Process for improving the stability of etherified acetal homopol

Details Process for improving the stability of etherified acetal homopol Process for improving the stability of etherified acetal homopol

1978-01-17

1979-06-12

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From aldehyde or derivative thereof as reactant

260 457R, 528488, C08G 236

Patent

active

041580915

ABSTRACT:
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.

REFERENCES:
patent: 3640945 (1972-02-01), Ricker et al.
patent: 4024105 (1977-05-01), Sextro et al.

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