Method of producing polyacetal polymer showing improved heat res

Details Method of producing polyacetal polymer showing improved heat res Method of producing polyacetal polymer showing improved heat res

1984-09-11

1986-11-11

Phynes, Lucille M.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528480, 528488, 528493, 528494, 528495, 528499, 528503, C08G 228

Patent

active

046223851

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.

REFERENCES:
patent: 3275593 (1966-09-01), Querfurth
patent: 3371066 (1968-02-01), Grundmann et al.
patent: 4151346 (1979-04-01), Sextro et al.
patent: 4158091 (1979-06-01), Radici et al.
patent: 4458064 (1984-07-01), Chatterjee

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