阅读说明：本技术 有机化合物中或与之相关的改进 (Improvements in or relating to organic compounds ) 是由 N·宝格丽 I·M·哈里森 于 2019-03-07 设计创作，主要内容包括：公开了一种组合物,其包含在悬浮介质中的至少一种芯-壳微胶囊。所述微胶囊包含芯和围绕该芯的壳。所述壳包含超支化多糖,所述超支化多糖选自支链淀粉,糊精,超支化淀粉,糖原和植物糖原及其混合物。(A composition is disclosed comprising at least one core-shell microcapsule in a suspending medium. The microcapsules comprise a core and a shell surrounding the core. The shell comprises a hyperbranched polysaccharide selected from the group consisting of pullulan, dextrin, hyperbranched starch, glycogen and phytoglycogen and mixtures thereof.)

1. A composition comprising at least one core-shell microcapsule in a suspension medium, wherein the microcapsule comprises a core and a shell surrounding the core, wherein the shell comprises a hyperbranched polysaccharide selected from the group consisting of pullulan, dextrin, hyperbranched starch, glycogen and phytoglycogen, and mixtures thereof.

2. The composition of claim 1, wherein the ratio of 1,6 '-glycosidic linkages to 1, 4' -glycosidic linkages in the hyperbranched polysaccharide is greater than 1/50, more specifically greater than 1/40, and still more specifically greater than 1/35.

3. The composition of any of the preceding claims, wherein the hyperbranched polymer is embedded into and/or attached to the microcapsule shell.

4. The composition of any of the preceding claims, wherein the amount of hyperbranched polymer is 0.01 to 1 wt%, more specifically 0.02 to 0.5 wt%, and still more specifically 0.05 to 0.25 wt% of the total weight of the microcapsule suspension.

5. The composition of any of the preceding claims, wherein the core comprises a fragrance ingredient, a cosmetic ingredient, or a mixture thereof.

6. The composition of any of the preceding claims, wherein the shell of said at least one core-shell microcapsule comprises a thermosetting resin, in particular a thermosetting resin selected from aminoplast resins, polyurea resins, polyacrylic resins and mixtures thereof.

7. A method for embedding and/or attaching a hyperbranched polymer into and/or onto a microcapsule shell, comprising the steps of:

-dispersing droplets of a core material in a suspension medium in the presence of a shell-forming monomer, prepolymer or precondensate to obtain an emulsion, in particular the suspension medium comprising an emulsifier;

-reacting the monomer, prepolymer or precondensate at the interface of the droplets and the suspension medium to obtain a slurry of core-shell microcapsules;

-adding a hyperbranched polymer;

-obtaining a composition comprising a slurry of core-shell microcapsules, wherein a hyperbranched polymer is embedded in and/or attached in and/or on the shell of said core-shell microcapsules;

-optionally adding one or more suspending agents or preservatives to the slurry;

-optionally dehydrating said slurry to form a composition of core-shell microcapsules, in particular in powder form.

8. Microcapsules obtainable by the process of claim 7.

9. A process for enhancing the deposition of at least one core-shell microcapsule on a surface, in particular on a keratinous surface, said process comprising the steps of: embedding and/or attaching a hyperbranched polymer in and/or on the shell of the core-shell microcapsules, in particular by the method of claim 7.

10. A process for increasing the wash-off resistance of at least one core-shell microcapsule deposited on a surface, in particular on a keratinous surface, said process comprising the steps of: embedding and/or attaching a hyperbranched polymer in and/or on the shell of the core-shell microcapsules, in particular by the method of claim 7.

11. Use of a hyperbranched polymer for enhancing the deposition of at least one core-shell microcapsule on a surface, in particular on a keratinous surface, by embedding and/or attaching a hyperbranched polymer in and/or onto the shell of said core-shell microcapsule, in particular by the method of claim 7.

12. Use of a hyperbranched polymer for increasing the wash-off resistance of at least one core-shell microcapsule deposited on a surface, in particular on a keratinous surface, by embedding and/or attaching the hyperbranched polymer in and/or onto the shell of said core-shell microcapsule, in particular by the method of claim 7.

13. A consumer product comprising the composition of any one of claims 1-6.

14. The consumer product of claim 13, wherein said consumer product is a shampoo, a hair conditioner, a shower gel, or a liquid soap.

Example 1:

preparation of aminoplast core-shell microcapsules comprising a hyperbranched polymer embedded in the shell of the core-shell microcapsules and a perfume as core material.

Microcapsules were prepared by performing the following steps:

a) preparation of a LUPASOL containing 72g of emulsifier^TMPA 140(ex. basf, 20% active, active effective)Quantity: 14g) 19g of the resin precursor LURACOLL^TMSD (ex. BASF, 70% active agent, active agent effective amount: 13.3g) and an aqueous solution of 6.7g resorcinol and 324g water;

b) emulsifying 355g of a perfume into the aqueous solution obtained in step a) by using a cross-beam stirrer with an inclined beam at a stirring speed of 1000 rpm;

c) adjusting the pH of the emulsion obtained in a) to a value of 3.5. + -. 0.3 by adding 11.1g of 10% formic acid and heating the emulsion to 90 ℃;

d) maintaining the temperature at 90 ℃ with stirring over a period of 1 hour, forming a thermosetting aminoplast resin wall around the droplets, thereby forming a slurry of microcapsules having a diameter of 10 micrometers (μm);

e) adding a quantitative amount of a2 wt% solution of the selected hyperbranched polysaccharide in water (as described above);

f) 11.1g of 10% formic acid and 11.1g of the resin precursor LURACOLL were added^TMSD (ex. BASF, 70% active agent, active agent effective amount: 7.8g) while maintaining the temperature at 90 ℃ for 2 hours;

g) the slurry was cooled to room temperature and 3.2g of 10% aqueous ammonia solution was added to give a pH of 5.5-7.

The amount of the hyperbranched polysaccharide solution 2 wt% in water was 50g of the solution (corresponding to 0.1 wt% of the hyperbranched polysaccharide in the slurry) and 150g of the solution (corresponding to 0.3 wt% of the hyperbranched polysaccharide in the slurry). The hyperbranched polysaccharide is amylopectin.

The solid content of the slurry was measured by using a high temperature balance (thermo-balance) operated at 120 ℃. The solids content, expressed as weight percent of the initial slurry deposited on the balance, was achieved when the drying induced weight change rate was reduced to less than 0.1%/min. The slurry had a solids content of 42. + -.1 wt.%. A comparative example without hyperbranched polymer was obtained by a method essentially identical to that described above, but omitting the addition step f) of the hyperbranched polymer.