Cosmetic compositions on the basis of alkyl-hydroxypropyl-substituted chitosan derivatives, new chitosan derivatives and processes for the production thereof

US4845204A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Gunther Lang · Reinheim, DE
• Gerhard Maresch · Darmstadt, DE
• Hans-Rudi Lenz · Darmstadt, DE
• Eugen Konrad · Darmstadt, DE
• Lothar Breuer · Klein-Bieberau, DE
• Dietrich Hoch · Pfungstadt, DE

Key dates

• Filing date: Oct 3, 1986
• Grant date: Jul 4, 1989
• Expiry date: Oct 3, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S424/02
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

New alkyl-hydroxypropyl-chitosans of the formula I EQU HO[C.sub.6 H.sub.11-m-q NO.sub.4 (R.sup.1).sub.m (R.sup.2).sub.n (R.sup.3).sub.q ].sub.p H (I) (m=0-0.6; n=0.5-10; q=0.5-4; p=50-5000; R.sup.1 =acetyl; ##STR1## R.sup.3 =C.sub.1 -C.sub.6 -alkyl) and their salts with organic or inorganic acids. The invention is directed, in addition, to a process for producing the chitosan derivatives of the formula I, as well as cosmetic compositions for the treatment of hair or skin, particularly compositions for strengthening hair, comprising a content of these chitosan derivatives. The described alkyl-hydroxypropyl-chitosans are distinguished by their favorable solubility in organic solvents. Therefore, they can also be used, for example, in anhydrous hairsprays.