Kao Corporation

Hitoshi Sakaguchi

Koichi Nakamura

Yoshinori Nishizawa

Akira Kiyomine

Shinobu Nagase

Bernd Nocker

Hiroyuki Suzuki

Kenichi Morita

Yukihiro Kondo

The object of the invention is a new isomer mixture of 3-hydroxybutyl monothioglycollate and 3-hydroxy-1-methyl propyl monothioglycollate in a weight proportion of about 1.5:1 to 4:1, preferably about 2:1 to about 3:1, comprising less than 5%, preferably less than 2% by wt., of 1,3-butanediol thioglycollate, and its use as the sole or main reducing agent in compositions for permanent waving of human hair. The compositions have reduced smell, good waving properties and an extremely low sensitizing potential on human skin.

1,3-butanediol thioglycollate isomer mixture and permanent waving

The object of the invention is a composition for permanent waving of human hair comprising, as sole or main reducing agent one or several polyglycol monothioglycollates or lactates of the general formula ##STR1## wherein R denotes a hydrogen atom or a methyl group, X represents an ethoxy or propoxy group, and n is a number from 2 to 5. These compositions have a low characteristic smell, good waving properties, and an extremely low skin sensitizing potential.

Composition for permanent waving of human hair

Growing community of inventors

Haga-gun, Japan

Hitoshi Sakaguchi