Patent · US Active

Dyes containing a thiol group

US7771490B2 · kind B2 · utility

3Cited by

1References

14Claims

0Family size

Assignee

Ciba Corp. · US

Inventors

Victor Paul Eliu · Lörrach, DE
Beate Fröhling · Weil am Rhein, DE
Dominique Kauffmann · Illzach, FR

Key dates

Filing date	Aug 21, 2006
Grant date	Aug 10, 2010
Priority date	—
Expiry date	Aug 21, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B44/107
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Disclosed are thiol dyes of formula (I), wherein R1, R2, R3, R4 and R5 independently from each other are hydrogen; unsubstituted or substituted, straight-chain or branched, monocyclic or polycyclic, interrupted or uninterrupted C1-C14alkyl; C2-C14alkenyl; C6-C10aryl; C6-C10aryl-C1-C10alkyl; or C5-C10alkyl(C5-C10aryl); A is a residue of an organic dye; and Y1 is the direct bond; C1C10alkylene; C5-C10cycloalkylene; C5-C12arylene; or C5-C12arylene-(C1-C10alkylene). The compounds are used to dye hair with or without reducing agents. Furthermore, the present invention relates to compositions comprising thiol dyes of formula (I) and to process for the preparation of theses compounds.

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