Aqueous dyestuff preparations of dyestuffs insoluble to difficultly soluble in water

Abstract

New aqueous, stable, highly concentrated, finely dispersed, flowable dyestuff preparations having a low content of dispersing agents and a high content of dyestuff insoluble to difficultly soluble in water are described, which dyestuffs have a particle size smaller than 10 .mu., particularly smaller than 2 .mu., the said preparations being characterised in that they contain at least 10 percent by weight of water, at least 30 percent by weight of a finely dispersed dyestuff, especially a disperse or vat dyestuff, and a mixture consisting of at most 10 percent by weight of an anionactive dispersing agent, at most 5 percent by weight of a nonionic dispersing agent and at most 35 percent by weight of a hydrotropic agent as well as, optionally, further additives. The said dyestuff preparations are especially useful for the preparation of printing pastes having an aqueous base or a water-in-oil emulsion base, which themselves can be used preferably for the printing of carrier materials, particularly paper, suitable for transfer printing.

Dependencies are inferred from the claim text.