Patent · US Expired

Agents for reducing the damage to hair during bleaching and dyeing

US4138478A · kind A · utility

48Cited by

3References

14Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA) · DE

Inventors

Gunter Reese
Erwin Weinrich · Hilden, DE
Edgar Lieske · Düsseldorf, DE

Key dates

Filing date	Nov 3, 1976
Grant date	Feb 6, 1979
Priority date	—
Expiry date	Nov 3, 1996

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S424/03
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Compositions for changing the color of hair by the action (direct or indirect) of compounds therein which release nascent oxygen, do less harm to the hair when they have a content of a water-soluble 3-amino-1-hydroxypropane-1,1-diphosphonic compound. The compound can be in free acid or water-soluble salt or partial ester form. Hair which is pre-treated with one of the mentioned diphosphonic compounds is at least partially protected against the action of nascent oxygen.

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