Cosmetic compositions based upon N-hydroxypropyl-chitosans, new N-hyroxypropyl-chitosans, as well as processes for the production thereof

US4780310A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Guther Lang · Reinheim, DE
• Gerhard Maresch · Darmstadt, DE
• Harald Wendel · Ober-Ramstadt, DE
• Eugen Konrad · Darmstadt, DE
• Hans-Rudi Lenz · Darmstadt, DE
• Jurgen Titze · Groß-Bieberau, DE

Key dates

• Filing date: Nov 21, 1986
• Grant date: Oct 25, 1988
• Expiry date: Nov 21, 2006

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q5/10
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Cosmetic compositions are disclosed, for the treatment of skin or hair, with a content of new N-hydroxypropyl-chitosan derivatives, composed of (a) 4 to 40 Mol-% units of Formula (I) ##STR1## and (b) 60 to 96 Mol-% units of Formula (II) ##STR2## wherein R.sup.1 and R.sup.2 are the same or different and are each hydrogen or the group ##STR3## with n being equal to an integer from 1 to 5, with the proviso that in at least 50% of the units of (II), R.sup.1 and R.sup.2 are not simultaneously hydrogen, or the salts thereof; along with new N-hydroxypropyl-chitosan derivatives and their salts as well as a process for the production of these new compounds from propylene oxide and chitosan.