Abstract: It is possible to enhance flowability of a polycarbonate resin during molding of the polycarbonate resin without impairment of inherent properties of the polycarbonate resin by blending a flowability enhancing agent and an antioxidant with the polycarbonate resin, the flowability enhancing agent including polyester which is a polycondensate of a monomer mixture, the monomer mixture being a mixture of monomers (A), (B), and (C), which are biphenol (A), bisphenol (B), and dicarboxylic acid (C), respectively, the monomer mixture containing the biphenol (A) in an amount of 0 mol % to 55 mol %, the bisphenol (B) in an amount of 5 mol % to 60 mol %, and the dicarboxylic acid (C) in an amount of 40 mol % to 60 mol %, with respect to 100 mol % of a total amount of the monomers (A), (B), and (C), and the polyester having terminals 60% or more of which are sealed with a terminal sealing agent having a number average molecular weight of not less than 160.

Abstract: It is possible to enhance flowability of a polycarbonate resin during molding of the polycarbonate resin without impairment of inherent properties of the polycarbonate resin by blending a flowability enhancing agent and an antioxidant with the polycarbonate resin, the flowability enhancing agent including polyester which is a polycondensate of a monomer mixture, the monomer mixture being a mixture of monomers (A), (B), and (C), which are biphenol (A), bisphenol (B), and dicarboxylic acid (C), respectively, the monomer mixture containing the biphenol (A) in an amount of 0 mol % to 55 mol %, the bisphenol (B) in an amount of 5 mol % to 60 mol %, and the dicarboxylic acid (C) in an amount of 40 mol % to 60 mol %, with respect to 100 mol % of a total amount of the monomers (A), (B), and (C), and the polyester having terminals 60% or more of which are sealed with a terminal sealing agent having a number average molecular weight of not less than 160.

Abstract: Provided is a polycarbonate resin composition containing a polycarbonate resin whose flowability during molding of the polycarbonate resin is enhanced, without loss of properties such as transparency, mechanical strength, and heat resistance, by adding, to the polycarbonate resin, a polycarbonate oligomer and a flowability enhancing agent which is obtained through polycondensation of a monomer mixture containing a bisphenol component and a dicarboxylic acid and, optionally, biphenol component. Further provided is a molded article obtained from the polycarbonate resin composition.

Abstract: A resin composition in accordance with an embodiment of the present invention includes an engineering resin, a graft copolymer, and a flowability enhancing agent which includes a polyester obtained through polycondensation of bisphenol and dicarboxylic acid and, optionally, biphenol in specific proportions. The resin composition has melt flowability improved without loss of an excellent plating property of the graft copolymer and without loss of an excellent property of the engineering resin.

Abstract: A method of improving flowability of polycarbonate or polyarylate includes mixing the polycarbonate or the polyarylate with a flowability improver including a polyester. The polyester is a polycondensate of monomers including a bisphenol component (B) and a dicarboxylic acid component (C) at a molar ratio satisfying (B):(C)=45:55-55:45. The polyester includes a portion derived from the bisphenol component (B) and the dicarboxylic acid component (C) in an amount of 50 mol % or more.

Abstract: A method of improving flowability of polycarbonate or polyarylate includes mixing the polycarbonate or the polyarylate with a flowability improver including a polyester. The polyester is a polycondensate of monomers including a bisphenol component (B) and a dicarboxylic acid component (C) at a molar ratio satisfying (B):(C)=45:55?55:45. The polyester includes a portion derived from the bisphenol component (B) and the dicarboxylic acid component (C) in an amount of 50 mol % or more.