Aqueous ink composition and colorants useful therein
AssigneeMilliken Research Corporation
InventorsPatrick D. Moore, Clifford R. King, Raj Batlaw
Life of this patent
Estimating the term…
Abstract
An aqueous ink composition is provided having up to 50 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.
Claims15
An aqueous ink composition comprising from 0.1 to 50 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 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;
- and
- a counter ion selected from alkali metal ions, alkaline earth metal ions, ammonium ions, zinc ammonium complexes and amine salts, wherein said counter ion is present in approximately stoichiometric proportion or greater relative to said colorant.
An aqueous ink composition comprising from 0.1 to 50 wt. % of a colorant characterized by an organic chromophore, having a polyoxyalkylene substituent of from 1 to 200 radicals of alkylene oxide radicals of C.sub.2-18 alkylene oxides;
- said polyoxyalkylene substituent having a pendant or terminal group selected from OH, 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 radical of a cyclic acid anhydride, said anhydride radical having a pendant carboxyl group;
- and
- a counter ion selected from alkali metal ions, alkaline earth metal ions, ammonium ions, zinc ammonium complexes and amine salts, wherein said counter ion is present in approximately stoichiometric proportion or greater relative to said colorant.
Dependencies are inferred from the claim text.