| 摘要 |
POLYACETAL COMPOSITIONS CONTAINING AT LEAST ONE OXO-PIPERAZINYL-TRIAZINE HINDERED AMINE LIGHT STABILIZER Polyacetal compositions containing 0.05 to 5 weight percent of an oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N4 atom in the piperazinone ring of the stabilizer is alkylated with a methyl, ethyl, or propyl group, said compositions being relatively stable upon exposure to UV light. A polyacetal composition containing a specific oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N4 atom is not alkylated is shown to be relatively stable upon exposure to UV light. Both compositions possess stability during melt processing and do not significantly lose physical properties upon exposure to heat and light. AD-5872
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