申请人:POLYPLASTICS CO. LTD.
公开号:EP0435649A1
公开(公告)日:1991-07-03
A polyoxymethylene resin composition having improved thermal stability is provided by a composition containing, based on the weight of the polyoxymethylene, 0.01 to 5% by weight of a hindered phenol antioxidant and 0.01 to 5% by weight of an amine polymer having a molecular weight of at least 1000 and comprising structural units of the following formula (1):
wherein R represents a hydrogen atom, an alkyl group, a phenyl group, an alkyl-substituted phenyl group or
and X represents an alkylene group, a carbonyl group, a carboxyalkylene group, an alkyleneoxycarbonylalkyl group, a phenylene group, an alkyl-substituted phenylene group, an amido group or an alkyleneamido group, or X may be null in some cases.
一种具有更高热稳定性的聚甲醛树脂组合物是由这样一种组合物提供的:以聚甲醛的重量为基准,含有 0.01 至 5%(按重量计)的受阻酚抗氧化剂和 0.01 至 5%(按重量计)的胺聚合物,其分子量至少为 1000,并包含下式(1)的结构单元:
其中 R 代表氢原子、烷基、苯基、烷基取代的苯基或
而 X 代表亚烷基、羰基、羧基亚烷基、亚烷氧基羰基亚烷基、亚苯基、烷基取代的亚苯基、氨基或亚烷基氨基,或在某些情况下 X 可以为空。