CONSUMER PRODUCT COMPRISING A PLURALITY OF MICROCAPSULES DEFINED BY THE MEAN TOTAL SURFACE AREA

Abstract

The present invention relates to a consumer product comprising a plurality of microcapsules, to a method for obtaining a consumer product and to a use of a plurality of microcapsules in a such a consumer product.

Claims

1. A consumer product comprising a plurality of microcapsules, the microcapsules comprising a core and a shell around the core, the core comprising at least one functional material, wherein the mean total surface area of the plurality of microcapsules comprised in one litre of consumer product is from 0.02 to 0.27 m.sup.2.

2. The consumer product according to claim 1, wherein the mean total surface area of the plurality of microcapsules is calculated based on the surface mean diameter D(3,2) and on the volume median diameter D.sub.v(50) of the microcapsules.

3. The consumer product according to claim 1, wherein the volume median diameter D.sub.v(50) is from 5 to 50 μm.

4. The consumer product according to claim 1, wherein the consumer product has a turbidity lower than 350 NTU at 25° C.

5. The consumer product according to claim 1; wherein the at least one functional material is selected from a fragrance, a flavour and a cosmetic ingredient.

6. The consumer product according to claim 5, wherein the fragrance comprises at least one fragrance ingredient selected from the group consisting of: 2,6,10-trimethylundec-9-enal; 2-(tert-butyl)cyclohexyl acetate; decanal; 2-methyldecanal; undec-10-enal); undecanal; dodecanal; 2-methylundecanal; (E)-undec enal; (E)-dodec-2-enal; allyl 2-(isopentyloxy)acetate; allyl 3-cyclohexylpropanoate; allyl heptanoate; 1-((2-(tert-butyl)cyclohexyl)oxy)-butan-2-ol; 1,3,4,5,6,7-hexahydro.beta.,1,1,5,5-pentamethyl-2H-2,4a-methanonaphthalene-8-ethanol; pentyl 2-hydroxybenzoate; 1-(3,3-dimethylcyclohexyl)ethyl formate; (1R,2S,4R)-2T-isopropyl-1,7,7-tri methyl-spiro[bicyclo[2.2.1]heptane-2,4′[1,3]dioxane]; 8-(sec-butyl)-5,6,7,8-tetra-hydroquinoline); (ethoxymethoxy)-cyclododeca ne; (1S,2R,5R)-2-ethoxy-2,6,6-trimethyl-9-methylene-bicyclo[3.3.1]nonane; (2S,4S)-1,7,74n methyl-bicyclo[2.21]-heptan-2-yl acetate; 1-butoxy-1-oxopropan-2-yl butyrate; 4-(tert-butyl)cyclohexyl acetate; (Z)-4,11,11-trimethyl-8-methylene-bicyclo[7.2.0]-undec-4-ene; 1,1,2,3,3-pentamethyl-2,3,6,7-tetrahydro-1H-inden-4(5H)-one; 5-tert-butyl-2-methyl-5-propyl-2H-furan; (E)-3,7-dimethylocta-2,6-dienal; (E)-3,7-dimethylocta-2,6-dienal; (Z)-1,1-diethoxy-3,7-dimethylocta-2,6-diene; 3,7-dimethyloct-6-enal; 3,7-dimethyloct-6-en-1-ol 3,7-dimethyloct-6-en-1-yl acetate; 3,7-dimethyloct-6-en-1-yl formate; 3,7-dimethyloct-6-enenitrile; 3,7-dimethyloct-6-en-1-yl propionate; dodecanenitrile; 4-cyclohexyl-2-methylbutan-2-ol; (Z)-3-methylcyclotetradec-5-enone; 3-(4-isopropylphenyl)-2-methylpropanal; (allyl 2-(cyclohexyloxy)acetate; cyclohexyl 2-hydroxybenzoate; 8,8-dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalene-2-carbaldehyde; (E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)but-2-en-1-one; (E)-1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one; (E)-1-(2,6,6-trimethyl-cyclohex-3-en-1-yl)but-2-en-1-one; (E)-dec-4-enal; 2-pentylcyclopentanone; propanedioic acid 1-(1-(3,3-dimethylcyclohexyl)ethyl) 3-ethyl ester; 3-methyl-2-pentylcyclopent-2-enone; 2-methyl-1-phenylpropan-2-ol; 2-methyl-1-phenylpropan-2-yl acetate; 2-methyl-1-phenylpropan-2-yl butyrate; 4,7-dimethyloct-6-en-3-one; 2,6-dimethylheptan-2-ol; 1-methyl-4-(prop-1-en-2-yl)cyclohex-1-ene; (E)-4-((3aS,7aS)-hexahydro-1H-4,7-methanoinden-5(6H)-ylidene)butanal; (E) methyl-5-(2,2,3-trimethylcyclopent-3-en-1-yl)pent-4-en-2-ol; ethyl hexanoate; ethyl octanoate; (E)-3,7-dimethylnona-1,6-dien-3-ol; (Z)-3,7-dimethyl nona-1,6-dien-3-yl acetate; ethyl heptanoate; ethyl 2,6,6-trimethylcyclohexa-1,3-diene-1-carboxylate; (1s,4s)-1,3,3-trimethyl-2-oxa-bicyclo[2.2.2]octane; (2S)-1,3,3-trimethylbicyclo[2.2.1]heptan-2-yl acetate; (1S,2R,4R)-1,3,3-trimethylbicyclo[2.2.1]heptan-2-ol); 1-(3,5,5,6,8,8-hexa-methyl-5,6,7,8-tetrahydronaphthalen-2-yl)ethanone; 3-(4-ethylphenyl)-2,2-dimethylpropanal; 3-(3-isopropylphenyl)butanal; (3a R,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1H-4,7-methanoinden-6-yl propionate; 2,4,6-trimethyl-4-phenyl-1,3-dioxane; 2-(sec-butyl)cyclohexanone); (3aS,4S,7R,7aS)-ethyl octa hydro-1H-4,7-methanoindene-3a-carboxylate; 2-methyldecanenitrile; 1-(3,3-dimethylcyclohex-1-en-1-yl)pent-4-en-1-one; (3aR,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1H-4,7-methanoinden-6-yl isobutyrate; (E)-3,7-dimethylocta-2,6-dien-1-ol; (E)-3,7-dimethylocta-2,6-dien-1-yl acetate; (E)-3,7-dimethylocta-2,6-2-one; 1-(2,3,8,8-tetramethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-2-yl)ethanone); 2,4,6-trimethylcyclohex-3-enecarbaldehyde; 3,5,5-dien-1-yl isobutyrate; ethyl 2-ethyl-6,6-dimethylcyclohex-2-enecarboxylate; (E)-oxacyclohexadec-12-en-2-one; methyl 3-oxo-2-pentylcyclopentaneacetate; (2S)-ethyl 3-isopropylbicyclo[2.2.1]hept-5-ene-2-carboxylate; (Z)-hex-3-en-1-yl butyrate; (E)-2-benzylideneoctanal; hexyl isobutyrate; hexyl 2-hydroxybenzoate; 4,4a,5,9b-tetrahydroindeno[1,2-d][1,3]dioxine; (E)-4-(2,6,6-trimethylcyclohex-1-en-1-yl)but-3-en-2-one; (E)-4-(2,6,6-tri methylcyclohex-2-en-1-yl)but-3-en-2-one; (E)-4-(2,5,6,6-tetramethylcyclohex-2-en-1-yl)but-3-en-trimethylhexyl acetate; isopropyl 2-methyl butanoate; (E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one; (3a R,6S,7aS)-3a,4,5,6,7,7a-hexa hydro-1H-4,7-methanoinden-6-yl acetate; (Z)-3-methyl-2-(pent-2-en-1-yl)cyclopent-2-enone; (Z)-3,4,5,6,6-penta methylhept-3-en-2-one; (Z)-1-(1-ethoxyethoxy)hex-3-ene (2E,6Z)-3,7-dimethylnona-2,6-dienenitrile; (Z)-hex-3-en-1-yl methyl carbonate; 3-(4-(tertbutyl)phenyl)-2-methylpropanal; 3,7-dimethylocta-1,6-dien-3-ol; 3,7-dimethylocta-1,6-dien-3-yl acetate; (4E)-9-hydroxy-5,9-dimethyl-4-decenal; 2-methyl-4-oxo-4H-pyran-3-yl isobutyrate; ethyl 2-methylpentanoate; 2,6-dimethylhept-5-enal; 2-isopropyl methylcyclohexanol; 2-isopropyl-5-methylcyclohexanone; 1-((1S,8aS)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methanoazulen-7-yl)ethanone; undecan one; methyl non-2-ynoate; 6,6-dimethoxy-2,5,5-trimethylhex-2-ene; 4-(4-methylpent en-1-yl)cyclohex-3-enecarbaldehyde; 2-(2-(4-methylcyclohex-3-en-1-yl)propyl)cyclopentanone; 2-methyl-6-methyleneoct-7-en-2-yl acetate; (E)-methyl non-2-enoate; (Z)-3,7,11-trimethyldodeca-1,6,10-trien-3-yl acetate; (Z)-3,7-dimethylocta-2,6-dien-1-yl acetate; 6,8-dimethylnonan-2-ol; (Z)-non-6-enal; 3-(4-isobutyl-2-methylphenyl)propanal; 4-(tert-pentyl)cyclohexa none; 2-ethyl-N-methyl-N-(m-tolyl)butanamide; 2-methyl-4-methylene-6-phenyltetrahydro-2H-pyran; 2-cyclohexylidene-2-phenylacetonitrile; 2-cyclohexylidene-2-(o-tolyl)acetonitrile; 2,2-dimethyl-2-pheylethyl propanoate; 1-methyl-4-(4-methylpent-3-en-1-yl)cyclohex-3-enecarbaldehyde; 6-(sec-butyl)quinoline; (E)-2-ethyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)but-2-en-1-ol; 4-(4-hydroxyphenyl)butan-2-one; 2,2,5-trimethyl-5-pentylcyclopentanone; 2,2,2-trichloro-1-phenylethyl acetate); ROSALVA (dec-9-en-1-ol; (1-methyl-2-(5-methylhex-4-en-2-yl)cyclopropyl)-methanol; 4-methylene-2-phenyltetrahydro-2H-pyran; 2-(1-(3,3-dimethylcyclohexyl)-ethoxy)-2-methylpropyl cyclopropanecarboxylate; 3-(4-isobutylphenyl)-2-methylpropanal; 1-(spiro[4.5]dec-6-en-7-yl)pent-4-en-1-one; (E)-5-methylheptan-3-one oxime; (E)-6-ethyl-3-methyloct-6-en-1-ol; (E)-2-((3,5-dimethylhex-3-en-2-yl)oxy)-2-methylpropyl cyclopropanecarboxylate; 1-methyl-4-propan-2-ylcyclohexa-1,4-diene; 1-methyl-4-(propan-2-ylidene)cyclohex-1-ene; 2-(4-methylcyclohex-3-en-1-yl)propan-2-yl acetate; 3,7-dimethyloctan-3-ol; 2,6-dimethyloctan-2-ol; oxacyclohexadecan-2-one; (E)-tridec-2-enenitrile; (E)-4-methyldec-3-en-5-ol; 2,2,5-trimethyl-5-pentylcyclopentanone; (2,2-dimethoxyethyl)benzene and 2-(2,4-dimethylcyclohexyl)pyridine).

7. The consumer product according to claim 1, wherein the shell comprises a material selected from the group consisting of: aminoplast resins, such as melamine-formaldehyde resins, urea-formaldehyde resins and melamine-urea-formaldehyde resins, polyurea resins, poly(meth)acrylate resins, polyester resins, polysaccharides, proteins, polypeptides, silicon oxides and organosiloxanes.

8. The consumer product according to claim 1, selected from the group consisting of: liquid detergents, hard surface cleaners, shampoos, shower gels, liquid soaps, dish washing liquids and fragranced products comprising ethanol.

9. A method for obtaining a consumer product, in particular a consumer product according to claim 1, the method comprising the steps of: a) Selecting a transparent or translucent product base; b) Adding a plurality of microcapsules in the form of a slurry, so that the total surface area of the plurality of microcapsules comprised in one litre of consumer product is from 0.02 to 0.27 m.sup.2, preferably from 0.02 to 0.12 m.sup.2; c) Dispersing the plurality of the microcapsules.

10. A method of utilizing a plurality of microcapsules in a consumer product, the microcapsules comprising a core and a shell around the core, the core comprising at least one functional material, wherein the mean total surface area of the plurality of microcapsules comprised in one litre of the consumer product is from 0.02 to 0.27 m.sup.2.

Description

EXAMPLE 1—FORMATION OF AMINOPLAST MICROCAPSULES HAVING VARIOUS DIAMETERS

[0063] The microcapsules have been obtained by performing the method disclosed in US 2018/0185808 A1, Example 1. The volume median diameter of the microcapsules was varied by varying the stirring speed during emulsification step 3. In the present case, the volume of the reactor was 0.3 L and the stirrer was a cross-beam stirrer with pitched beam.

[0064] The volume median diameter D.sub.v(50) and the surface mean diameter D(3,2) of the microcapsules were measured using a Malvern Mastersizer 2000S Particle Size Analyzer. A few drops of slurry were added to a circulating stream of degassed water flowing through a scattering cell. Under such conditions of dilution, the angular distribution of the scattering intensity was measured and analyzed by using the proprietary software provided with the apparatus to provide the size distribution of the droplets present in the sample, form which the surface mean and volume median diameters were obtained.

[0065] The solid content of the slurries was 41 to 43 wt.-%.

[0066] In these examples, the density of the microcapsules was adjusted to 1.04 to 1.06 g/cm.sup.3 at 25° C.

TABLE-US-00001 TABLE 1 Volume median diameter and surface average diameter of the microcapsules in the different slurries obtained in Example 1 Example D.sub.v (50) [μm] D(3,2) [μm] Example 1.1 6 7 Example 1.2 11 12 Example 1.3 30 39 Example 1.4 66 53

EXAMPLE 2—FORMATION OF LIQUID DETERGENT SAMPLES COMPRISING MICROCAPSULES

[0067] A series of translucent or transparent liquid fabric care detergent samples (HDLD) were prepared by admixing different amounts of the microcapsule slurries obtained in Example 1 with a regular, transparent unperfumed base having a density of 1.05 g/cm.sup.3 at 25° C. (see Table 2). The effective amounts of microcapsules (m.sub.caps) were obtained from the amounts of added slurries, based on the measured solid content of these slurries. The mean total surface area of the microcapsules in each sample was calculated by applying Equation 6, taking a value of 1.05 g/cm.sup.3 for the density of the microcapsules (ρ.sub.caps).

[0068] The turbidity of the samples was measured at 25° C. by using a HACH 2100Q iS turbidimeter. The value returned by the instrument was the ratio of the scattered light intensity, measured at an angle of 90° with respect to the direction of the incident light, divided by the transmitted light intensity, measured at an angle of 180 with respect to the direction of the incident light. The turbidity values are given in Nephelometric Turbidity Unit (NTU). The turbidity values are reported in Table 2.

[0069] The olfactive performance of the samples was evaluated as follows: 75 g of the laundry liquid detergent was used in a side-loaded wash machine (20 L capacity, loaded with 1 kg terry towels); a wash cycle was performed at a temperature of 40° C., followed by spin-drying. The terry towels for 24 hours at room temperature. The evaluation was performed by gently rubbing one part of the terry towel on another part of same terry towel. The olfactive performance (intensity) was assessed by a panel of 4 experts and rated on a scale of 1-5 (1=barely noticeable, 2=weak, 3=medium, 4=strong and 5=very strong).

TABLE-US-00002 TABLE 2 Characteristics of liquid fabric care detergent comprising different microcapsules at different concentration Capsules Mean total amount surface area of Turbidity Olfactive Slurry [g/l] the capsules [m.sup.2/l] [NTU] Performance Example 1.1.1 0.01 0.014 52 0 Example 1.1.2 0.21 0.28 580 0.5 Example 1.2.1 0.21 0.13 237 1 Example 1.2.2 0.37 0.27 267 2 Example 1.2.3 0.84 0.53 480 2 Example 1.3.1 0.21 0.068 83 1 Example 1.3.2 0.42 0.14 152 2 Example 1.3.3 0.84 0.27 232 2.5 Example 1.3.4 1.26 0.41 360 2.5 Example 1.4.1 0.42 0.02 37 1 Example 1.4.2 0.84 0.05 58 1 Example 1.4.3 1.26 0.070 75 1

[0070] As apparent from Table 2, samples having a mean total surface area of microcapsules comprised in one litre of consumer product from 0.02 to 0.27 m.sup.2 are translucent or even transparent, while still having good olfactive performance. On the other hand, samples falling out of this range are either turbid or show insufficient olfactive performance. Furthermore, samples having a mean total surface area of microcapsules comprised in one litre of consumer product from 0.02 to 0.12 m.sup.2 show particularly low turbidity values, while still having good olfactive performance.