Method of producing an improved polyacetal polymer

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United States of America Patent

PATENT NO 4540773
SERIAL NO

06649452

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Abstract

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A crude polyacetal polymer obtained by polymerization or copolymerization and having as a principal component thereof connected oxymethylene radicals in a main chain is treated in a non-soluble liquid medium at temperatures higher than 80.degree. C. but lower than the melting point of the polymer and at heterogeneous equilibrium, moving the crude polymer and the non-soluble medium in opposite directions relative to each other.

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Patent Owner(s)

Patent OwnerAddress
POLYPLASTICS CO LTD2-18-1 KONAN MINATO-KU TOKYO 1088280 ?1088280

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gotoh, Noboru Fujinomiya, JP 2 59
Higashiyama, Seiichi Fuji, JP 2 8
Hotta, Hiroshi Fuji, JP 22 154
Komazawa, Hiroyasu Fuji, JP 2 3
Nakashima, Tuneyasu Kawasaki, JP 3 5
Nakatsuji, Hiroshi Fuji, JP 22 183
Yoko, Kiyoshi Fujinomiya, JP 1 1

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