Hair shaping method using acidic aqueous intermediate rinse to prevent overcurling

US6173717A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Dieter Schonert · Bochum, DE
• Beate Dannecker · Darmstadt, DE
• Gunther Lang · Reinheim, DE
• Dieter Hoch · Pfungstadt, DE
• Wilfried K. Kalbacher · São Paulo, BR
• Johann Märkl · Nassenfels, DE

Key dates

• Filing date: Aug 2, 1999
• Grant date: Jan 16, 2001
• Expiry date: Aug 2, 2019

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K8/44
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Methods of permanent shaping and volumizing hair that are gentle and prevent overcurling are described. In one method using curlers to curl the hair, an alkaline permanent shaping composition having a pH of 7.6 to 11 and including a hair keratin-reducing substance is applied to the hair and allowed to act on the hair for 5 to 30 minutes at room temperature or for 2 to 20 minutes at an elevated temperature. Then the hair is optionally rinsed with water and subsequently with an acidic aqueous intermediate rinse, which has a pH of 2 to 6.5 and includes an aliphatic organic acid. Next the hair is wound onto curlers, after which the hair is allowed to rest for 30 minutes at room temperature or 20 minutes at an elevated temperature. After the resting period the hair is treated with an oxidant-based fixative, which can be a solution of hydrogen peroxide, and the curlers are removed. The hair is subsequently rinsed with water or washed with a shampoo to remove the fixative and combed into a hair style. For methods of uncurling hair the method is similar, but the step of winding on curlers is replaced by a step of combing the hair out and the acidic aqueous intermediate treating agent is in…