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公开(公告)号：US5994455A
公开(公告)日：1999-11-30
申请号：US149795
申请日：1998-09-08
申请人： Karl-Friedrich Muck , Horst Roschert , Robert M. Gronner , Satyajit Verma , Michael G. Yearwood
发明人： Karl-Friedrich Muck , Horst Roschert , Robert M. Gronner , Satyajit Verma , Michael G. Yearwood
摘要： A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is dissolved in the formaldehyde dialkyl acetal before admixing to the trioxane and the comonomers.
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公开(公告)号：US5962623A
公开(公告)日：1999-10-05
申请号：US149581
申请日：1998-09-08
申请人： Peter Eckardt , Michael Hoffmockel , Karl-Friedrich Muck , Gerhard Reuschel , Satyajit Verma , Michael G. Yearwood
发明人： Peter Eckardt , Michael Hoffmockel , Karl-Friedrich Muck , Gerhard Reuschel , Satyajit Verma , Michael G. Yearwood
摘要： A continuous process for the preparation of polyacetal copolymers from 1,3,5-trioxane and the comonomers known for this purpose using strong protic acids as an initiator, in which the initiator is added in an amount of 0.01 to 0.6 ppm, based on the total amount of monomers, in finely divided form to the monomer mixture, after the polymerization step the crude polymer is transferred from the polymerization reactor to a mixing unit without further intermediate steps, excess monomer is removed from the crude polymer in the mixing unit or between polymerization reactor and mixing unit by applying reduced pressure and, if desired, generally customary stabilizers, assistants, fillers, reinforcing materials and/or colorants are incorporated into the polymer in the mixing unit.
摘要翻译： 以1,3,5-三恶烷和为此目的已知的共聚单体使用强质子酸作为引发剂制备聚缩醛共聚物的连续方法，其中引发剂的添加量为0.01至0.6ppm，基于 在聚合步骤之后，粗聚合物从聚合反应器转移到混合单元而没有进一步的中间步骤，在混合单元中从粗聚合物中除去过量的单体，或在混合单元之间 聚合反应器和混合单元，并且如果需要，通常将常规稳定剂，助剂，填料，增强材料和/或着色剂并入混合单元中的聚合物中。
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3.再颁专利公开(公告)号：USRE39182E1
公开(公告)日：2006-07-11
申请号：US09998276
申请日：2001-11-30
申请人： Karl-Friedrich Mück , Horst Röschert , Robert M. Gronner , Satyajit Verma , Michael G. Yearwood
发明人： Karl-Friedrich Mück , Horst Röschert , Robert M. Gronner , Satyajit Verma , Michael G. Yearwood
摘要： A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is dissolved in the formaldehyde dialkyl acetal before admixing to the trioxane and the comonomers.
摘要翻译： 一种制备聚甲醛共聚物的方法，其中1,3,5-三恶烷在强质子酸引发剂的存在下和在甲醛二烷基缩醛存在下与通常已知的共聚单体聚合，并且其中引发剂溶于 甲醛二烷基缩醛，然后与三恶烷和共聚单体混合。
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