Cosmetic compostions based upon N-hydroxybutyl-chitosans, N-hydroxybutyl-chitosans as well as processes for the production thereof

US4931271A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Gunther Lang · Reinheim, DE
• Eugen Konrad · Darmstadt, DE
• Harald Wendel · Ober-Ramstadt, DE
• Gerhard Maresch · Darmstadt, DE
• Hans-Rudi Lenz · Darmstadt, DE

Key dates

• Filing date: Dec 18, 1987
• Grant date: Jun 5, 1990
• Expiry date: Dec 18, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/37
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention is directed to cosmetic compositions for the treatment of hair or skin characterized in that they contain new N-hydroxybutyl-chitosans, or their salts, consisting of PA0 (a) 4 to 40 mole percent monomer units of the formula (I) ##STR1## and (b) 60 to 96 mole percent monomer units of the formula (II) ##STR2## wherein R.sup.1 and R.sup.2 are identical or different and designate hydrogen or the group ##STR3## with n being equal to an integer from 1 to 5, provided that R.sup.1 and R.sup.2 are not simultaneously hydrogen in at least 50 percent of the units of formula (II). In addition, it is directed to new N-hydroxybutyl-chitosans and their salts and a process for producing these new compounds from butylene oxide and chitosan.