Patent · US Expired

Method and agents for permanently styling hair, with a base consisting of N,N-disubstituted mercaptoacetamides

US6399051B2 · kind B2 · utility

7Cited by

2References

4Claims

0Family size

Assignee

Wella GmbH · DE

Inventors

Beate Dannecker · Darmstadt, DE
Guenther Lang · Reinheim, DE
Wolfgang Hanefeld · Marburg, DE
Heiko Walther · Marburg, DE

Key dates

Filing date	Jun 8, 1999
Grant date	Jun 4, 2002
Priority date	—
Expiry date	Jun 8, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C323/60
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The present invention relates to a composition and method for permanently shaping hair, in which an N,N-disubstituted mercaptoacetamide of the formula I: or a salt thereof, wherein R1 and R2 are each independently selected from the group consisting of straight-chain alkyl groups having 1 to 6 carbon atoms, branched-chain alkyl groups having 1 to 6 carbon atoms, monohydroxyalkyl groups having 1 to 6 carbon atoms, polyhydroxyalkyl groups having 1 to 6 carbon atoms and carboxyalkyl groups having 1 to 6 carbon atoms, is employed as keratin reducing agent. A process for making these mercaptoacetamides is also described as well as a novel mercaptoacetamide, N-ethyl-2′-hydroxyethyl-mercaptoacetamide. The mercaptoacetamides provide gentle and uniform shaping of hair in a pH range of 4.5 to 9.5 and do not cause allergic or sensitizing reactions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.