Patent · US Expired

Composition for permanent waving of human hair

US5612023A · kind A · utility

3Cited by

2References

6Claims

0Family size

Assignee

KAO CORPORATION · JP

Inventors

Akira Kiyomine · Sakae, JP
Yoshinori Nishizawa · Tochigi, JP
Bernd Nöcker · Darmstadt, DE
Burkhard Rose · Darmstadt, DE

Key dates

Filing date	Apr 15, 1996
Grant date	Mar 18, 1997
Priority date	—
Expiry date	Apr 15, 2016

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K8/46
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A permanent waving composition for human hair without any skin sensitizing effect comprises as reducing agent 1,3-propanediol monothioglycollate and 1,3-propanediol dithioglycollate alone or in admixture with other reducing agents, wherein the content of 1,3-propanediol dithioglycollate is not more than 10%, preferably less than 5% by wt., calculated to the monoester.

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