Molding made from a vinylidene fluoride copolymer and process for its production
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United States of America Patent
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Oct 8, 1991
Grant Date -
N/A
app pub date -
May 11, 1989
filing date -
May 13, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A molding is produced by thermoplastic shaping of at least one partially crystalline polymer which comprises, exclusively, polymerized units of vinylidene fluoride and other fluorine-containing monomers which contain only one C.dbd.C double bond, contains 20 to 50% by weight of polymerized units of vinylidene fluoride and has a melt index of at least 1 g/10 min at 250.degree. C. and 11 kg load, without addition of substances which contain polymerizable double bonds, and the molding is subsequently treated with a minimum dose of 50 kGY of ionizing rays at a minimum dose rate of 2 Gy/s. Moldings are thus obtained in a simple manner which have good mechanical and chemical properties and exhibit no discoloration.
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