Collagen foil for cosmetic application

US4131650A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Klaus Braumer · Eberbach, DE
• Zdenek Eckmayer · Weinheim, DE

Key dates

• Filing date: Apr 9, 1976
• Grant date: Dec 26, 1978
• Expiry date: Apr 9, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S128/08
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

In the treatment of skin wherein an aqueous paste is applied to the skin, left in contact therewith for a period of time and thereafter removed, the improvement which comprises placing over the paste a foil containing at least about 3 percent of water soluble collagen by weight and having a water permeability of more than about 0.1 gram/dm.sup.2 /minute, whereby collagen is transported through the paste and is absorbed by the skin. Desirably the foil is about 0.01 to 0.03 mm thick and is cross-linked to an extent corresponding to that produced by about 0.1-0.5 percent by weight of glutardialdehyde applied in an acid medium. It may further contain a cosmetically active agent such as an amino acid, peptide, protein, hormone, placenta-extract, phosphatide, tissue-extract, fresh cells and vitamins. The paste may be dried by heating, producing shrinkage of the foil to increase contact with the skin.