Dye preparations containing methine dyes
AssigneeBASF SE
InventorsRudiger Sens, Bernd Siegel, Manfred Herrmann
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Abstract
Dye preparations useful as inks in the inkjet process and for sublimation transfer printing comprise, based on the weight of each preparation, from 0.1 to 30% by weight of one or more methine dyes, from 0.1 to 20% by weight of a dispersant based on an arylsulfonic acid-formaldehyde condensation product or from 0.1 to 20% by weight of a water-soluble dispersant based on alkoxylated phenols and optionally water.
Claims6
A process for inkjet printing comprising applying to a substrate through an inkjet a dye composition comprising, based on the weight of the composition, from 0.1 to 30% by weight of one or more methine dyes, from 0.1 to 20% by weight of a dispersant based on an arylsulfonic acid-formaldehyde condensation product comprising from 3 to 50% by weight, based on the weight of the dispersant, of one or more aromatic or long-chain aliphatic carboxylic acids, their salts, their anhydrides or a mixture thereof, or from 0.1 to 20% by weight of a water-soluble dispersant based on alkoxylated phenols of the formula III or IV ##STR17## where a is from 0 to, on average, 125,
- b is on average from 37 to 250, the ratio of b:a being at least 1:1 in the case b>37, and
- d is 0 or 1, or mixtures thereof and optionally water.
Dependencies are inferred from the claim text.