Stable aqueous dyestuff preparations of finely dispersed water-insoluble or sparingly water-soluble dyes
AssigneeCiba-Geigy Corporation
InventorCarl Becker
Life of this patent
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Abstract
The invention provides aqueous dyestuff preparations of water-insoluble or sparingly water-soluble dyes which may be used for preparing printing pastes to be used for printing textile material as well as for printing supports for transfer printing. The preparations contain at least 10% by weight of water, 10 to 60% by weight of a finely dispersed water-insoluble or sparingly water-soluble dye, 0.1 to 5% by weight of at least one anionic dispersant, and 0.5 to 5% by weight of a non-ionic copolymer of ethylene oxide and a further olefin oxide, said copolymer having an ethylene oxide content of at least 65% by weight and a molecular weight of more than 12,000, and also, if desired, further ingredients.
Claims46
An aqueous dyestuff preparation of a water-insoluble or sparingly water-soluble dye having a particle size of less than 10.mu. which contains at least 10% by weight of water, 10 to 60% by weight, of a finely dispersed water-insoluble or sparingly water-soluble dye, 0.1 to 5% by weight of a ligninsulphonate and 0.5 to 5% by weight of a non-ionic copolymer of ethylene oxide and propylene oxide, said copolymer having an ethylene oxide content of at least 65% by weight and a molecular weight of more than 12,000.
A printing paste according to claim 40 which contains a polyacrylic thickener as thickener.
Dependencies are inferred from the claim text.