Method of producing polyacetal polymer showing improved heat resistance and moldability
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United States of America Patent
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Nov 11, 1986
Grant Date -
N/A
app pub date -
Sep 11, 1984
filing date -
Sep 16, 1983
priority date (Note) -
Expired
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Abstract
After crude polyacetal polymers mainly comprising bonded oxymethylene groups in the main chain thereof were once molten, they are heated at temperatures of 80.degree. C. or above in liquid mediums, in which said crude polyacetal polymers are insoluble, with keeping a heterogeneous system after they were once molten.
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