Motor vehicle components are provided having an improved stability at moderate temperatures and shaped from polyvinyl chloride resin compositions, comprising a polyvinyl chloride resin, at least one heat stabilizer in a sufficient amount to impart heat processing stability, and a S-diketone in a sufficient amount to provide, after forming, stability at moderate temperatures not provided by any residual heat stabilizer, as well as polyvinyl chloride resin stabilizer compositions and polyvinyl chloride resin compositions containing such heat stabilizer compositions suitable for use in forming motor vehicle components, comprising at least one heat stabilizer and a β-diketone.
本发明提供了在中等温度下具有更高的稳定性并由聚
氯乙烯树脂组合物成型的汽车部件,聚
氯乙烯树脂组合物包括聚
氯乙烯树脂、至少一种足够量的热稳定剂以赋予热加工稳定性,以及一种足够量的S-二酮以在成型后提供任何残余热稳定剂所不提供的中等温度下的稳定性,以及聚
氯乙烯树脂稳定剂组合物和含有这种热稳定剂组合物的聚
氯乙烯树脂组合物、以及聚
氯乙烯树脂稳定剂组合物和含有此类热稳定剂组合物的聚
氯乙烯树脂组合物,适用于汽车部件的成型,该组合物包含至少一种热稳定剂和一种
β-二酮。