申请人:Mitsubishi Engineering-Plastics Corporation
公开号:EP2048199A1
公开(公告)日:2009-04-15
A polyester resin composition for light reflector base, causing only a small amount of outgas in the process of molding a light reflector base or producing a light reflector, excellent in adhesiveness with a metal film layer provided to the surface of the light reflector base, and capable of keeping high luminance even when exposed under high-temperature atmospheres will be provided. The polyester resin composition for light reflector base of the present invention, on the surface of which a light reflecting layer is provided, contains (A) 100 parts by weight of polyester resin, and (B) 0.05 to 2 parts by weight of modified polyolefin resin having a weight-average molecular weight of 2,000 or larger, and an acid value of larger than 1 mg KOH/g and smaller than 10 mg KOH/g.
本发明将提供一种用于光反射器底座的聚酯树脂组合物,在光反射器底座的成型或光反射器的生产过程中仅产生少量废气,与光反射器底座表面的金属膜层的粘合性极佳,即使暴露在高温环境下也能保持高亮度。本发明的用于光反射器基底的聚酯树脂组合物,在其表面设置了光反射层,该组合物包含 (A) 100 份(按重量计)聚酯树脂和 (B) 0.05 至 2 份(按重量计)改性聚烯烃树脂,改性聚烯烃树脂的重量平均分子量为 2,000 或更大,酸值大于 1 毫克 KOH/g,小于 10 毫克 KOH/g。