Patent ID: 6433117
Filing Date: 2002-08-13
Classification: C08F,C09D

Abstract:
An aqueous ink jet ink comprising an aqueous carrier, a colorant and a dispersant, wherein the dispersant comprises a copolymer obtained from at least one polymerized monomer having the general structure:CH2&boxH;C(R3)C(O)OXa(C2H4))bâ€”(C3H6O)câ€”R4 where a=0 or 1; when a=1, X is an akyl, aryl, or alkaryl diradical connecting group of 1-9 carbon atoms; b and c are independently selected from the range of 0-100 provided that b and c are not simultaneously 0; R3 is H or CH3; and R4 is selected from the group consisting of PO3H2, an alcohol group and an epoxy group, provided that if R4 is not PO3H2, then said copolymer has been treated with a phosphorylating agent to form one or more phosphate functionalities where the epoxy group(s) or the alcohol group(s) use to be.