Yellow cationic dyes for dyeing of organic material

Details Yellow cationic dyes for dyeing of organic material Yellow cationic dyes for dyeing of organic material

2007-08-21

2007-08-21

Elhilo, Eisa (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

C008S406000, C008S407000, C008S409000, C008S426000, C008S568000, C546S332000, C132S202000, C132S208000

Reexamination Certificate

active

10501576

ABSTRACT:
The present invention relates to novel cationic yellow dyes of formula (1) wherein R1and R2are each independently of the other a C1-C8alkyl radical or an unsubstituted or substituted benzyl radical, R3is hydrogen, C1-C8alkyl, C1-C8alkoxy, cyanide or halide, preferably hydrogen and X is an anion, with the proviso that at least one of the substitutents R1is a benzyl radical and R2is a methyl radical, R2is not hydrogen, also to compositions therof, especially comprising other dyes, to processes for the preparation therof and to the use therof in the dyeing of organic material, such as keratin, wool, leather, silk, cellulose or polyamides, especially keratin-containging fibres, cotton or nylon, and preferably human hair.

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