abstract |
a first alkyl acrylate polymer having an average particle diameter of 4,000 to 6,000 Å; a second alkyl acrylate polymer having an average particle diameter of 500 to 1,800 Å; and an aromatic vinyl monomer unit and an unsaturated nitrile monomer unit, including a third polymer grafted to the first and second alkyl acrylate polymers, and a method for producing the same. |