The resistance to oxidative degradation of polyolefin compositions containing 5 to 50 % by weight of talc and a phenolic antioxidant is improved by adding to the composition a stabilizing amount of poly TDP which is a polyester having an average molecular weight of from about 500 to about 4,000, and having the repeating unit
wherein R is selected from divalent radicals such as 1,1-cyclohexanedimethylene; 1,2-cyclohexanedimethylene; 1,3-cyclohexanedimethylene; and 1,4-cyclohexanedimethylene; and preferably being at least partially chain-terminated with a compound such as methanol, ethanol and butanol or acids or their anhydrides such as acetic, butyric and isobutyric acid.
在含有 5%至 50%(按重量计)
滑石粉和
酚类抗氧化剂的聚烯烃组合物中加入稳定量的聚 TDP,可提高该组合物的抗氧化降解性能,聚 TDP 是一种聚酯,其平均分子量约为 500 至 4000,具有以下重复单元
其中 R 选自二价基,如 1,1-
环己烷二甲亚基;1,2-
环己烷二甲亚基;1,3-
环己烷二甲亚基;和 1,4-
环己烷二甲亚基;最好至少部分以
甲醇、
乙醇和
丁醇等化合物或
乙酸、
丁酸和
异丁酸等酸或其酸酐为链端。