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US4158091A Process for improving the stability of etherified acetal homopolymers 失效
提高醚化缩醛均聚物稳定性的方法

Process for improving the stability of etherified acetal homopolymers
摘要:
The thermal and chemical stability of etherified acetal homopolymers is improved by heat-treating the latter in the molten state at a temperature of at least 180.degree. C., in the presence of a halide of an alkali or alkaline earth metal, until substantially complete degradation of the unstable polyoxymethylene chains.
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