Method for making water-soluble hydrolyzates of keratinaceous materials

US4232123A · kind A · utility

Assignees

• Firma Carl Freudenberg · DE
• Röhm GmbH · DE

Inventors

• Klaus Braeumer · Weinheim, DE
• Zdenek Eckmayer · Weinheim, DE
• Alexander Berg · Mannheim, DE
• Rolf Monsheimer · Darmstadt, DE
• Ernst Pfleiderer · Weiterstadt, DE

Key dates

• Filing date: Jul 9, 1979
• Grant date: Nov 4, 1980
• Expiry date: Jul 9, 1999

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q19/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method is disclosed for making a water-soluble hydrolyzate of a keratinaceous starting material which comprises first subjecting said starting material to acid treatment at a pH of 2 or below and at an elevated temperature above 80.degree. C. to effect mild hydrolysis thereof and then enzymatically degrading said acid-treated material in an aqueous bath in the presence of urea with an alkaline proteinase having an activity optimum in a range between pH 9 and pH 13, the initial pH of the enzymatic treatment being within the pH range optimum for the enzyme employed.