tukey correction for multiple comparisons confirms the statistically significant difference at 1, 3 and 6 hours (p < 0.0001) at 95% significance level ( i.e. , p < 0.05) at all these time points.


Figure 3 shows the fragrance intensity profile of Composition C9 (as disclosed in Table 22(c)) as evaluated by 9 panelists, which comprises the substantially non-odorous fragrance fixative propyl {4-[2-(diethylamino)-2-oxoethoxy]-3-methoxyphenyl}acetate ( i.e., Kolliphor ® EL) and the single fragrance material Dimethyl Benzyl Carbinol. Addition of the substantially non-odorous fragrance fixative (Kolliphor ® EL) maintains the intensity of the fragrance material for up to at least 6 hours whilst the control, Composition D9, in the absence of the substantially non-odorous fragrance fixative, drops in fragrance intensity profile much more over this time. The substantially non-odorous fragrance fixative acts to maintain the reduced rate of evaporation over time of the fragrance material. Statistical analysis using the Tukey correction for multiple comparisons confirms the statistically significant difference at 1 hour (p < 0.0001), 3 hours (p = 0.0265) and 6 hours (p = 0.0388) at 95% significance level ( i.e., p < 0.05) at all these time points.


Figure 4 shows the fragrance intensity profile of Composition E9 (as disclosed in Table 22(c)) as evaluated by 9 panelists, which comprises the substantially non-odorous fragrance fixative propyl {4-[2-(diethylamino)-2-oxoethoxy]-3-methoxyphenyl}acetate ( i.e., Kolliphor ® EL) and the single fragrance material Eugenol. Addition of the substantially non-odorous fragrance fixative (Kolliphor ® EL) maintains the intensity of the fragrance material for up to at least 6 hours whilst the control, Composition F9, in the absence of the substantially non-odorous fragrance fixative, drops in fragrance intensity profile much more over this time. The substantially non-odorous fragrance fixative acts to supress the initial display of Eugenol and then maintains that continued initial evaporation over time. Statistical analysis using the Tukey correction for multiple comparisons confirms the statistically significant difference at 0 hours (p = 0.0025), 1 hour (p < 0.0001), 3 hours (p < 0.0001) and 6 hours (p < 0.0001) at 95% significance level ( i.e., p < 0.05) at all time points.


Figure 5 shows the fragrance intensity profile of Composition G9 (as disclosed in Table 22(c)) as evaluated by 9 panelists, which comprises the substantially non-odorous fragrance fixative propyl {4-[2-(diethylamino)-2-oxoethoxy]-3-methoxyphenyl}acetate ( i.e., Kolliphor ® EL) and the single fragrance material Phenethyl alcohol (PEA). Addition of the substantially non-odorous fragrance fixative (Kolliphor ® EL) maintains the intensity of the fragrance material from 1 hour to 3 hours whilst the control, Composition H9, in the absence of the substantially non-odorous fragrance fixative, drops in fragrance intensity profile over this time. The substantially non-odorous fragrance fixative acts to maintain the reduced rate of evaporation over time of the fragrance material. Statistical analysis using the Tukey correction for multiple comparisons confirms the statistically significant difference at 1 hour (p < 0.0001) at 95% significance level ( i.e., p < 0.05) and at 3 hours (p = 0.0876) at 90% significance level ( i.e., p < 0.1).


Panelists are asked to score the compositions for the intensity of the fragrance on a scale of 0 to 5, wherein 0 represents a no fragrance intensity is detected and 5 represents a very strong fragrance intensity is detected. The results of the panel test are then averaged. The results show the effect of the substantially non-odorous fragrance fixative and diamond constructed fragrance materials for any one of the inventive Compositions A1, A2, A3, A4, A5, D1, D2, D4, G1, G2, G4, J1, J2, J4, M1, and M2 on fragrance profile longevity versus control Compositions C1, C2, C3, C4, C5, F1, F2, F4, I1, I2, I4, L1, L2, L4, O1, and O2 in the absence of the substantially non-odorous fixative. Alternatively, the results show the effect of the substantially non-odorous fragrance fixative and diamond constructed fragrance materials for any one of the inventive Compositions A1, A2, A3, A4, A5, D1, D2, D4, G1, G2, G4, J1, J2, J4, M1, and M2 on fragrance profile longevity versus traditional Compositions B1, B2, B3, B4, B5, E1, E2, E4, H1, H2, H4, K1, K2, K4, N1, and N2 in the presence of the substantially non-odorous fragrance fixative. Fragrance profile longevity, particularly intensity of the characters attributable to the volatile fragrance materials are maintained for up to at least 6 hours in the presence of the substantially non-odorous fragrance fixative whilst it drops in the absence of the substantially non-odorous fragrance fixative.


Figure 6 provides the fragrance intensity profile of Composition A4 (as disclosed in Table 18(d)), which comprises the substantially non-odorous fragrance fixative PPG-20 Methyl Glucose Ether ( i.e., Glucam ™ P-20) and the Diamond Floral Magnifica Fragrance Example 4b. Addition of the substantially non-odorous fragrance fixative Glucam ™ P-20 maintains the intensity of the fragrance material for up to 6 hours. As compared to the control Composition C4, in the absence of the substantially non-odorous fragrance fixative Glucam ™ P-20, and comprising the Traditional Floral Magnifica Fragrance Example 4a drops in fragrance intensity over the 6 hours.


Figure 7 provides the fragrance intensity profile of Composition A4 (as disclosed in Table 18(d)), which comprises the substantially non-odorous fragrance fixative PPG-20 Methyl Glucose Ether ( i.e. , Glucam ™ P-20) and the Diamond Muguesia Magnifica Fragrance Example 5b. Addition of the substantially non-odorous fragrance fixative Glucam ™ P-20 maintains the intensity of the fragrance material for up to 6 hours. As compared to the control Composition C4, in the absence of the substantially non-odorous fragrance fixative Glucam ™ P-20, and comprising the Traditional Muguesia Magnifica Fragrance Example 5a drops in fragrance intensity over the 6 hours.


Figure 8 provides the fragrance intensity profile of Composition A2 (as disclosed in Table 18(b)), which comprises 15 wt% substantially non-odorous fragrance fixative Diisobutyl Adipate and 7 wt% Diamond Floral Magnifica Fragrance Example 4b. Addition of the substantially non-odorous fragrance fixative Diisobutyl Adipate maintains the intensity of the fragrance material for up to 6 hours. As compared to the control Composition C2, in the absence of the substantially non-odorous fragrance fixative Diisobutyl Adipate, and comprising 7 wt% Traditional Floral Magnifica Fragrance Example 4a drops in fragrance intensity over the 6 hours.


Figure 9 provides the fragrance intensity profile of Composition A2 (as disclosed in Table 18(b)), which comprises 15 wt% substantially non-odorous fragrance fixative Diisobutyl Adipate and 7 wt% Diamond Muguesia Magnifica Fragrance Example 5b. Addition of the substantially non-odorous fragrance fixative Diisobutyl Adipate maintains the intensity of the fragrance material for up to 6 hours. As compared to the control Composition C2, in the absence of the substantially non-odorous fragrance fixative Diisobutyl Adipate, and comprising 7 wt% Traditional Muguesia Magnifica Fragrance Example 5a drops in fragrance intensity over the 6 hours.


Without wishing to be bound by theory, it is believed that the substantially non-odorous fragrance fixative acts to maintain the continued evaporation over time of the fragrance materials, particular the volatile fragrance materials. The effects of the improved fragrance profile longevity of the present invention are noticeable at, any one of, 1, 3 and 6 hours post application.


The test demonstrates the character retention over time of a fragrance composition. The results show the effect of the substantially non-odorous fragrance fixative and fragrance materials in a diamond construction for any one of the inventive Compositions A1, A2, A3, A4, A5, D1, D2, D4, G1, G2, G4, J1, J2, J4, M1, and M2 on fragrance profile versus control Compositions C1, C2, C3, C4, C5, F1, F2, F4, I1, I2, I4, L1, L2, L4, O1, and O2 in the absence of the substantially non-odorous fragrance fixative. Alternatively, results show the effect of the substantially non-odorous fragrance fixative and fragrance materials in a diamond construction for any one of the inventive Compositions A1, A2, A3, A4, A5, D1, D2, D4, G1, G2, G4, J1, J2, J4, M1, and M2 on fragrance profile longevity versus traditional Compositions B1, B2, B3, B4, B5, E1, E2, E4, H1, H2, H4, K1, K2, K4, N1, and N2 in the presence of the substantially non-odorous fragrance fixative. Fragrance profile fidelity, particularly of floral characters attributable to the volatile fragrance materials are maintained for up to at least 1 hour in the presence of the substantially non-odorous fragrance fixative whilst it drops in the absence of the substantially non-odorous fragrance fixative.


The composition according to any one of the preceding claims, wherein the composition maintains the perceived fragrance profile, particularly the characters attributable to the moderate volatile fragrance material and/or high volatile fragrance material, to remain substantively unchanged from application up to 2 hrs, 3 hrs, 4 hrs, 5 hrs, 6 hrs or 8 hrs after application vs. a control composition that does not include a diamond construction fragrance formulation and the substantially non-odorous fragrance fixative, as determined according to the Odour Test as described herein under Test Method 2: Olfactory Tests.

2 hrs; 3 hrs; 4 hrs; 5 hrs; 6 hrs; 8 hrs


The method according to claim 19, wherein the method is for imparting, intensifying or modifying the longevity of a floral character on human skin or human hair, wherein the perceived intensity of the floral character at 1 hr, 2 hrs, 3 hrs or 6 hrs after application is greater than a control composition that does not include the substantially non-odorous fragrance fixative as determined by the panel method as disclosed herein under Test Method 2: Olfactory Tests, and wherein the floral character is selected from the group consisting of lavender-type note, a rose-type note, a lily of the valley-type note, a muguet-type note, a jasmine-type note, a magnolia-type note, a cyclamen-type note, a hyacinth-type note, a lilac-type note, an orange blossom-type note, a cherry blossom-type note, a peony-type note, a lotus-type note, a linden blossom-type note, an osmanthus-type note, a lilac-type note, a heliotrope-type note, a violet-type note, an orris-type note, a tiare-type note, and a patchouli-type note.


1 hr; 2 hrs; 3 hrs; 4 hrs; 5 hrs; 6 hrs; 50/30

1. The test and control compositions as described in the Example section are used for the evaluation. 2. Capillaries of about 2 cm to 3.5 cm, with one sealed end are cut from a Sigma Aldrich “Stuart™ melting point tube” product code Z673269, or equivalent. A suitable fixed volume chosen between 50 and 200 μL of the composition is pipetted into the well of a VWR Tissue Culture 96 F well plate, or equivalent. The sealed end of the glass capillary is dipped into the filled well and left for at least 15 secs to wet the surface of the glass. Care must be taken not to contact the glass capillary with the sides of the well by maintaining it straight and approximately in the center of the well. 3. The glass capillary is then removed from the well and inverted or transferred onto a stable surface or into a holder and allowed to evaporate at ambient conditions for a set period of time. A windshield may be used to reduce high air turbulence. 4. The glass capillary is then introduced into an empty 20 mL HS vial, which is immediately closed with a PTFE cap. The time at which this takes place is determined to be time T=initial (i.e., T=10 mins) 5. Multiple glass capillaries are prepared in the same way and left to evaporate at ambient temperature for pre-determined periods of time, such as for example 10, 15, 30 mins, 1 hr, 2 hrs, 3 hrs, 4 hrs, 5 hrs, and up to 6 hrs, before being introduced to the headspace vial and sealed. 6. The HS vial is then analysed on an Agilent GC system 6890 equipped with a Gerstel MPS 2 autosampler, or equivalent, capable of performing SPME injections. A SPME fiber assembly DVB/CAR/PDMS (50/30 μm, 1 cm length) is required. A GC column such as a DB-5MS, ZB-SMSi models, or equivalent phase, with a length of 30 m, an inner diameter of 0.25 mm and a film thickness of 1 μm is used. 7. The SPME HS parameters are set to the values indicated as follows:


5. Multiple glass capillaries are prepared in the same way and left to evaporate at ambient temperature for pre-determined periods of time, such as for example 10, 15, 30 mins, 1 hr, 2 hrs, 3 hrs, 4 hrs, 5 hrs, and up to 6 hrs, before being introduced to the headspace vial and sealed.


1. The test and control compositions as described in the Example section are used for the evaluation. 2. Capillaries of about 2 cm to 3.5 cm, with one sealed end are cut from a Sigma Aldrich “Stuart™ melting point tube” product code Z673269, or equivalent. A suitable fixed volume chosen between 50 and 200 μL of the composition is pipetted into the well of a VWR Tissue Culture 96 F well plate, or equivalent. The sealed end of the glass capillary is dipped into the filled well and left for at least 15 secs to wet the surface of the glass. Care must be taken not to contact the glass capillary with the sides of the well by maintaining it straight and approximately in the center of the well. 3. The glass capillary is then removed from the well and inverted or transferred onto a stable surface or into a holder and allowed to evaporate at ambient conditions for a set period of time. A windshield may be used to reduce high air turbulence. 4. The glass capillary is then introduced into an empty 20 mL HS vial, which is immediately closed with a PTFE cap. The time at which this takes place is determined to be time T=initial (i.e., T=10 mins). 5. Multiple glass capillaries are prepared in the same way and left to evaporate at ambient temperature for pre-determined periods of time, such as for example 10, 15, 30 mins, 1 hr, 2 hrs, 3 hrs, 4 hrs, 5 hrs, and up to 6 hrs, before being introduced to the headspace vial and sealed. 6. The HS vial is then analysed on an Agilent GC system 6890 equipped with a Gerstel MPS 2 autosampler, or equivalent, capable of performing SPME injections. A SPME fiber assembly DVB/CAR/PDMS (50/30 μm, 1 cm length) is required. A GC column such as a DB-5MS, ZB-5MSi models, or equivalent phase, with a length of 30 m, an inner diameter of 0.25 mm and a film thickness of 1 μm is used. 7. The SPME HS parameters are set to the values indicated as follows:


I. Polymer Assisted Delivery (PAD): This perfume delivery technology uses polymeric materials to deliver perfume materials. Classical coacervation, water soluble or partly soluble to insoluble charged or neutral polymers, liquid crystals, hot melts, hydrogels, perfumed plastics, microcapsules, nano- and micro-latexes, polymeric film formers, and polymeric absorbents, polymeric adsorbents, etc. are some examples. PAD includes but is not limited to: a.) Matrix Systems: The fragrance is dissolved or dispersed in a polymer matrix or particle. Perfumes, for example, may be 1) dispersed into the polymer prior to formulating into the product or 2) added separately from the polymer during or after formulation of the product. Diffusion of perfume from the polymer is a common trigger that allows or increases the rate of perfume release from a polymeric matrix system that is deposited or applied to the desired surface (situs), although many other triggers are know that may control perfume release. Absorption and/or adsorption into or onto polymeric particles, films, solutions, and the like are aspects of this technology. Nano- or micro-particles composed of organic materials (e.g., latexes) are examples. Suitable particles include a wide range of materials including, but not limited to polyacetal, polyacrylate, polyacrylic, polyacrylonitrile, polyamide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polychloroprene, poly ethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polychloroprene, polyhydroxyalkanoate, polyketone, polyester, polyethylene, polyetherimide, polyethersulfone, polyethylenechlorinates, polyimide, polyisoprene, polylactic acid, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polypropylene, polystyrene, polysulfone, polyvinyl acetate, polyvinyl chloride, as well as polymers or copolymers based on acrylonitrile-butadiene, cellulose acetate, ethylene-vinyl acetate, ethylene vinyl alcohol, styrene-butadiene, vinyl acetate-ethylene, and mixtures thereof. “Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccharides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Application 2004/0110648 A1 and U.S. Pat. No. 6,531,444. Silicones are also examples of polymers that may be used as PDT, and can provide perfume benefits in a manner similar to the polymer-assisted delivery “matrix system”. Such a PDT is referred to as silicone-assisted delivery (SAD). One may pre-load silicones with perfume, or use them as an equilibrium system as described for PAD. Suitable silicones as well as making same may be found in USPA 20050143282A1. Functionalized silicones may also be used as described in USPA 2006/003913 A1. Examples of silicones include polydimethylsiloxane and polyalkyldimethylsiloxanes. Other examples include those with amine functionality, which may be used to provide benefits associated with amine-assisted delivery (AAD) and/or polymer-assisted delivery (PAD) and/or amine-reaction products (ARP). Other such examples may be found in USPA 2005/0003980 A1. b.) Reservoir Systems: Reservoir systems are also known as a core-shell type technology, or one in which the fragrance is surrounded by a perfume release controlling membrane, which may serve as a protective shell. The material inside the microcapsule is referred to as the core, internal phase, or fill, whereas the wall is sometimes called a shell, coating, or membrane. Microparticles or pressure sensitive capsules or microcapsules are examples of this technology. Microcapsules of the current invention are formed by a variety of procedures that include, but are not limited to, coating, extrusion, spray-drying, interfacial, in-situ and matrix polymerization. The possible shell materials vary widely in their stability toward water. Among the most stable are polyoxymethyleneurea (PMU)-based materials, which may hold certain PRMs for even long periods of time in aqueous solution (or product). Such systems include but are not limited to urea-formaldehyde and/or melamine-formaldehyde. Gelatin-based microcapsules may be prepared so that they dissolve quickly or slowly in water, depending for example on the degree of cross-linking. Many other capsule wall materials are available and vary in the degree of perfume diffusion stability observed. Without wishing to be bound by theory, the rate of release of perfume from a capsule, for example, once deposited on a surface is typically in reverse order of in-product perfume diffusion stability. As such, urea-formaldehyde and melamine-formaldehyde microcapsules for example, typically require a release mechanism other than, or in addition to, diffusion for release, such as mechanical force (e.g., friction, pressure, shear stress) that serves to break the capsule and increase the rate of perfume (fragrance) release. Other triggers include melting, dissolution, hydrolysis or other chemical reaction, electromagnetic radiation, and the like. Suitable capsule wall materials include, in addition to aminoplasts, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol, polysaccharides and modified polysaccharides, gel forming proteins, modified celluloses such as carboxymethylcelluloses and hydroxyethylcelluloses, polyacrylates, polyureas, polyurethanes and mixtures thereof. The capsules may be further coated with an additional coating that can improve the deposition and/or retention of the capsule on the desired surface. Suitable coating materials include a cationic polymer selected from the group consisting of selected from the group consisting of poly saccharides, cationically modified starch, cationically modified guar, polysiloxanes, poly diallyl dimethyl ammonium halides, copolymers of poly diallyl dimethyl ammonium chloride and vinyl pyrrolidone, acrylamides, imidazoles, imidazolinium halides, imidazolium halides, poly vinyl amine, copolymers of poly vinyl amine and N-vinyl formamide to the surface of the capsule to form a cationically coated polymer encapsulated material. Typical capsules have a diameter of 1 micron to 500 microns. The use of pre-loaded microcapsules requires the proper ratio of in-product stability and in-use and/or on-surface (on-situs) release, as well as proper selection of PRMs. Microcapsules that are based on urea-formaldehyde and/or melamine-formaldehyde are relatively stable, especially in near neutral aqueous-based solutions. These materials may require a friction trigger which may not be applicable to all product applications. Other microcapsule materials (e.g., gelatin) may be unstable in aqueous-based products and may even provide reduced benefit (versus free perfume control) when in-product aged.


a.) Matrix Systems: The fragrance is dissolved or dispersed in a polymer matrix or particle. Perfumes, for example, may be 1) dispersed into the polymer prior to formulating into the product or 2) added separately from the polymer during or after formulation of the product. Diffusion of perfume from the polymer is a common trigger that allows or increases the rate of perfume release from a polymeric matrix system that is deposited or applied to the desired surface (situs), although many other triggers are know that may control perfume release. Absorption and/or adsorption into or onto polymeric particles, films, solutions, and the like are aspects of this technology. Nano- or micro-particles composed of organic materials (e.g., latexes) are examples. Suitable particles include a wide range of materials including, but not limited to polyacetal, polyacrylate, polyacrylic, polyacrylonitrile, polyamide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polychloroprene, poly ethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polychloroprene, polyhydroxyalkanoate, polyketone, polyester, polyethylene, polyetherimide, polyethersulfone, polyethylenechlorinates, polyimide, polyisoprene, polylactic acid, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polypropylene, polystyrene, polysulfone, polyvinyl acetate, polyvinyl chloride, as well as polymers or copolymers based on acrylonitrile-butadiene, cellulose acetate, ethylene-vinyl acetate, ethylene vinyl alcohol, styrene-butadiene, vinyl acetate-ethylene, and mixtures thereof. “Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccharides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Application 2004/0110648 A1 and U.S. Pat. No. 6,531,444. Silicones are also examples of polymers that may be used as PDT, and can provide perfume benefits in a manner similar to the polymer-assisted delivery “matrix system”. Such a PDT is referred to as silicone-assisted delivery (SAD). One may pre-load silicones with perfume, or use them as an equilibrium system as described for PAD. Suitable silicones as well as making same may be found in USPA 20050143282A1. Functionalized silicones may also be used as described in USPA 2006/003913 A1. Examples of silicones include polydimethylsiloxane and polyalkyldimethylsiloxanes. Other examples include those with amine functionality, which may be used to provide benefits associated with amine-assisted delivery (AAD) and/or polymer-assisted delivery (PAD) and/or amine-reaction products (ARP). Other such examples may be found in USPA 2005/0003980 A1.


“Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccharides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Application 2004/0110648 A1 and U.S. Pat. No. 6,531,444.


a.) Matrix Systems: The fragrance is dissolved or dispersed in a polymer matrix or particle. Perfumes, for example, may be 1) dispersed into the polymer prior to formulating into the product or 2) added separately from the polymer during or after formulation of the product. Diffusion of perfume from the polymer is a common trigger that allows or increases the rate of perfume release from a polymeric matrix system that is deposited or applied to the desired surface (situs), although many other triggers are know that may control perfume release. Absorption and/or adsorption into or onto polymeric particles, films, solutions, and the like are aspects of this technology. Nano- or micro-particles composed of organic materials (e.g., latexes) are examples. Suitable particles include a wide range of materials including, but not limited to polyacetal, polyacrylate, polyacrylic, polyacrylonitrile, polyamide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polychloroprene, poly ethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polychloroprene, polyhydroxyalkanoate, polyketone, polyester, polyethylene, polyetherimide, polyethersulfone, polyethylenechlorinates, polyimide, polyisoprene, polylactic acid, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polypropylene, polystyrene, polysulfone, polyvinyl acetate, polyvinyl chloride, as well as polymers or copolymers based on acrylonitrile-butadiene, cellulose acetate, ethylene-vinyl acetate, ethylene vinyl alcohol, styrene-butadiene, vinyl acetate-ethylene, and mixtures thereof. “Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccharides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Application 2004/0110648 A1 and U.S. Pat. No. 6,531,444. Silicones are also examples of polymers that may be used as PDT, and can provide perfume benefits in a manner similar to the polymer-assisted delivery “matrix system”. Such a PDT is referred to as silicone-assisted delivery (SAD). One may pre-load silicones with perfume, or use them as an equilibrium system as described for PAD. Suitable silicones as well as making same may be found in USPA 20050143282A1. Functionalized silicones may also be used as described in USPA 2006/003913 A1. Examples of silicones include polydimethylsiloxane and polyalkyldimethylsiloxanes. Other examples include those with amine functionality, which may be used to provide benefits associated with amine-assisted delivery (AAD) and/or polymer-assisted delivery (PAD) and/or amine-reaction products (ARP). Other such examples may be found in USPA 2005/0003980 A1. b.) Reservoir Systems: Reservoir systems are also known as a core-shell type technology, or one in which the fragrance is surrounded by a perfume release controlling membrane, which may serve as a protective shell. The material inside the microcapsule is referred to as the core, internal phase, or fill, whereas the wall is sometimes called a shell, coating, or membrane. Microparticles or pressure sensitive capsules or microcapsules are examples of this technology. Microcapsules of the current invention are formed by a variety of procedures that include, but are not limited to, coating, extrusion, spray-drying, interfacial, in-situ and matrix polymerization. The possible shell materials vary widely in their stability toward water. Among the most stable are polyoxymethyleneurea (PMU)-based materials, which may hold certain PRMs for even long periods of time in aqueous solution (or product). Such systems include but are not limited to urea-formaldehyde and/or melamine-formaldehyde. Gelatin-based microcapsules may be prepared so that they dissolve quickly or slowly in water, depending for example on the degree of cross-linking. Many other capsule wall materials are available and vary in the degree of perfume diffusion stability observed. Without wishing to be bound by theory, the rate of release of perfume from a capsule, for example, once deposited on a surface is typically in reverse order of in-product perfume diffusion stability. As such, urea-formaldehyde and melamine-formaldehyde microcapsules for example, typically require a release mechanism other than, or in addition to, diffusion for release, such as mechanical force (e.g., friction, pressure, shear stress) that serves to break the capsule and increase the rate of perfume (fragrance) release. Other triggers include melting, dissolution, hydrolysis or other chemical reaction, electromagnetic radiation, and the like. Suitable capsule wall materials include, in addition to aminoplasts, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol, polysaccharides and modified polysaccharides, gel forming proteins, modified celluloses such as carboxymethylcelluloses and hydroxyethylcelluloses, polyacrylates, polyureas, polyurethanes and mixtures thereof. The capsules may be further coated with an additional coating that can improve the deposition and/or retention of the capsule on the desired surface. Suitable coating materials include a cationic polymer selected from the group consisting of selected from the group consisting of polysaccharides, cationically modified starch, cationically modified guar, polysiloxanes, poly diallyl dimethyl ammonium halides, copolymers of poly diallyl dimethyl ammonium chloride and vinyl pyrrolidone, acrylamides, imidazoles, imidazolinium halides, imidazolium halides, poly vinyl amine, copolymers of poly vinyl amine and N-vinyl formamide to the surface of the capsule to form a cationically coated polymer encapsulated material. Typical capsules have a diameter of 1 micron to 500 microns. The use of pre-loaded microcapsules requires the proper ratio of in-product stability and in-use and/or on-surface (on-situs) release, as well as proper selection of PRMs. Microcapsules that are based on urea-formaldehyde and/or melamine-formaldehyde are relatively stable, especially in near neutral aqueous-based solutions. These materials may require a friction trigger which may not be applicable to all product applications. Other microcapsule materials (e.g., gelatin) may be unstable in aqueous-based products and may even provide reduced benefit (versus free perfume control) when in-product aged. II. Molecule-Assisted Delivery (MAD):


a.) Matrix Systems: The fragrance is dissolved or dispersed in a polymer matrix or particle. Perfumes, for example, may be 1) dispersed into the polymer prior to formulating into the product or 2) added separately from the polymer during or after formulation of the product. Diffusion of perfume from the polymer is a common trigger that allows or increases the rate of perfume release from a polymeric matrix system that is deposited or applied to the desired surface (situs), although many other triggers are know that may control perfume release. Absorption and/or adsorption into or onto polymeric particles, films, solutions, and the like are aspects of this technology. Nano- or micro-particles composed of organic materials (e.g., latexes) are examples. Suitable particles include a wide range of materials including, but not limited to polyacetal, polyacrylate, polyacrylic, polyacrylonitrile, polyamide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polychloroprene, poly ethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polychloroprene, polyhydroxyalkanoate, polyketone, polyester, polyethylene, polyetherimide, polyethersulfone, polyethylenechlorinates, polyimide, polyisoprene, polylactic acid, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polypropylene, polystyrene, polysulfone, polyvinyl acetate, polyvinyl chloride, as well as polymers or copolymers based on acrylonitrile-butadiene, cellulose acetate, ethylene-vinyl acetate, ethylene vinyl alcohol, styrene-butadiene, vinyl acetate-ethylene, and mixtures thereof. “Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccharides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Application 2004/0110648 A1 and U.S. Pat. No. 6,531,444. Silicones are also examples of polymers that may be used as PDT, and can provide perfume benefits in a manner similar to the polymer-assisted delivery “matrix system”. Such a PDT is referred to as silicone-assisted delivery (SAD). One may pre-load silicones with perfume, or use them as an equilibrium system as described for PAD. Suitable silicones as well as making same may be found in USPA 20050143282A1. Functionalized silicones may also be used as described in USPA 2006/003913 A1. Examples of silicones include polydimethylsiloxane and polyalkyldimethylsiloxanes. Other examples include those with amine functionality, which may be used to provide benefits associated with amine-assisted delivery (AAD) and/or polymer-assisted delivery (PAD) and/or amine-reaction products (ARP). Other such examples may be found in USPA 2005/0003980 A1. b.) Reservoir Systems: Reservoir systems are also known as a core-shell type technology, or one in which the fragrance is surrounded by a perfume release controlling membrane, which may serve as a protective shell. The material inside the microcapsule is referred to as the core, internal phase, or fill, whereas the wall is sometimes called a shell, coating, or membrane. Microparticles or pressure sensitive capsules or microcapsules are examples of this technology. Microcapsules of the current invention are formed by a variety of procedures that include, but are not limited to, coating, extrusion, spray-drying, interfacial, in-situ and matrix polymerization. The possible shell materials vary widely in their stability toward water. Among the most stable are polyoxymethyleneurea (PMU)-based materials, which may hold certain PRMs for even long periods of time in aqueous solution (or product). Such systems include but are not limited to urea-formaldehyde and/or melamine-formaldehyde. Gelatin-based microcapsules may be prepared so that they dissolve quickly or slowly in water, depending for example on the degree of cross-linking. Many other capsule wall materials are available and vary in the degree of perfume diffusion stability observed. Without wishing to be bound by theory, the rate of release of perfume from a capsule, for example, once deposited on a surface is typically in reverse order of in-product perfume diffusion stability. As such, urea-formaldehyde and melamine-formaldehyde microcapsules for example, typically require a release mechanism other than, or in addition to, diffusion for release, such as mechanical force (e.g., friction, pressure, shear stress) that serves to break the capsule and increase the rate of perfume (fragrance) release. Other triggers include melting, dissolution, hydrolysis or other chemical reaction, electromagnetic radiation, and the like. Suitable capsule wall materials include, in addition to aminoplasts, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol, polysaccharides and modified polysaccharides, gel forming proteins, modified celluloses such as carboxymethylcelluloses and hydroxyethylcelluloses, polyacrylates, polyureas, polyurethanes and mixtures thereof. The capsules may be further coated with an additional coating that can improve the deposition and/or retention of the capsule on the desired surface. Suitable coating materials include a cationic polymer selected from the group consisting of selected from the group consisting of poly saccharides, cationically modified starch, cationically modified guar, polysiloxanes, poly diallyl dimethyl ammonium halides, copolymers of poly diallyl dimethyl ammonium chloride and vinyl pyrrolidone, acrylamides, imidazoles, imidazolinium halides, imidazolium halides, poly vinyl amine, copolymers of poly vinyl amine and N-vinyl formamide to the surface of the capsule to form a cationically coated polymer encapsulated material. Typical capsules have a diameter of 1 micron to 500 microns. The use of pre-loaded microcapsules requires the proper ratio of in-product stability and in-use and/or on-surface (on-situs) release, as well as proper selection of PRMs. Microcapsules that are based on urea-formaldehyde and/or melamine-formaldehyde are relatively stable, especially in near neutral aqueous-based solutions. These materials may require a friction trigger which may not be applicable to all product applications. Other microcapsule materials (e.g., gelatin) may be unstable in aqueous-based products and may even provide reduced benefit (versus free perfume control) when in-product aged.


VIII. Pro-Perfume (PP): This technology refers to perfume technologies that result from the reaction of perfume materials with other substrates or chemicals to form materials that have a covalent bond between one or more PRMs and one or more carriers. The PRM is converted into a new material called a pro-PRM (i.e., pro-perfume), which then may release the original PRM upon exposure to a trigger such as water or light. Pro-perfumes may provide enhanced perfume delivery properties such as increased perfume deposition, longevity, stability, retention, and the like. Pro-perfumes include those that are monomeric (non-polymeric) or polymeric, and may b e pre-formed or may be formed in-situ under equilibrium conditions, such as those that may be present during in-product storage or on the wet or dry situs. Nonlimiting examples of pro-perfumes include Michael adducts (e.g., beta-amino ketones), aromatic or non-aromatic imines (Schiffs Bases), oxazolidines, beta-keto esters, and orthoesters. Another aspect includes compounds comprising one or more beta-oxy or beta-thio carbonyl moieties capable of releasing a PRM, for example, an alpha, beta-unsaturated ketone, aldehyde or carboxylic ester. The typical trigger for perfume release is exposure to water; although other triggers may include enzymes, heat, light, pH change, autoxidation, a shift of equilibrium, change in concentration or ionic strength and others. For aqueous-based products, light-triggered pro-perfumes are particularly suited. Such photo-pro-perfumes (PPPs) include but are not limited to those that release coumarin derivatives and perfumes and/or pro-perfumes upon being triggered. The released pro-perfume may release one or more PRMs by means of any of the above mentioned triggers. In one aspect, the photo-pro-perfume releases a nitrogen-based pro-perfume when exposed to a light and/or moisture trigger. In another aspect, the nitrogen-based pro-perfume, released from the photo-pro-perfume, releases one or more PRMs selected, for example, from aldehydes, ketones (including enones) and alcohols. In still another aspect, the PPP releases a dihydroxy coumarin derivative. The light-triggered pro-perfume may also be an ester that releases a coumarin derivative and a perfume alcohol. In one aspect the pro-perfume is a dimethoxybenzoin derivative as described in USPA 2006/0020459 A1. In another aspect the pro-perfume is a 3′,5′-dimethoxybenzoin (DMB) derivative that releases an alcohol upon exposure to electromagnetic radiation. In yet another aspect, the pro-perfume releases one or more low ODT PRMs, including tertiary alcohols such as linalool, tetrahydrolinalool, or dihydromyrcenol. Suitable pro-perfumes and methods of making same can be found in U.S. Pat. No. 7,018,978 B2.


The odor intensity is assessed at the following time intervals after dipping of the smelling strips: 1 hour or less (shown in FIG. 1 as time point “0 days”); 1 day; 2 days; 3 days; 4 days; 7 days; 8 days; 9 days. To ensure that the testers are not influenced, the coded smelling strips are not arranged in a chronological order on the smelling strip stand.

1 hour
0 days
1 day
2 days
3 days
4 days
7 days
8 days
9 days

1 hour; 0 days; 1 day; 2 days; 3 days; 4 days; 7 days; 8 days; 9 days


The odor intensity of the compound of formula (Ia) (black filled bar) is assessed in the fresh state and for a period of up to 3 days by the testers in comparison with Lilial® (black cross-hatched bar) as stronger, and after 4 to 7 days at least comparable to Lilial®. After 9 days, a higher odor intensity of the compound of formula (Ia) compared to Lilial® is observed again.


The odor intensity of compound (Ib) (black dotted bar) is, in the fresh state, stronger than that of Lilial® (black cross-hatched bar) and after one day is comparable to Lilial®. After that, the odor intensity of the compound of formula (Ib) at first decreases more than for Lilial® and the compound of formula (Ia), but after 7 to 9 days the values are comparable or slightly higher than with Lilial®.


a.) Matrix Systems: The fragrance is dissolved or dispersed in a polymer matrix or particle. Perfumes, for example, may be 1) dispersed into the polymer prior to formulating into the product or 2) added separately from the polymer during or after formulation of the product. Diffusion of perfume from the polymer is a common trigger that allows or increases the rate of perfume release from a polymeric matrix system that is deposited or applied to the desired surface (situs), although many other triggers are know that may control perfume release. Absorption and/or adsorption into or onto polymeric particles, films, solutions, and the like are aspects of this technology. Nano- or micro-particles composed of organic materials (e.g., latexes) are examples. Suitable particles include a wide range of materials including, but not limited to polyacetal, polyacrylate, polyacrylic, polyacrylonitrile, polyamide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polychloroprene, poly ethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polychloroprene, polyhydroxyalkanoate, polyketone, polyester, polyethylene, polyetherimide, polyethersulfone, polyethylenechlorinates, polyimide, polyisoprene, polylactic acid, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polypropylene, polystyrene, polysulfone, polyvinyl acetate, polyvinyl chloride, as well as polymers or copolymers based on acrylonitrile-butadiene, cellulose acetate, ethylene-vinyl acetate, ethylene vinyl alcohol, styrene-butadiene, vinyl acetate-ethylene, and mixtures thereof. “Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccarides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Applications 2004/0110648 A1; 2004/0092414 A1; 2004/0091445 A1 and 2004/0087476 A1; and U.S. Pat. Nos. 6,531,444; 6,024,943; 6,042,792; 6,051,540; 4,540,721 and 4,973,422. Silicones are also examples of polymers that may be used as PDT, and can provide perfume benefits in a manner similar to the polymer-assisted delivery “matrix system”. Such a PDT is referred to as silicone-assisted delivery (SAD). One may pre-load silicones with perfume, or use them as an equilibrium system as described for PAD. Suitable silicones as well as making same may be found in WO 2005/102261; USPA 20050124530A1; USPA 20050143282A1; and WO 2003/015736. Functionalized silicones may also be used as described in USPA 2006/003913 A1. Examples of silicones include polydimethylsiloxane and polyalkyldimethylsiloxanes. Other examples include those with amine functionality, which may be used to provide benefits associated with amine-assisted delivery (AAD) and/or polymer-assisted delivery (PAD) and/or amine-reaction products (ARP). Other such examples may be found in U.S. Pat. No. 4,911,852; USPA 2004/0058845 A1; USPA 2004/0092425 A1 and USPA 2005/0003980 A1. b.) Reservoir Systems: Reservoir systems are also known as a core-shell type technology, or one in which the fragrance is surrounded by a perfume release controlling membrane, which may serve as a protective shell. The material inside the microcapsule is referred to as the core, internal phase, or fill, whereas the wall is sometimes called a shell, coating, or membrane. Microparticles or pressure sensitive capsules or microcapsules are examples of this technology. Microcapsules of the current invention are formed by a variety of procedures that include, but are not limited to, coating, extrusion, spray-drying, interfacial, in-situ and matrix polymerization. The possible shell materials vary widely in their stability toward water. Among the most stable are polyoxymethyleneurea (PMU)-based materials, which may hold certain PRMs for even long periods of time in aqueous solution (or product). Such systems include but are not limited to urea-formaldehyde and/or melamine-formaldehyde. Gelatin-based microcapsules may be prepared so that they dissolve quickly or slowly in water, depending for example on the degree of cross-linking. Many other capsule wall materials are available and vary in the degree of perfume diffusion stability observed. Without wishing to be bound by theory, the rate of release of perfume from a capsule, for example, once deposited on a surface is typically in reverse order of in-product perfume diffusion stability. As such, urea-formaldehyde and melamine-formaldehyde microcapsules for example, typically require a release mechanism other than, or in addition to, diffusion for release, such as mechanical force (e.g., friction, pressure, shear stress) that serves to break the capsule and increase the rate of perfume (fragrance) release. Other triggers include melting, dissolution, hydrolysis or other chemical reaction, electromagnetic radiation, and the like. The use of pre-loaded microcapsules requires the proper ratio of in-product stability and in-use and/or on-surface (on-situs) release, as well as proper selection of PRMs. Microcapsules that are based on urea-formaldehyde and/or melamine-formaldehyde are relatively stable, especially in near neutral aqueous-based solutions. These materials may require a friction trigger which may not be applicable to all product applications. Other microcapsule materials (e.g., gelatin) may be unstable in aqueous-based products and may even provide reduced benefit (versus free perfume control) when in-product aged. Scratch and sniff technologies are yet another example of PAD. Perfume microcapsules (PMC) may include those described in the following references: US Patent Applications: 2003/0125222 A1; 2003/215417 A1; 2003/216488 A1; 2003/158344 A1; 2003/165692 A1; 2004/071742 A1; 2004/071746 A1; 2004/072719 A1; 2004/072720 A1; 2006/0039934 A1; 2003/203829 A1; 2003/195133 A1; 2004/087477 A1; 2004/0106536 A1; and U.S. Pat. Nos. 6,645,479 B1; 6,200,949 B1; 4,882,220; 4,917,920; 4,514,461; 6,106,875 and U.S. Pat. Nos. 4,234,627, 3,594,328 and US RE 32713. II. Molecule-Assisted Delivery (MAD):


a.) Matrix Systems: The fragrance is dissolved or dispersed in a polymer matrix or particle. Perfumes, for example, may be 1) dispersed into the polymer prior to formulating into the product or 2) added separately from the polymer during or after formulation of the product. Diffusion of perfume from the polymer is a common trigger that allows or increases the rate of perfume release from a polymeric matrix system that is deposited or applied to the desired surface (situs), although many other triggers are know that may control perfume release. Absorption and/or adsorption into or onto polymeric particles, films, solutions, and the like are aspects of this technology. Nano- or micro-particles composed of organic materials (e.g., latexes) are examples. Suitable particles include a wide range of materials including, but not limited to polyacetal, polyacrylate, polyacrylic, polyacrylonitrile, polyamide, polyaryletherketone, polybutadiene, polybutylene, polybutylene terephthalate, polychloroprene, poly ethylene, polyethylene terephthalate, polycyclohexylene dimethylene terephthalate, polycarbonate, polychloroprene, polyhydroxyalkanoate, polyketone, polyester, polyethylene, polyetherimide, polyethersulfone, polyethylenechlorinates, polyimide, polyisoprene, polylactic acid, polymethylpentene, polyphenylene oxide, polyphenylene sulfide, polyphthalamide, polypropylene, polystyrene, polysulfone, polyvinyl acetate, polyvinyl chloride, as well as polymers or copolymers based on acrylonitrile-butadiene, cellulose acetate, ethylene-vinyl acetate, ethylene vinyl alcohol, styrene-butadiene, vinyl acetate-ethylene, and mixtures thereof. “Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccarides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Applications 2004/0110648 A1; 2004/0092414 A1; 2004/0091445 A1 and 2004/0087476 A1; and U.S. Pat. Nos. 6,531,444; 6,024,943; 6,042,792; 6,051,540; 4,540,721 and 4,973,422. Silicones are also examples of polymers that may be used as PDT, and can provide perfume benefits in a manner similar to the polymer-assisted delivery “matrix system”. Such a PDT is referred to as silicone-assisted delivery (SAD). One may pre-load silicones with perfume, or use them as an equilibrium system as described for PAD. Suitable silicones as well as making same may be found in WO 2005/102261; USPA 20050124530A1; USPA 20050143282A1; and WO 2003/015736. Functionalized silicones may also be used as described in USPA 2006/003913 A1. Examples of silicones include polydimethylsiloxane and polyalkyldimethylsiloxanes. Other examples include those with amine functionality, which may be used to provide benefits associated with amine-assisted delivery (AAD) and/or polymer-assisted delivery (PAD) and/or amine-reaction products (ARP). Other such examples may be found in U.S. Pat. No. 4,911,852; USPA 2004/0058845 A1; USPA 2004/0092425 A1 and USPA 2005/0003980 A1.


“Standard” systems refer to those that are “pre-loaded” with the intent of keeping the pre-loaded perfume associated with the polymer until the moment or moments of perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many “Standard” matrix systems available effectively become “Equilibrium” systems when formulated into aqueous-based products. One may select an “Equilibrium” system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). “Equilibrium” systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to “flatten” the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in USPA 2005/0003980 A1. Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccarides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: US Patent Applications 2004/0110648 A1; 2004/0092414 A1; 2004/0091445 A1 and 2004/0087476 A1; and U.S. Pat. Nos. 6,531,444; 6,024,943; 6,042,792; 6,051,540; 4,540,721 and 4,973,422.


50/30; 5 minutes; 3 minutes; 4.67 minute

1. 20 ml headspace vial 2. Timer. 3. Gas Chromatograph (GC): Agilent model 6890 with a CIS-4 injector (Gerstel, Mulheim, Germany) and MPS-2 Autosampler and TDU. For SPME analysis, we used the split/splitless injector (not the CIS-4 injector). 4. GC column: J&W DB-5 MS, 30 M×0.25 mm ID, 1.0 m film thickness obtained from J&W Scientific of Folsom, Calif., USA. 5. Carrier gas, helium, 1.5 ml/min. flow rate. 6. The injector liner is a special SPME liner (0.75 mm ID) from Supelco. 7. The Detector is a model 5973 Mass Selective Detector obtained from Agilent Technologies, Inc., Wilmington, Del., USA having a source temperature of about 230° C., and a MS Quad temperature of about 150° C. Analysis Procedure: 1. Transfer sample to proper sample tray and proceed with SPME-GC-MS analysis. 2. Start sequence of sample loading and analysis. In this step, the sample is allowed to equilibrate for at least two hours on the auto sampler tray, then sampled directly from the tray. The SPME fiber assembly is DVB/CAR/PDMS (50/30 um, 24 ga, 1 cm length). Sampling time is 5 minutes. 3. Injector temperature is at 260 C. 4. Then GC-MS analysis run is started. Desportion time is 5 minutes. 5. The following temperature program is used: i) an initial temperature of about 50° C. which is held for 3 minutes, ii) increase the initial temperature at a rate of about 6° C./min until a temperature of about 250° C. is reached, then 25° C./min to 275° C., hold at about 275° C. for 4.67 minute. 6. Perfume compounds are identified using the MS spectral libraries of John Wiley & Sons and the National Institute of Standards and Technology (NIST), purchased and licensed through Hewlett Packard. 7. Chromatographic peaks for specific ions are integrated using the Chemstation software obtained from Agilent Technologies, Inc., Wilmington, Del., USA. 8. The ratio for each PRM is calculated by dividing the peak area for the perfume raw material in Sample A by the peak area in Sample B. 9. Each ratio is then weighted by that perfume raw material's weight composition in the perfume. 10. The Headspace Ratio is calculated as the sum of the individual perfume raw material ratios obtained in step 9. (4) Perfume Leakage can Also be Evaluated Via % Liquid-Liquid Extraction and Gas Chromatographic-Mass Spectrometric Analysis


2. Start sequence of sample loading and analysis. In this step, the sample is allowed to equilibrate for at least two hours on the auto sampler tray, then sampled directly from the tray. The SPME fiber assembly is DVB/CAR/PDMS (50/30 um, 24 ga, 1 cm length). Sampling time is 5 minutes.


A "standard" matrix system refers to systems that are "pre-loaded" with the intent of keeping the pre-loaded perfume associated with the polymer until the moment, or moments of, perfume release. Such polymers may also suppress the neat product odor and provide a bloom and/or longevity benefit depending on the rate of perfume release. One challenge with such systems is to achieve the ideal balance between 1) in-product stability (keeping perfume inside carrier until you need it) and 2) timely release (during use or from dry situs). Achieving such stability is particularly important during in-product storage and product aging. This challenge is particularly apparent for aqueous-based, surfactant-containing products, such as heavy duty liquid laundry detergents. Many "Standard" matrix systems available effectively become "Equilibrium" systems when formulated into aqueous-based products. One may select an "Equilibrium" system or a Reservoir system, which has acceptable in-product diffusion stability and available triggers for release (e.g., friction). "Equilibrium" systems are those in which the perfume and polymer may be added separately to the product, and the equilibrium interaction between perfume and polymer leads to a benefit at one or more consumer touch points (versus a free perfume control that has no polymer-assisted delivery technology). The polymer may also be pre-loaded with perfume; however, part or all of the perfume may diffuse during in-product storage reaching an equilibrium that includes having desired perfume raw materials (PRMs) associated with the polymer. The polymer then carries the perfume to the surface, and release is typically via perfume diffusion. The use of such equilibrium system polymers has the potential to decrease the neat product odor intensity of the neat product (usually more so in the case of pre-loaded standard system). Deposition of such polymers may serve to "flatten" the release profile and provide increased longevity. As indicated above, such longevity would be achieved by suppressing the initial intensity and may enable the formulator to use more high impact or low odor detection threshold (ODT) or low Kovats Index (KI) PRMs to achieve FMOT benefits without initial intensity that is too strong or distorted. It is important that perfume release occurs within the time frame of the application to impact the desired consumer touch point or touch points. Suitable micro-particles and micro-latexes as well as methods of making same may be found in U.S. Pre-Grant Publication No. 2005/0003980 A1 . Matrix systems also include hot melt adhesives and perfume plastics. In addition, hydrophobically modified polysaccharides may be formulated into the perfumed product to increase perfume deposition and/or modify perfume release. All such matrix systems, including for example polysaccharides and nanolatexes may be combined with other PDTs, including other PAD systems such as PAD reservoir systems in the form of a perfume microcapsule (PMC). Polymer Assisted Delivery (PAD) matrix systems may include those described in the following references: U.S. Pre-Grant Publication No. 2004/0110648 A1 and U.S. Patent No. 6,531,444 .