Provided are a graft copolymer which has good moldability and good continuous moldability and with which a thermoplastic resin molded article having excellent impact resistance can be produced, a method for producing the graft copolymer, and a thermoplastic resin composition including the graft copolymer. A graft copolymer (B-I) produced by grafting at least one vinyl monomer (b-I) selected from the group consisting of an aromatic vinyl, an alkyl (meth)acrylate, and a vinyl cyanide to a rubbery polymer mixture including a rubbery polymer (A-I) and a hydrophobic substance, the rubbery polymer (A-I) including an alkyl (meth)acrylate unit and a multifunctional monomer unit copolymerizable with the alkyl (meth)acrylate, the hydrophobic substance having a kinematic viscosity of 5 mm2/s or more at 40°C or a kinematic viscosity of 2 to 4 mm2/s at 100°C, a principal constituent of the hydrophobic substance being a hydrocarbon. A thermoplastic resin composition including the graft copolymer (B-I). A molded article produced using the thermoplastic resin composition.
本发明提供了一种接枝共聚物,该接枝共聚物具有良好的成型性和良好的连续成型性,使用该接枝共聚物可以生产出具有优异抗冲击性的热塑性
树脂成型品;还提供了一种生产该接枝共聚物的方法,以及一种包括该接枝共聚物的热塑性
树脂组合物。一种接枝共聚物(B-I),通过将至少一种选自芳香族
乙烯基、(甲基)
丙烯酸烷基酯和
乙烯基氰化物的
乙烯基单体(b-I)接枝到橡胶聚合物混合物(包括橡胶聚合物(A-I)和疏
水性物质)中而制得、橡胶聚合物(A-I)包括烷基(甲基)
丙烯酸酯单元和可与烷基(甲基)
丙烯酸酯共聚的多功能单体单元,疏
水性物质在 40°C 时的运动粘度为 5 mm2/s 或以上,或在 100°C 时的运动粘度为 2 至 4 mm2/s,疏
水性物质的主要成分为碳氢化合物。包括接枝共聚物(B-I)的热塑性
树脂组合物。使用该热塑性
树脂组合物生产的模塑制品。