Patent ID: 6020400
Filing Date: 2000-02-01
Classification: C09D,Y10S

Abstract:
An ink jet ink comprising:(a) an aqueous carrier medium;(b) a colorant; and(c) an additive consisting essentially of a mixture of an emulsion polymer and a structured polymer selected from the group consisting of block polymers and graft polymers, wherein the emulsion polymer comprises monomers selected from the group consisting of:(1) acrylic and methacrylic monomers; vinyl monomers; maleic acid; maleic anhydride; styrene; itaconic acid; N-vinyl pyrrolidone; acrylamides; and methacrylamides;(2) hydrophilic monomer having the formula CH.sub.2 .dbd.C(X)(Y)', wherein X is H or CH.sub.3 and Y' is C(O)OH, C(O)NR.sub.2 R.sub.3, C(O)OR.sub.4 NR.sub.2 R.sub.3, C(O)OR.sub.5, or their salts, wherein R.sub.2 and R.sub.3 may be H or C1 to C9 alkyl, aryl, or alkylaryl, R.sub.4 is a C1 to C5 alkyl diradical, and R.sub.5 is a C1 to C20 alkyl diradical which may contain hydroxy or ether groups; and(3) crosslinking monomer.