Patent · US Expired

Hair dye containing aminopyrazole derivatives as well as pyrazole derivatives

US5380340A · kind A · utility

391Cited by

4References

13Claims

0Family size

Assignee

Wella GmbH · DE

Inventors

Hans Neunhoeffer · Mühltal, DE
Stefan Gerstung · Reinheim, DE
Thomas Clausen · Alsbach, DE
Wolfgang Balzer · Alsbach, DE

Key dates

Filing date	Mar 4, 1993
Grant date	Jan 10, 1995
Priority date	—
Expiry date	Mar 4, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D487/04
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The composition for oxidative dyeing of hair contains at least one coupler and 0.010 to 3.0 percent by weight of at least one developer selected from the group consisting of aminopyrazole derivatives of the formula (I): ##STR1## wherein R is selected from the group consisting of hydrogen and alkyl groups having one to four carbon atoms; n=2 or 3; and physiologically tolerated, water-soluble salts thereof. The developer and coupler substances are present in the composition in a total amount of from 0.1 to 5.0 percent. New pyrazole derivative compounds are also part of the invention.

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