Aqueous ink composition and colorants useful therein
AssigneeMilliken Research Corporation
InventorsPatrick D. Moore, Clifford R. King, Raj Batlaw
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Abstract
As aqueous ink composition is provided having up to 5 wt. % of a colorant of the formula: A--{Y--X--C(O)--R.sub.1 --C(O)O.sup.- }.sub.p where A is an organic chromophore; Y is a polyoxyalkylene substituent; X is a radical of a reactive hydroxy, amino or thio group; and R.sub.1 is C.sub.2-30, substituted or unsubstituted alkylene, alkenylene, or phenylenealkylene. A counter ion selected from alkaline metal ions, alkaline earth metal ions, ammonium ions, amine salts, and zinc ammonium complexes is present in approximately stoichiometric proportion or greater relative to the colorant in the ink composition.
Claims20
A colorant comprising a compound of the formula:
- A--{Y--X--C(O)--R.sub.1 --C(O)OH}.sub.p
- where A is an organic chromophore;
- Y is a polyoxyalkylene substituent having from 1 to 200 alkylene oxide radicals of C.sub.2-18 alkylene oxides;
- X is a nucleophile selected from O, NR.sub.2 and S, where R.sub.2 is H or C.sub.1-18 alkyl;
- R.sub.1 is selected from alkylene, alkenylene, phenylene and phenylenealkylene, which may optionally be substituted with alkyl or alkenyl, provided that the total number of carbon atoms is between 2 and 30;
- and p is an integer from 1 to 6.
A colorant comprising an organic chromophore, having a poly(oxyalkylene) substituent of from 1 to 200 radicals of alkylene oxide radicals of C.sub.2-18 alkylene oxides, said poly(oxyalkylene) substituent having a pendant or terminal group selected from OH and NH.sub.2 and NHR.sub.2 wherein R.sub.2 is C.sub.1-18 alkyl, which forms an ester or amide linkage respectively with an acyl group of a residue of a cyclic acid anhydride, said residue of a cyclic acid anhydride having a pendant carboxyl group.
Dependencies are inferred from the claim text.