Patent ID: 6364476
Filing Date: 2002-04-02
Classification: B41M,C09D

Abstract:
An ink jet printing process for improving the dye density and fixability of an ink jet image comprising:a) providing an ink jet recording element comprising a support having thereon an image-recording layer comprising a mixture of an anionic, addition polymer and a hydrophilic polymer; and b) applying droplets of a liquid ink on said image-recording layer in an image-wise manner, said ink comprising water, humectant and a water-soluble cationic or basic dye; said anionic, addition polymer having the formula wherein:R1 represents H, CH3 or CH2CO2R4; R2 represents H or CO2R4; R3 represents CO2R4, PO3(R4)2, Ar(CO2R4)x, Ar(SO3R4)x, Ar(O R4)y(SO3R4)x, Ar(PO3(R4)2)x, CO2â€”R5â€”CO2R4, CO2â€”R5â€”SO3R4, CO2â€”R5â€”PO3(R4)2, COâ€”NHâ€”R5â€”CO2R4, COâ€”NHâ€”R5â€”SO3R4, COâ€”NHâ€”R5â€”PO3(R4)2; R4 represents H, an alkali or alkaline earth metal ion, or an ammonium or substituted ammonium ion; x and y each independently represents an integer from 0 to 3; Ar represents an aryl group of from about 6 to about 10 carbon atoms or a hetaryl group of from about 5 to about 10 atoms; and R5 represents a straight-chain or branched alkyl, aryl or alkylene oxide group having 10 carbon atoms or less; Z represents at least one ethylenically unsaturated monomer; m represents a mole % of from about 5 to about 100; and n represents a mole % of from about 95 to 0.