Nitrophenylenediamine dyes having a quaternary center with a lon

Details Nitrophenylenediamine dyes having a quaternary center with a lon Nitrophenylenediamine dyes having a quaternary center with a lon

1992-09-01

1994-03-29

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

424 70, 564305, A61K 713, C07C21146

Patent

active

052980294

ABSTRACT:
Direct dyes having a quaternary center with a long aliphatic chain, compositions containing those dyes, and the process of using them to dye hair are disclosed. These dyes have a higher affinity for hair and are more shampoo stable than conventional direct dyes, and produce pleasing uniform dyeing.

REFERENCES:
patent: 3893802 (1925-07-01), Kalopissis et al.

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