N-aryl-4,5-diaminopyrazoles and dyes containing said compounds

Details N-aryl-4,5-diaminopyrazoles and dyes containing said compounds N-aryl-4,5-diaminopyrazoles and dyes containing said compounds

2007-03-27

2007-03-27

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S406000, C008S409000, C008S410000, C008S421000, C008S423000, C008S568000, C548S365700

Reexamination Certificate

active

10501151

ABSTRACT:
N-Aryl-4,5-diaminopyrazole of formula (I) or a physiologically compatible salt thereof of an organic or inorganic acidwhereinR1 and R2 independently of each other denote a hydrogen atom, a straight-chain or branched C1–C6-alkyl group, a hydroxyl group, a straight-chain or branched C1–C6-monohydroxyalkyl group, a straight-chain or branched C3–C6-dihydroxyalkyl group, a straight-chain or branched C1–C6-alkoxy group, a straight-chain or branched C1–C6-hydroxyalkoxy group, a straight-chain or branched C3–C6-dihydroxyalkoxy group, an amino group, a C1–C4-monoalkylamino group, a di(C1–C4)-alkylamino group, a halogen atom, a difluoromethyl group or a trifluoromethyl group; Y stands for a nitrogen atom or a C-R3 group, wherein C is a carbon atom of the aromatic ring and R3 is a hydrogen atom, a halogen atom, a straight-chain or branched C1–C6-alkyl group, a straight-chain or branched C1–C6-hydroxyalkyl group, a straight-chain or branched C1–C6-alkoxy group, a straight-chain or branched C2-C6-hydroxyalkoxy group or a straight-chain or branched C2–C6-alkoxyalkoxy group; X denotes an acid radical and n has a value from 0 to 3; provided that when Y stands for a C-R3 group, at least one of the R1, R2 and R3 groups is different from hydrogen; as well as colorants for keratin fibers containing these compounds.

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