Patent · US Expired

Composition for the oxidative dyeing of hair containing 4,5-diaminopyrazole derivatives as well as new 4,5-diaminopyrazole derivatives and process for their synthesis

US5534267A · kind A · utility

327Cited by

1References

11Claims

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	Jun 7, 1994
Grant date	Jul 9, 1996
Priority date	—
Expiry date	Jun 7, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D231/38
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The composition for oxidative dyeing of hair based on a combination of developer substances and coupler substances, contains as a developer substance 4,5-diamino-1-(4'-methoxybenzyl)pyrazole, 4,5-diamino-1-(4'-methylbenzyl)pyrazole, 4,5-diamino-1-(4'-chlorobenzyl)pyrazole, 4,5-diamino-1-(3'-methoxybenzyl)pyrazole, 4-amino-1-(4'-methoxy-benzyl) -5-methylaminopyrazole or 4-amino-5-(2'-hydroxyethyl)amino-1-(4'-methoxybenzyl)pyrazole.

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