发明授权
- 专利标题： Process for producing oxymethylene copolymer
- 专利标题（中）： 生产甲醛共聚物的方法
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申请号： US85578101申请日： 2001-05-16
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公开(公告)号： US6433128B2公开(公告)日： 2002-08-13
- 发明人: NAKAMURA TAKAHIRO , OKAMURA AKIRA , FURUKAWA MASANORI , MASUMOTO ISAMU , YOSHIOKA KANEO , MAJI KAZUMASA
- 申请人： MITSUBISHI GAS CHEMICAL CO
- 优先权： JP2000150053 2000-05-22; JP2000150054 2000-05-22
- 主分类号： C08G2/10
- IPC分类号： C08G2/10 ; C08G6/00 ; C08G10/02
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 1x10-7 to 1.2x10-4 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.