Washable ink compositions
First Claim
1. A washable, aqueous ink composition for a color marking pen which comprises an ink composition having a viscosity of from about 1.0 to about 6.0 centipoises and from about 10% to about 50% by weight of one or more polymeric colorants of the formula:
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space="preserve" listing-type="equation">[(X).sub.d --(CHROM)--{[R.sub.1 (RO).sub.a Y].sub.b }.sub.c ]X.sub.d --(CHROM)--{R.sub.1 [(RO).sub.a --Y].sub.b }.sub.cwherein;
X is a polar group selected from sulfonic acids, sulfonic acid salts, sulfonamides, sulfonates, carboxylic acids, carboxylic acid salts, carboxylic acid amides, carboxylic aldehydes, ureas, thioureas, nitro groups, hydroxy groups, polyethers, and hydroxyalkylethers;
R is unsubstituted or substituted straight or branched alkylene of 2-4 carbons, or mixtures thereof;
Y is selected from H, alkanoyl, aroyl, alkoxycarbonyl, unsubstituted or substituted carbamoyl, diacetate, methyl or --CH2 CH(R2)--X;
R1 is selected from nitrogen, oxygen, sulfur, or a sulfurcontaining divalent linking group;
R2 is hydrogen or a lower alkyl group containing one to about five carbon atoms;
a is an integer of from 6 to about 40;
b and c are each independently selected from one or two;
d is an integer of from one to four;
the product of (a) (b) (c) is an integer of from 6 to about 40;
and CHROM is a chromophore selected from nitro, nitroso, monoazo, disazo and trisazo, diarylmethane, triarylmethane, xanthane, acridine, methine, thiazole, indamine, azine, oxazine, or anthraquinone, wherein the (RO)a moiety is bonded to a carbocyclic aromatic ring of the (CHROM) through R1.
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Abstract
A washable aqueous ink composition having a viscosity of from about 1.0 to about 6.0 centipoises and containing from about 10 to about 50% by weight of one or more polymeric colorants of the formula: ##STR1## wherein: X is a polar group such as sulfonic acids, sulfonic acid salts, sulfonamides, sulfonates or the like;
R is alkylene; Y is H, alkanoyl, carbamoyl, or the like;
R1 is nitrogen, oxygen, sulfur, or a sulfur-containing divalent linking group;
a is an integer of from six to about forty;
b and c are each independently selected from one or two;
d is an integer of from one to four; the product of (a) (b) (c) is an integer of from 6 to about 40;
and CHROM is a chromophore such as nitro, nitroso, monoaxo, disazo and trisazo, diarylmethane, triarylmethane, xanthane, acridine, methine, thiazole, indamine, azine, oxazine, or anthraquinone, wherein the (RO)a moiety is bonded to a carbocyclic aromatic ring of the (CHROM) through R1.
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Citations
20 Claims
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1. A washable, aqueous ink composition for a color marking pen which comprises an ink composition having a viscosity of from about 1.0 to about 6.0 centipoises and from about 10% to about 50% by weight of one or more polymeric colorants of the formula:
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space="preserve" listing-type="equation">[(X).sub.d --(CHROM)--{[R.sub.1 (RO).sub.a Y].sub.b }.sub.c ]X.sub.d --(CHROM)--{R.sub.1 [(RO).sub.a --Y].sub.b }.sub.cwherein; X is a polar group selected from sulfonic acids, sulfonic acid salts, sulfonamides, sulfonates, carboxylic acids, carboxylic acid salts, carboxylic acid amides, carboxylic aldehydes, ureas, thioureas, nitro groups, hydroxy groups, polyethers, and hydroxyalkylethers; R is unsubstituted or substituted straight or branched alkylene of 2-4 carbons, or mixtures thereof; Y is selected from H, alkanoyl, aroyl, alkoxycarbonyl, unsubstituted or substituted carbamoyl, diacetate, methyl or --CH2 CH(R2)--X; R1 is selected from nitrogen, oxygen, sulfur, or a sulfurcontaining divalent linking group; R2 is hydrogen or a lower alkyl group containing one to about five carbon atoms; a is an integer of from 6 to about 40; b and c are each independently selected from one or two; d is an integer of from one to four;
the product of (a) (b) (c) is an integer of from 6 to about 40;and CHROM is a chromophore selected from nitro, nitroso, monoazo, disazo and trisazo, diarylmethane, triarylmethane, xanthane, acridine, methine, thiazole, indamine, azine, oxazine, or anthraquinone, wherein the (RO)a moiety is bonded to a carbocyclic aromatic ring of the (CHROM) through R1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification