Process for making quaternary chitosan derivatives for cosmetic agents

US4921949A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Gunther Lang · Reinheim, DE
• Harald Wendel · Ober-Ramstadt, DE
• Eugen Konrad · Darmstadt, DE

Key dates

• Filing date: Mar 8, 1989
• Grant date: May 1, 1990
• Expiry date: Mar 8, 2009

Classification

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

Abstract

The quaternary chitosan derivatives useful in cosmetic compositions are made by a process comprising reacting a chitosan consisting of 50 to 100% deacetylized chitin or a structurally modified chitosan made by reprecipitating and deep freezing, with glycidyl trialkyl ammonium halogenide, particularly glycidyl trimethyl ammonium chloride, and, if necessary, with glycidol. The reaction mixture is advantageously stirred for several hours at 10.degree. to 100.degree. C. The reaction may be performed in the presence of an organic or inorganic acid or base in water.