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|1. (WO2017038580) THERMOPLASTIC POLYESTER RESIN COMPOSITION AND LIGHT REFLECTOR USING SAME|
|Applicants:||TOYOBO CO., LTD.
|Title:||THERMOPLASTIC POLYESTER RESIN COMPOSITION AND LIGHT REFLECTOR USING SAME|
The present invention is a thermoplastic polyester resin composition which is suitable for forming a light-reflecting surface of a light reflector, can provide a molded article having excellent surface smoothness and low fogging properties, and can also suppress mold staining during continuous molding. This thermoplastic polyester resin composition contains 100-50 parts by mass of a poly(butylene terephthalate) resin (A) and 0-50 parts by mass of a poly(ethylene terephthalate) resin (B), and contains 1-20 parts by mass of a surface treated calcium carbonate (C) having an average particle diameter of 0.05-2 µm and 0.05-3 parts by mass of a polyfunctional glycidyl group-containing styrene-based polymer (D) relative to a total of 100 parts by mass of the polyester resins contained in the resin composition.