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1. 发明申请

WO1995027747A1 PROCESS FOR PRODUCING STABILIZED OXYMETHYLENE COPOLYMER 审中-公开
标题翻译：生产稳定的甲基苯乙烯共聚物的方法
公开(公告)号：WO1995027747A1
公开(公告)日：1995-10-19
申请号：PCT/JP1995000579
申请日：1995-03-28
申请人： ASAHI KASEI KOGYO KABUSHIKI KAISHA , TANIMURA, Noritaka , TANIGAWA, Yukio , KOMATU, Sumio
发明人： ASAHI KASEI KOGYO KABUSHIKI KAISHA
IPC分类号： C08G02/18
CPC分类号： C08G2/18
摘要： A process for producing a stabilized oxymethylene copolymer which comprises polymerizing trioxane and a cyclic ether and/or a cyclic formol into an oxymethylene copolymer in the presence of at least one polymerization catalyst selected from the group consisting of boron trifluoride, boron trifluoride hydrate and coordination complex compounds formed between boron trifluoride and organic oxygen or sulfur compounds, evaporating part of the catalyst by heating the reaction system at a temperature below the melting point of the catalyst in an inert gas atmosphere and/or by reducing the pressure of the reaction system without deactivating the catalyst, and stabilizing the molecular ends either after deactivating the remaining catalyst or directly. By reducing the content of the polymerization catalyst remaining in the oxymethylene copolymer, the obtained copolymer is excellent in thermal stability and is reduced in the emission of formaldehyde odor during melt molding.
摘要翻译：一种稳定化的甲醛共聚物的制造方法，其特征在于，在选自三氟化硼，三氟化硼水合物和配位络合物中的至少一种聚合催化剂的存在下，将三恶烷和环状醚和/或环状甲醛聚合成甲醛共聚物在三氟化硼和有机氧或硫化合物之间形成的化合物，通过在惰性气体气氛中在低于催化剂熔点的温度下加热反应体系和/或通过降低反应体系的压力而不停用来蒸发催化剂的一部分催化剂，以及在使剩余的催化剂失活或直接使催化剂稳定之后稳定分子末端。通过降低残留在甲醛共聚物中的聚合催化剂的含量，所得共聚物的热稳定性优异，并且在熔融成型期间甲醛气味的排放减少。

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