THICKENERS FOR THERMOPLASTIC POLYESTER RESINS, THERMOPLASTIC POLYESTER RESIN COMPOSITIONS CONTAINING THE SAME, AND MOLDINGS OF THE COMPOSITIONS

摘要

The present invention provides a viscosity modifier (A) for thermoplastic polyester resin obtainable by polymerizing (a) 70 to 95% by weight of an aromatic vinyl monomer, (b) 5 to 30% by weight of an alkyl acrylate having an alkyl group with 1 to 8 carbon atoms, and (c) 0 to 10% by weight of other vinyl monomers copolymerizable with both; a viscosity modifier (A') for thermoplastic polyester resin characterized by covering 100 parts by weight of polymer particles (A-1) with 0.5 to 30 parts by weight of polymer particles (A-2), the polymer particle (A-1) are obtained by polymerizing (a) 70 to 95% by weight of an aromatic vinyl monomer, (b) 5 to 30% by weight of an alkyl acrylate having an alkyl group with 1 to 8 carbon atoms, and (c) 0 to 10% by weight of other vinyl monomers copolymerizable with both and having a glass transition temperature of 60°C or higher and a volume-average particle diameter of 50 to 500 µm, and the polymer particles (A-2) have volume-average particle diameter of 0.01 to 0.5 µm; and a thermoplastic polyester resin composition and a molded article containing the viscosity modifier.