Cationic direct dyes
AssigneeCiba Specialty Chemicals Corporation
InventorsVictor Eliu, Beate Frohling
Life of this patent
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Abstract
The present invention relates to novel the cationic dyes of formula (1) wherein R, is an unsubstituted or substituted C1-C14 alkyl or an aryl radical; X− is an anion; R3 is an unsubstituted or substituted C1-C14 alkyl, aryl radical, C1-C6 alkoxy, cyanid, nitro or halide; n is 1 or 2; and if n is 1, then R2 is hydrogen, unsubstituted or substituted C1-C14 alkyl; or if n is 2, then R2 is an unsubstituted or substituted C1-C14 alkylen. Further, the present invention relates to compositions thereof, especially comprising other dyes, to processes for the preparation thereof and to the use thereof in the dyeing of organic material, such as keratin, wool, leather, silk, paper, cellulose or polyamides, and preferably human hair.
Claims19
Cationic dye of formula (1):
- wherein
- R1 is an unsubstituted or substituted C1-C14alkyl or an aryl radical;
- X− is an anion;
- R3 is an unsubstituted or substituted C1-C14alkyl, aryl radical, C1-C6alkoxy, cyanide, nitro or halide;
- n is 1 or 2;
- and
- if n is 1, then R2 is hydrogen, unsubstituted or substituted C1-C14alkyl;
- or
- if n is 2, then R2 is an unsubstituted or substituted C1-C14alkylene.
Cationic dye of formula (18)
- wherein
- R7 is C1-C6alkoxy or halide, and
- X− is an anion,
- R3 is an unsubstituted or substituted C1-C14alkyl, aryl radical, C1-C6alkoxy, cyanide, nitro or halide, and
- R1 is an unsubstituted or substituted C1-C14alkyl or an aryl radical;
- or
- the compound of formula (21)
(canceled)
Dependencies are inferred from the claim text.