Patent ID: 7754784
Filing Date: 2010-07-13
Classification: C08F,C09D

Abstract:
1. An oil-based ink composition for inkjet printers, comprising a fixing polymer and a solvent, said fixing polymer being an acrylic polymer obtained by subjecting an acrylic monomer to solution polymerization with a radical polymerization initiator in said solvent, wherein said solvent is at least one solvent selected from the group consisting of ethylene glycol monobutyl ether acetate and diethylene glycol monobutyl ether acetate; said radical polymerization initiator is at least one organic peroxide selected from the group consisting of organic peroxides of the peroxyester, dialkyl peroxide, diacyl peroxide and peroxyketal type; the ratio (v/u) of said radical polymerization initiator (v) to said acrylic monomer (u) is from 0.1/100 to 20/100 by weight; said fixing polymer comprises a reaction product of an acrylic polymer with molecules of said solvent bonded to one end of said acrylic polymer; and wherein said fixing polymer is selected from the group consisting of a homopolymer of methyl methacrylate and a copolymer between methyl methacrylate (x) and at least one monomer (y) selected from the group consisting of butyl methacrylate, ethoxyethyl methacrylate and benzyl methacrylate, and a copolymerization ratio (y/x) of said copolymer being from 0.01/100 to 60/100 by weight.