Composition comprising polyion complex with low molecular weight chitosans
AssigneeL'oreal
InventorsMariko Yamamoto, Takehiko Kasai, Toshifumi Shiroya, Shinsuke Okuda, Tatsushi Isojima
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Abstract
The present invention relates to a composition comprising: (a) at least one cationic polymer: (b) at least one anionic polymer; (c) at least one non-polymeric acid having two or more pKa values or salt(s) thereof; and (d) water, wherein the (a) cationic polymer is selected from chitosans with a molecular weight of 20,000 or less. The composition according to the present invention is stable and capable of forming a polyion complex and providing good spreadability during application and improved texture such as reduced stickiness after application.
Claims15
A composition, comprising:
- (a) at least one cationic polymer:
- (b) at least one anionic polymer;
- (c) at least one non-polymeric acid having two or more pKa values or salt(s) thereof;
- and
- (d) water,
- wherein
- the (a) cationic polymer is selected from chitosans with a molecular weight of 20,000 or less.
A use of (a) at least one cationic polymer, wherein the (a) cationic polymer is selected from chitosans with a molecular weight of 20,000 or less,
- in a composition comprising:
- (b) at least one anionic polymer;
- (c) at least one non-polymeric acid having two or more pKa values or salt(s) thereof;
- and
- (d) water,
- in order to stabilize the composition and/or improve the spreadability of the composition.
A film, preferably a cosmetic film, comprising:
- (a) at least one cationic polymer;
- (b) at least one anionic polymer;
- and
- (c) at least one non-polymeric acid having two or more pKa values or salt(s) thereof,
- wherein
- the (a) cationic polymer is selected from chitosans with a molecular weight of 20,000 or less.
A use of (a) at least one cationic polymer, wherein the (a) cationic polymer is selected from chitosans with a molecular weight of 20,000 or less,
- in a film comprising:
- (b) at least one anionic polymer;
- and
- (c) at least one non-polymeric acid having two or more pKa values or salt(s) thereof,
- in order to improve the texture of film, preferably in order to enhance moisturizing feeling, softness and smoothness provided by the film and/or to reduce stickiness of the film, and more preferably in order to reduce the stickiness of the film.
Dependencies are inferred from the claim text.