Derivatives of polyoxyalkyleneamines as cosolvents for aqueous ink jet inks

Claim 1

An aqueous ink jet ink composition comprising: (a) an aqueous carrier medium; (b) a colorant selected from the group consisting of a pigment dispersion and a dye; and (c) a cosolvent having a solubility in water of at least 4.5% at 25° C., and which is selected from the group consisting of: (1) Monocarboxamide, monosulfonamide, monourea and monothiourea derivatives of polyoxyalkylene monoamines having the following structure: R--Y--NR'CHXCH.sub.2 (OCHXCH.sub.2).sub.n OR" wherein R=--H or an alkyl group of 1-4 carbons; R'=--H, an alkyl group of 1-3 carbons, or an alkyl group of 1-4 carbons containing one hydroxyl group; X=--H or --CH 3 independently; n=1-200; R"=an alkyl group of 1-4 carbons; and Y is a divalent connecting group of atoms selected from the group consisting of: ##STR8## (2) Bis-carboxamide, bis-sulfonamide, bis-urea and bis-thiourea derivatives of polyoxyalkylenediamines having the following structure: R--Y--R'NCXCH.sub.2 (OCHXCH.sub.2).sub.n OCH.sub.2 CHXNR'--Y--R wherein R, R', X, and Y are as defined above; and n=2-400; (3) Tris-carboxamide, tris-sulfonamide, tris-urea and tris-thiourea derivatives of polyoxyalkylenetriamines having the following structure: ##STR9## wherein R, R', X, and Y are as defined above; n+p+q=3-500; and a=0 or 1; (4) Monourea, monosulfonamide and monothiourea derivatives of bis-polyoxyalkyleneamines having the following structure: R"O(CH.sub.2 CHXO).sub.n CH.sub.2 CHXNR'--Y--NR'CHXCH.sub.2 (OCHXCH.sub.2).sub.n OR" wherein R, R', and X are as defined above; n=1-200; R"=an alkyl group of 1-3 carbons; and Y is a divalent connecting group of atoms selected from the group of: ##STR10## (5) mixtures thereof.