Patent · US Active

Azomethine direct dyes or reduced precursors of azomethine direct dyes obtained from 2-alkylresorcinols, and hair dyeing process using these dyes or precursors

US8105394B2 · kind B2 · utility

2Cited by

10References

14Claims

0Family size

Assignee

L'Oreal S.A. · FR

Inventors

Madeleine Leduc · Paris, FR
Stéphane Sabelle · Paris, FR
Eric Metais · Tarare, FR
Christophe Rondot · Mitry-Mory, FR

Key dates

Filing date	Dec 9, 2008
Grant date	Jan 31, 2012
Priority date	—
Expiry date	Dec 9, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B55/009
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to the dyeing of keratin fibers using azomethine direct dyes or reduced precursors of azomethine direct dyes of formula (I) and (II) obtained from 2-amino-3-hydroxypyridine. The invention relates to a dye composition comprising at least one azomethine direct dye or a reduced precursor of an azomethine direct dye, to a process for dyeing keratin fibers, using the said composition, and to their uses in the dyeing of keratin fibers. This composition allows a particularly stable and fast coloration to be obtained.

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