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US3974239A Manufacture of impact-resistant olefinic-nitrile copolymers 失效
耐冲击烯烃 - 腈共聚物的制造

Manufacture of impact-resistant olefinic-nitrile copolymers
摘要:
Impact-resistant polymers which have low permeability to gases and vapors are prepared by polymerizing an olefinic nitrile, such as acrylonitrile, optionally with an acrylic ester, such as methyl acrylate, to at least about 70% conversion, and then introducing into the polymerization reaction medium a conjugated diene monomer, such as butadiene-1,3, and completing the polymerization reaction in the presence of said diene monomer.
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