Patent ID: 6127453
Filing Date: 2000-10-03
Classification: C08F,C09D

Abstract:
An ink jet ink composition comprising from about 0.5% to about 30% by weight of a pigment, a carrier and a hydrophobically capped oligomeric acrylamide dispersant in a ratio of dispersant:pigment from about 0.1:1 to about 5:1, said hydrophobically capped oligomeric acrylamide dispersant having the formula (I): ##STR14## wherein each R.sub.1 and R.sub.2 independently represents a linear or branched alkyl alkenyl or arylalkyl group havinz from 1 to about 30 carbon atoms, with the sum of R.sub.1 and R.sub.2 comprising from about 8 to about 50 carbon atoms;each R.sub.3 independently represents hydrogen or a methyl group;each X independently represents hydrogen or an alkyl group containing up to about 4 carbon atoms;each Y independently represents hydrogen or an alkyl group containing up to about 4 carbon atoms or a hydroxylated or sulfonated alkyl group containing up to about 4 carbon atoms;Y' represents an alkyl group containing up to about 4 carbon atoms or a hydroxylated or sulfonated alkyl group containing up to about 4 carbon atoms,each Z independently represents oxygen, NH, NR.sub.1 or S;m is an integer of from about 2 to about 80;n is an integer of from 0 to about 80; andp is an integer of from about 1 to about 6.