Surface treated hydrophobic cellulose
AssigneeMiyoshi America, Inc.
InventorsShoji TAKEKAWA, Miwa OHARA
Life of this patent
Estimating the term…
Abstract
The present disclosure relates generally to cellulose powders having improved dispersibility, feel, and stability in which the powders are surface modified with at least a modified dextrin and/or a modified amino acid to render the cellulose powder hydrophobic. The powders may be used in cosmetic compositions such as a powder foundation, liquid foundation, point makeup, lip, mascara, eyeliner, skin care products which are skin cream, hair care products which are shampoo, conditioner, treatment and hair styling products, hair color products, cleansing products which are a body soap, hand soap and facial cleanser.
Claims16
A hydrophobic cellulose powder comprising:
- (a) from about 75% to about 99.5% by weight of cellulose powder particles;
- and
- (b) from about 0.5% to about 25% by weight of a surface treatment agent selected from modified dextrin or a modified amino acid,
- wherein the hydrophobic cellulose powder is relatively insoluble in an aqueous medium, and can be dispersed in an emulsion to provide a stable emulsion for 4 weeks or more.
A method of making a hydrophobic cellulose powder comprising:
- (a) preparing a mixture of from about 0.5% to about 25% by weight of a surface treatment agent selected from modified dextrin or a modified amino acid, and from about 75% to about 99.5% by weight by weight of the hydrophobic cellulose powder in an agent suitable to dissolve or disperse the surface treatment agent, wherein the weight percentages are based on the total weight of the surface treatment agent and cellulose powder;
- (b) mixing the mixture of (a) with agitation to uniformly disperse the powder in the mixture and form a uniformly dispersed surface treated cellulose powder mixture;
- (c) heating the uniformly dispersed surface treated cellulose powder mixture either during (b) or after (b);
- and
- (c) separating the hydrophobic cellulose powder from the uniformly dispersed surface treated cellulose powder mixture, and optionally drying to form a hydrophobic cellulose powder.
A cosmetic composition comprising:
- (a) at least one hydrophobic cellulose powder comprising:
- (i) from about 75% to about 99.5% by weight of cellulose powder particles;
- and (ii) from about 0.5% to about 25% by weight of a surface treatment agent selected from modified dextrin or a modified amino acid;
- and
- (b) a cosmetically acceptable carrier.
Dependencies are inferred from the claim text.