Stabilized thermoplastic composition, method of making, and articles formed therefrom
申请人:Glasgow Katherine
公开号:US20070082989A1
公开(公告)日:2007-04-12
A thermoplastic composition comprises a polycarbonate, an ionizing radiation stabilizing additive, and a poly-substituted aromatic compound of formula:
wherein X is an aryl group; Y is a non-hydrogen substituent group, a is 1 to 4, b is 0 to 4, a+b is less than or equal to 4, and c is 0 or 1; and wherein the amounts and identities of the polycarbonate, ionizing radiation stabilizing additive, and poly-substituted aromatic compound are selected such that a molded article having a thickness of 3.18 millimeters and comprising the thermoplastic composition has, after exposure to gamma radiation at 83 kGy and when measured according to ASTM D1925-70, an increase in yellowness index (dYI) of less than or equal to 50, when compared to the unexposed thermoplastic composition.
一种热塑性组合物包括聚碳酸酯、电离辐射稳定添加剂和式子为的多取代芳香族化合物:其中X是芳香族基;Y是非氢取代基团,a为1到4,b为0到4,a+b小于或等于4,c为0或1;并且聚碳酸酯、电离辐射稳定添加剂和多取代芳香族化合物的数量和身份被选择为这样的模制品,其厚度为3.18毫米,包含该热塑性组合物,在经过83 kGy的伽马辐射照射后,按照ASTM D1925-70测量,其黄度指数(dYI)增加小于或等于50,与未曝露的热塑性组合物相比。