Fluid and stable dispersions of anionic dyestuffs
AssigneeCiba-Geigy Corporation
InventorsHans Mollet, Wolfgang Rehmann
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Abstract
The present invention concerns new fluid and stable dispersions of anionic dyestuffs, containing (a) dispersed anionic dyestuff with a maximum particle size of 5.mu., (b) a dispersing agent which comprises (i) a combination of at least two different anion-active dispersing agents or (ii) a combination of an anion-active dispersing agent and at least one wetting agent or (iii) a combination of at least two different anion-active dispersing agents and at least one wetting agent, (c) optionally further auxiliaries and (d) water, As well as a process for their production and their application to dyeing and printing of organic material, in particular fibre material of natural and synthetic polyamide.
Claims7
A fluid and stable anionic dyestuff dispersion having a viscosity of 3 to 500 centipoise comprising as essential components
- (a) 10 to 50% by weight of at least one dispersed anionic dyestuff having a particle size below 5.mu.;
- (b) 5 to 80%, relative to the amount of dyestuff, as a dispersing agent a mixture selected from the group consisting of:
- (1) sodium lignin sulphonate and disodiumdinaphthylmethane-disulphonate,
- (2) sodium lignin sulphonate and decyloxyacetic acid monoethanolamide, and
- (3) disodiumdinaphthylmethanedisulphonate and sodiumdioctylsulphosuccinate;
- and
- (c) 20 to 80% by weight of the dispersion of water.
Dependencies are inferred from the claim text.