A large sized thin-walled shaped article having a complicated shape can be realized by improving fluidity at the time of shaping without deterioration of the intrinsic characteristic properties of an aromatic polycarbonate resin, namely, transparency, resistance to exfoliation of surface layer, thermal resistance, impact resistance, and chemical resistance. Specifically disclosed is a fluidity-improving agent containing 0.5 to 99.5 parts by mass of a polymer (A) which is obtained by polymerizing a monomer mixture (a) containing 0.5 to 99% by mass of (a1) an aromatic vinyl monomer, 0.5 to 99% by mass of (a2) a phenyl (meth)acrylate or a phenyl (meth)acrylate having a substituent in a phenyl group, and 0.5 to 5% by mass of (a3) a vinyl monomer having a functional group (X), and 0.5 to 99.5 parts by mass of a polymer (B) which is obtained by polymerizing a monomer mixture (b) comprising (bl) a phenyl (meth)acrylate or a phenyl (meth)acrylate having a substituent in a phenyl group with a compound having a functional group (Y) capable of reacting with the functional group (X), with the proviso that a total of the polymer (A) and the polymer (B) is 100 parts by mass.
通过在成型时提高流动性,可以实现具有复杂形状的大型薄壁成型品,而不会降低芳香族聚
碳酸酯
树脂的固有特性,即透明度、表层抗剥离性、耐热性、抗冲击性和耐
化学性。具体地说,本发明公开了一种流动性改进剂,它含有 0.5 至 99.5 质量份的聚合物 (A),该聚合物是通过聚合单体混合物 (a) 而得到的,单体混合物 (a) 含有 0.5 至 99% 的芳香族
乙烯基单体 (a1)、0.5%至 99%(质量份)的(a2)苯基(甲基)
丙烯酸酯或在苯基中具有取代基的苯基(甲基)
丙烯酸酯,以及 0.5%至 5%(质量份)的(a3)具有官能团(X)的
乙烯基单体,和 0.5至99.5质量份的聚合物(B),该聚合物(B)由单体混合物(b)聚合而成,单体混合物(b)包括(bl)苯基(甲基)
丙烯酸酯或在苯基中具有取代基的苯基(甲基)
丙烯酸酯,以及具有能与官能团(X)反应的官能团(Y)的化合物,但聚合物(A)和聚合物(B)的总质量份数为100质量份。