Process for dyeing or printing textile fibre materials in stable black shades using metal complex reactive dyes with a red shift and a yellow or green shift
AssigneeCiba-Geigy Corporation
InventorsWolfgang Sutterlin, Rainer Begrich
Life of this patent
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Abstract
The invention relates to a process for dyeing or printing textile fibre materials in stable shades with reactive dyes which produce grey or black dyeings or prints, which process comprises dyeing or printing textile fibre materials with a mixture of heavy metal-containing, water-soluble reactive dyes which produce grey or black dyeings or prints, each component of which mixture, under identical dyeing, printing and fixation conditions, produces dyeings or prints with a tinge different from the tinge of the dyeings or prints produced by the other component, and carrying out subsequent fixation.
Claims13
A process for dyeing or printing textile fiber materials in stable shades with reactive dyes which produce grey or black dyeings or prints, which comprises dyeing or printing to stable shade textile fiber materials with mixtures of
- (A) the 1:2 chromium complex and the 1:2 cobalt complex of an azo dye of the formula ##STR26## and the 1:2 chromium complex and the 1:2 cobalt complex of an azo dye of the formula ##STR27## wherein X in each of formula (1) and (2) is an identical or different aliphatic, aromatic or heterocyclic fiber reactive radical, the one of the 1:2 chromium/1:2 cobalt complex dyes produces dyeings or prints in grey or black shades with a reddish tinge and the other of which 1:2 chromium/1:2 cobalt complex dyes produces dyeings or prints in grey or black shades with a yellowish or greenish tinge;
- or
- (B) the 1:2 chromium complex of an azo dye of formula ##STR28## and the 1:2 cobalt complex of an azo dye of formula ##STR29## wherein X in each of formulas (1) and (2) is an identical or different aliphatic, aromatic or heterocyclic fiber reactive radical, which 1:2 chromium complex dye produces dyeings or prints in grey or black shades with a greenish tinge and which 1:2 cobalt complex dye produces dyeings or prints in grey or black shades with a reddish tinge.
A dye mixture for dyeing or printing textile fiber material in stable shades, which mixture comprises:
- (A) the 1:2 chromium complex and the 1:2 cobalt complex of an azo dye of the formula ##STR38## and the 1:2 chromium complex and the 1:2 cobalt complex of an azo dye of the formula ##STR39## wherein X in each of formulas (1) and (2), is an identical or different aliphatic, aromatic or heterocyclic fiber reactive radical, the one of the 1:2 chromium/1:2 cobalt complex dyes produces dyeings or prints in grey or black shades with a reddish tinge and the other of which 1:2 chromium/1:2 cobalt complex dyes produces dyeings or prints in grey or black shades with a yellowish or greenish tinge;
- or
- (B) the 1:2 chromium complex of an azo dye of formula ##STR40## and the 1:2 cobalt complex of an azo dye of formula ##STR41## wherein X in each of formulas (1) and (2) is an identical or different aliphatic, aromatic or heterocyclic fiber reactive radical, which 1:2 chromium complex dye produces dyeings or prints in grey or black shades with a greenish tinge and which 1:2 cobalt complex dye produces dyeings or prints in grey or black shades with a reddish tinge.
Dependencies are inferred from the claim text.