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公开(公告)号:US06433128B1
公开(公告)日:2002-08-13
申请号:US09855781
申请日:2001-05-16
申请人: Takahiro Nakamura , Akira Okamura , Masanori Furukawa , Isamu Masumoto , Kaneo Yoshioka , Kazumasa Maji
发明人: Takahiro Nakamura , Akira Okamura , Masanori Furukawa , Isamu Masumoto , Kaneo Yoshioka , Kazumasa Maji
IPC分类号: C08G1002
摘要: A process for producing an oxymethylene copolymer by polymerizing trioxan and 1,3-dioxolan in the presence of a cationically active catalyst, wherein (1) 1,3-dioxolan is used in an amount of 0.01 to 2.9 mol % based on trioxan; and (2) the cationically active catalyst is used in an amount of 1×10−7 to 1.2×10−4 mol based on 1 mol of trioxan. The process of the present invention makes it possible to obtain at a high yield an oxymethylene copolymer which has almost as high mechanical strength and stiffness as an oxymethylene homopolymer while retaining the tenacity and heat stability of an oxymethylene copolymer.