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US 12,514,807 B2Granted
Cellulose nanocrystal effect pigments for cosmetic applications
AssigneeSun Chemical Corporation
InventorBrian Joseph Schmatz
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Abstract
The present invention relates to a cosmetic composition including an organic effect pigment. The organic effect pigment includes cellulose nanocrystal flakes which have an average size in the range of from 10 to 6500 micrometers.
Claims8
A cosmetic composition comprising an organic effect pigment, wherein the organic effect pigment comprises cellulose nanocrystal flakes, wherein the cellulose nanocrystal flakes have an average size in the range of from 10 to 6500 micrometers;
- wherein the organic effect pigment is obtained as follows:
- (i) providing an aqueous dispersion comprising water and cellulose nanocrystals;
- and
- (ii) subjecting the aqueous dispersion provided according to (i) to drying conditions, obtaining a film;
- and said film is fragmented into flakes, obtaining an organic effect pigment;
- wherein in the aqueous dispersion provided according to (i), the cellulose nanocrystals are comprised in an amount in the range of from 0.05 to 10 weight-%, based on the total weight of the aqueous dispersion;
- wherein the cellulose nanocrystals comprised in the aqueous dispersion provided according to (i) exhibit a crystallite average particle diameter in the range of from 1 to 10 nm;
- and
- wherein the cellulose nanocrystals comprised in the aqueous dispersion provided according to (i) exhibit a crystallite average particle length in the range of from 20 to 200 nm.
6 more elements
Dependencies are inferred from the claim text.