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|1. (WO2017038581) POLYESTER RESIN COMPOSITION, LIGHT-REFLECTOR COMPONENT CONTAINING SAME, AND LIGHT REFLECTOR|
|Applicants:||TOYOBO CO., LTD.
|Title:||POLYESTER RESIN COMPOSITION, LIGHT-REFLECTOR COMPONENT CONTAINING SAME, AND LIGHT REFLECTOR|
The present invention provides a polyester resin composition that is suitable for forming a light-reflecting surface of a light reflector, that has a high heat resistance and low gaseous properties, and with which it is possible to considerably suppress metal-mold contamination when continuously performing molding, wherein the polyester resin composition contains: a polyester resin A containing 50 to 100 % by mass of a polybutylene terephthalate resin and 0 to 50 % by mass of a polyethylene terephthalate resin; metal organic-acid salts B that include one of or both of alkaline-metal organic-acid salts and alkaline-earth-metal organic-acid salts; a predetermined amount of a multifunctional glycidyl-group-containing styrene-based polymer C; and an inorganic filler D having an average particle size of 0.05 to 3 μm. The polyester resin composition contains a predetermined amount of alkaline-metal atoms/alkaline-earth-metal atoms, and the amount in which linear oligomers of polybutylene terephthalate are contained or the amount in which linear oligomers of polybutylene terephthalate and polyethylene terephthalate are contained is equal to or less than 1000 mg/kg.