Naphthalene derivatives and colorants for keratin fibers...

Details Naphthalene derivatives and colorants for keratin fibers... Naphthalene derivatives and colorants for keratin fibers...

2004-10-20

2008-11-18

Elhilo, Eisa B (Department: 1796)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S406000, C008S454000, C008S570000, C008S572000, C008S607000, C552S284000

Reexamination Certificate

active

07452385

ABSTRACT:
The agent for coloring keratin fibers, especially human hair, contains at least one common cosmetic additive; an oxidant, such as hydrogen peroxide; and at least one naphthalene derivative of formula (I):wherein A1and A2are different from each other and, independently of each other, each denote a partial structure of formula (II), (IIIa), (IIIb), (IV), (V), or (VI):E is O or S; Y is N or a quaternary nitrogen atom substituted with a C1-C6-alkyl group, a C2-C4-hydroxyalkyl group, or a C4-C6-polyhydroxyalkyl group. New naphthalene derivatives are also described.

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