Black-dyeing inks and their use

Details Black-dyeing inks and their use Black-dyeing inks and their use

2006-06-06

2006-06-06

Powers, Fiona T. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

C534S624000, C008S549000

Reexamination Certificate

active

07057024

ABSTRACT:
Black-dyeing aqueous inks comprising20 to 95% by weight of at least one dye (A), together with 5 to 80% by weight of at least one dye chosen from the group consisting of (B) and (C), based on the total weight of the dyes (A), (B) and (C) in the ink, and1 to 40% by weight of a water-miscible organic solvent, based on the total weight of the ink, the dye (A) containing, as the colouring part of the molecule, one or more radicals of the formula (I), (II), (III) or (IV)the dye (B) containing, as the coloring part of the molecule, one or more mono- or disazo radicals containing sulfo groups or one or more radicals of the formula (V), (VI), (VII) or (VIII)and the dye (C) containing, as the coloring part of the molecule, one or more mono- or disazo radicals containing sulfo groups or one or more radicals of the abovementioned formula (V), (VI), (VII) or (VIII) and one or more radicals of the abovementioned formula (I), (II), (III) or (IV), in which(G)0-2is 0 to 2 identical or different substituents from the group consisting of substituted or unsubstituted amino, hydroxyl and nitro,L is substituted or unsubstituted amino,R is halogen, C1–C4alkyl, C1–C4alkoxy, C2–C4alkanoylamino, hydroxyl, carboxyl, nitro or cyano,(V)0-2is 0 to 2 identical or different substituents from the group consisting of halogen, C1–C4alkyl, C1–C4alkoxy, β-sulfatoethylsulfonyl and sulfo,(W)0-1is an N-acyl radical, if any,n is the number 0, 1, 2 or 3,m is the number 1, 2 or 3 andr and q are the number 0 or 1.The inks according to the invention are distinguished by good black shades without a change in shade in artificial light (metamerism) and an outstanding fastness to light.

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