Primary intermediates for oxidative coloration of hair

Details Primary intermediates for oxidative coloration of hair Primary intermediates for oxidative coloration of hair

2006-07-04

2006-07-04

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S406000, C008S408000, C008S410000, C008S411000, C008S412000, C008S421000, C544S165000, C546S229000, C548S355100

Reexamination Certificate

active

07070630

ABSTRACT:
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1):wherein R1and R2are each independently selected from hydrogen atoms, a C1to C5alkyl or hydroxyalkyl group, or R1and R2together with the nitrogen atom to which they are attached form a 5 or 6 member cyclic ring optionally containing one or more additional atoms selected from O, N or S atoms, and n is equal to 1 or 2, with the proviso that when n is equal to 2 only one of R1and R2may be hydrogen.

REFERENCES:
patent: 5620484 (1997-04-01), Maubru
patent: 5976195 (1999-11-01), De la Mettrie
patent: 5993491 (1999-11-01), Lim et al.
patent: 19826457 (1999-12-01), None

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