Solid, form-stable gels for hair treatment

US6623727B2 · kind B2 · utility

Assignee

• Wella GmbH · DE

Inventors

• Susanne Birkel · Darmstadt, DE
• Michael Lede · Langen, DE
• Juergen Allwohn · Burgschwalbach, DE
• Sabine Baecker · Gerolzhofen, DE
• Thomas Krause · Grafenrheinfeld, DE
• Angeliky Beyer · Waldaschaff, DE

Key dates

• Filing date: Oct 17, 2001
• Grant date: Sep 23, 2003
• Expiry date: Oct 17, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/594
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The solid, form-stable gel for hair treatment contains an aqueous or aqueous-alcoholic base; from 0.5 to less than 2 percent by weight of a carrageenan or a mixture of carrageenans and at least one carrageenan-amount-reducing additive selected from the group consisting of hair fixing polymers, amphiphilic associative thickeners, monoalcohols with 1 to 5 carbon atoms and polyalcohols with 2 to 5 carbon atoms. The carrageenan or mixture of carrageenans and the at least one additive are contained in the gel in respective amounts so that the gel is solid and form-stable, i.e. has a resistance of at least 0.15 N to a compressive force applied at 2000 and 65% relative humidity by means of an 8 mm diameter cylindrical piston that is depressed at a rate of 0.5 mm/s until a compression depth of 1 mm is reached after which the piston is removed at a rate of 0.5 mm/s.