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公开(公告)号：US20200055974A1
公开(公告)日：2020-02-20
申请号：US16347072
申请日：2017-11-06
发明人： Toru TAKAHASHI , Daigo NAKAYA , Kensuke OSHIMA , Daisuke SUNAGA
IPC分类号： C08G2/24
摘要： The present invention addresses the problem of providing a method for producing an oxymethylene copolymer, which is capable of producing an oxymethylene copolymer having a high molecular weight with high yield and high economic efficiency. This problem is able to be solved by a method for producing an oxymethylene copolymer, in which a copolymer starting material containing a trioxane and a comonomer is subjected to a polymerization reaction in the presence of a polymerization initiator that contains an acidic compound (A), and wherein: the copolymer starting material contains a basic compound (B); an acidic compound (C) that is different from the acidic compound (A) is added into the copolymer starting material before performing the polymerization reaction, thereby causing a reaction between the basic compound (B) and the acidic compound (C) in advance; and the polymerization reaction is carried out by means of melt polymerization.
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公开(公告)号：US20160369050A1
公开(公告)日：2016-12-22
申请号：US14901783
申请日：2014-06-30
发明人： Daigo NAKAYA , Toru TAKAHASHI , Satoshi MOCHIDA
IPC分类号： C08G65/10 , C08K5/3492 , C08K5/13 , C08G65/30
CPC分类号： C08G65/10 , C08G2/04 , C08G2/06 , C08G2/10 , C08G2/24 , C08G65/30 , C08K5/13 , C08K5/3492 , C08L59/04
摘要： The present invention provides a method for producing an oxymethylene copolymer which involves polymerizing trioxane and a comonomer cationically at a polymerization temperature of 135° C. to 300° C. in the presence of a protic acid salt having the molecular weight of 1000 or less, and at least one polymerization initiator selected from the group consisting of protic acids, protic acid anhydrides, and protic acid ester compounds having the molecular weight of 1000 or less.
摘要翻译： 本发明提供一种生产甲醛共聚物的方法，其包括在135℃至300℃的聚合温度下，在分子量为1000以下的质子酸盐存在下，使三恶烷和共聚单体阳离子聚合， 和选自分子量为1000以下的质子酸，质子酸酐和质子酸酯化合物的至少一种聚合引发剂。
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公开(公告)号：US20180265617A1
公开(公告)日：2018-09-20
申请号：US15532266
申请日：2015-12-01
发明人： Daigo NAKAYA , Toru TAKAHASHI , Satoshi MOCHIDA , Kensuke OSHIMA
摘要： The invention provides a method for producing an oxymethylene copolymer including a polymerization step for cationically polymerizing trioxane and a comonomer at a polymerization temperature of from 135 to 300° C. in the presence of at least one salt of a protonic acid having a molecular weight of 1,000 or less, and at least one polymerization initiator selected from the group consisting of protonic acids having a molecular weight of 1,000 or less, protonic acid anhydrides having a molecular weight of 1,000 or less, and protonic acid ester compounds having a molecular weight of 1,000 or less; wherein the total concentration of metal components contained in the trioxane and comonomer used in the polymerization step is 300 ppb by mass or less.
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