Cabot Corporation
ACRYLIC POLYMERS FOR INKJET INK APPLICATIONS

Abstract:

Disclosed herein are inkjet ink compositions comprising: at least one pigment having attached at least one organic group having a calcium index value greater than a calcium index value of 1,2,3-benzene tricarboxylic acid; at least one acrylic polymer having an acid number of at least 150 KOH/g and a weight average molecular weight ranging from 1,000 to 15,000, wherein the at least one acrylic polymer is at least partially neutralized with a base having the following structure: wherein: A is a C.sub.2-C.sub.12 alkyl, R.sup.1 is selected from H, C.sub.1-C.sub.12 alkyl, an amine having the formula --NR.sup.3R.sup.4, and a guanidine residue having the formula --N(R.sup.5)--C(.dbd.NH)--N(R.sup.6)(R.sup.7), wherein R.sub.3 to R.sup.7 are independently selected from H and C.sub.1-C.sub.12 alkyl, and R.sup.2 is selected from H, C.sub.1-C.sub.12 alkyl, and an acid group. The inkjet ink composition further comprises an aqueous liquid medium. ##STR00001##