Azomethine direct dyes or reduced precursors of azomethine...

Details Azomethine direct dyes or reduced precursors of azomethine... Azomethine direct dyes or reduced precursors of azomethine...

2008-12-09

2011-11-29

Elhilo, Eisa (Department: 1761)

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

C008S406000, C008S410000, C008S426000, C008S435000, C008S462000

Reexamination Certificate

active

08066782

ABSTRACT:
The invention relates to the dyeing of keratin fibres using azomethine direct dyes or precursors of azomethine dyes obtained from 2-alkylresorcinols. The invention relates to a dye composition comprising at least one azomethine direct dye or pre-cursor of an azomethine direct dye, to a process for dyeing keratin fibres, using the said composition, and to their uses in the dyeing of keratin fibres. This composition allows a particularly stable and fast coloration to be obtained.

REFERENCES:
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patent: 2 254 557 (1975-07-01), None
STIC Search Report dated Mar. 14, 2011.
A. Bonnet et al., “<<Trinoyaux>>. Détermination des structures par RMN1H,13C et15N,” Journal de Chimie Physique, vol. 92, pp. 1823-1828 (1995).
International Search Report for PCT/EP2008/067150, dated May 27, 2009.

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