Patent ID: 8598272

Claim:
A blend polymer composition, comprising: a styrene-based polymer; a non-styrene-based polymer; and a compatibilizer having a block copolymer that consists essentially of: a first block consisting of a first monomer unit which includes an unsaturated carboxylic acid glycidyl ester unit that has an epoxy group, and a second monomer unit which is free of an epoxy group, and which is selected from the group consisting of an acrylate-based monomer unit, a methacrylate-based monomer unit and a combination thereof; and a second block including a styrene-based monomer unit and an acrylonitrile-based monomer unit; wherein said block copolymer has an epoxy equivalent ranging from 1000 g/eq to 20000 g/eq and a molecular weight distribution index ranging from 1.0 to 2.0; and wherein said second block is free of an epoxy group.