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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。

2. 发明申请

WO1996013534A1 PROCESS FOR PRODUCING POLYOXYMETHYLENE 审中-公开
标题翻译：生产聚氧乙烯的方法
公开(公告)号：WO1996013534A1
公开(公告)日：1996-05-09
申请号：PCT/JP1995002161
申请日：1995-10-20
申请人： ASAHI KASEI KOGYO KABUSHIKI KAISHA , TANIGAWA, Yukio , MATSUMOTO, Hiromasa
发明人： ASAHI KASEI KOGYO KABUSHIKI KAISHA
IPC分类号： C08G02/10
CPC分类号： B01J19/20 , B01J2219/00182 , B01J2219/182 , B29K2071/02 , C08G2/10
摘要： A process for producing polyoxymethylene by using a reactor wherein trioxane alone or a mixture thereof with a compound which can react with trioxane is fed through a feed port and the formed powdery polyoxymethylene is continuously recovered through a discharge port equipped with a weir. The weir serves to prolong the residence of the reactants in the reactor to thereby improve monomer conversion.
摘要翻译：通过使用反应器生产聚甲醛的方法，其中单独的三恶烷或其与可与三恶烷反应的化合物的混合物通过进料口进料，并且所形成的粉状聚甲醛通过装备有堰的排出口连续回收。堰用于延长反应物在反应器中的停留，从而提高单体转化率。

3. 发明申请

WO1995025761A1 METHOD OF STABILIZING MOLECULAR ENDS OF OXYMETHYLENE COPOLYMER 审中-公开
标题翻译：稳定聚乙烯共聚物分子末端的方法
公开(公告)号：WO1995025761A1
公开(公告)日：1995-09-28
申请号：PCT/JP1995000530
申请日：1995-03-22
申请人： ASAHI KASEI KOGYO KABUSHIKI KAISHA , TANIGAWA, Yukio , MORISHITA, Hirohisa
发明人： ASAHI KASEI KOGYO KABUSHIKI KAISHA
IPC分类号： C08G02/30
CPC分类号： B29C47/402 , B01J19/20 , B29C47/0009 , B29C47/38 , B29C47/605 , C08G2/30
摘要： A method of stabilizing the molecular ends of an oxymethylene copolymer with the use of an extruder comprising a casing provided with feed and delivery ports and at least two longitudinally extending rotating shafts, the extruder being provided, in the inside, with a melting zone, an end-stabilizing reaction zone and a devolatilizing zone in this order from the feed port toward the delivery port and further provided, in the area having a length of 2-15D (D being the inner diameter of the casing) in the end-stabilizing reaction zone, with a number of kneading elements having a thickness of 0.1-0.3D fixed to the rotating shafts in the longitudinal direction thereof in order to knead a crude oxymethylene copolymer in a molten state in the presence of a basic substance in the above reaction zone to thereby decompose the unstable molecular ends of the crude copolymer. The method enables the molecular ends of a crude oxymethylene copolymer to be stabilized in a short time efficiently and substantially completely.
摘要翻译：使用挤出机稳定甲醛共聚物的分子末端的方法，所述挤出机包括具有进料和输送口的壳体和至少两个纵向延伸的旋转轴，挤出机在内部设有熔化区，末端稳定反应区和脱挥发区，从进料口向输送口依次设置在末端稳定反应中的长度为2-15℃的区域（D为壳体的内径）区域，在上述反应区域中，在碱性物质的存在下，将具有0.1-3.3D厚度的捏合元件的长度方向固定在旋转轴上，以在熔融状态下捏合粗制甲醛共聚物从而分解粗共聚物的不稳定分子末端。该方法使粗甲醛共聚物的分子末端在短时间内有效且基本上完全稳定。

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