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公开(公告)号：US4046738A
公开(公告)日：1977-09-06
申请号：US629628
申请日：1975-11-05
CPC分类号： C08J3/14 , C08J3/16 , C08J2359/02
摘要： Oxymethylene polymers (POM) are obtained in granular form by cooling a POM solution or dispersion having a temperature above the sintering temperature of the POM in two stages to a temperature just below the said sintering temperature. The solvent or dispersion agent used is a mixture of methanol and water and the cooling agent is a methanol/water mixture which may contain POM suspended therein. The granular POM obtained is suitable as technical material for making shaped articles.
摘要翻译： 通过将温度高于POM烧结温度的POM溶液或分散体在两个阶段中冷却至刚好低于所述烧结温度的温度，获得颗粒形式的甲醛聚合物（POM）。 使用的溶剂或分散剂是甲醇和水的混合物，冷却剂是可能含有悬浮在其中的POM的甲醇/水混合物。 获得的颗粒状POM适合作为成型制品的技术材料。
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2.发明授权Thermoplastic polyoxymethylene molding composition of high toughness and its use 失效热塑性聚甲醛成型组合物具有高韧性及其用途
公开(公告)号：US5256733A
公开(公告)日：1993-10-26
申请号：US741359
申请日：1991-08-07
申请人： Dietrich Fleischer , Helmut Schlaf
发明人： Dietrich Fleischer , Helmut Schlaf
CPC分类号： C08L59/00 , C08L51/00 , C08L55/02 , Y10S525/902
摘要： Thermoplastic molding composition composed of A) 50 to 95% by weight of polyoxymethylene, B) 5 to 50% by weight of a rubber-elastic graft copolymer and optionally customary additives, in which the component B) is composed of a rubber-elastic core based on at least one polydiene, which is at least partially crosslinked, and at least one hard graft shell and has a bimodal particle size distribution. Monomers for formation of the graft shell are styrene, (meth)acrylonitrile and/or methyl methacrylate. The moldings produced from the molding compositions possess good tough fracture characteristics even at low temperatures.
摘要翻译： 由A）50〜95重量％的聚甲醛，B）5〜50重量％的橡胶弹性接枝共聚物和任选的常规添加剂组成的热塑性成型组合物，其中组分B）由橡胶弹性芯 基于至少部分交联的至少一种聚二烯和至少一个硬接枝壳，并具有双峰粒度分布。 用于形成接枝壳的单体是苯乙烯，（甲基）丙烯腈和/或甲基丙烯酸甲酯。 由成型组合物制成的模制品即使在低温下也具有良好的韧性断裂特性。
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公开(公告)号：US5039741A
公开(公告)日：1991-08-13
申请号：US488495
申请日：1990-03-02
IPC分类号： C08L51/04 , C08F279/02 , C08L7/00 , C08L21/00 , C08L23/00 , C08L33/00 , C08L33/02 , C08L35/02 , C08L51/00 , C08L51/02 , C08L51/06 , C08L51/08 , C08L59/00 , C08L59/02 , C08L67/00 , C08L67/02 , C08L75/04 , C08L77/00 , C08L101/00
CPC分类号： C08L59/02 , C08F279/02 , C08L51/00 , C08L67/02
摘要： The invention relates to a mixture composed essentially of polyoxymethylene (component A), a rubber-elastic graft copolymer in which the particles have been formed from a rubber-elastic, single-phase core based on polydiene and a hard graft shell (component B) and, if appropriate, a polymeric third component (component C). The invention also relates to a three-component mixture of the components A, B' and C, the core, in the case of B', being preponderantly or entirely composed of poly(meth)acrylic acid ester or silicone rubber instead of polydiene.The shaped articles produced from these mixtures are particularly distinguished by good low-temperature impact strength.
摘要翻译： 本发明涉及一种基本上由聚甲醛（A组分）组成的混合物，其中由橡胶弹性的基于聚二烯的橡胶弹性单相芯和硬接枝壳（组分B）形成的橡胶弹性接枝共聚物， 并且如果合适，则为聚合物第三组分（组分C）。 本发明还涉及组分A，B'和C的三组分混合物，在B'的情况下，芯主要或完全由聚（甲基）丙烯酸酯或硅橡胶代替聚二烯而组成。 由这些混合物制成的成型制品特别是具有良好的低温冲击强度。
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公开(公告)号：US4082729A
公开(公告)日：1978-04-04
申请号：US719078
申请日：1976-08-31
申请人： Karlheinz Burg , Helmut Schlaf
发明人： Karlheinz Burg , Helmut Schlaf
摘要： Oxymethylene polymers are prepared by polymerization of trioxane, optionally in the presence of comonomers, with the acid of a cationically active initiator. Suitable initiators are salt-like compounds, especially onium salts of Lewis acids. The initiator is used in the form of a solution in a cyclic carbonic acid ester present in a liquid phase. The oxymethylene polymers are thermoplastic and may be used as engineering materials.
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公开(公告)号：US5608030A
公开(公告)日：1997-03-04
申请号：US290377
申请日：1994-08-15
CPC分类号： B01J19/2415 , C08G2/10 , C08G2/30 , B01J2219/00162 , B01J2219/00166
摘要： Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as initiators in amounts of 0.005 to 500 ppm in a polymerization zone, in which the residence time of the reaction components in this zone is 0.1 to 10 min and in which the initiator is deactivated immediately after polymerization, there being a fluid transition between the polymerization and deactivator zones which is determined solely by the addition of deactivator, and in which, besides deactivation, stabilization of the chain ends is carried out in the presence of residual monomers, with the volatile constituents being removed from the reaction mixture in a subsequent vent unit. Stabilization is carried out in the presence of alkaline substances, either at temperatures of 150.degree. C. to 250.degree. C., if necessary in the presence of water or primary alcohols, or at 175.degree. C. to 250.degree. C. in the absence of these additives.
摘要翻译： 在均相中连续制备具有稳定端基的均聚和共聚氧亚甲基的方法，其中在具有静态混合元件的管式反应器中，环状甲醛低聚物在质子酸作为引发剂存在下聚合，其量为0.005-500ppm 聚合区，其中反应组分在该区域中的停留时间为0.1至10分钟，其中引发剂在聚合后立即失活，在聚合和失活区之间存在流体转变，其仅通过加入 除去失活之外，在残留单体的存在下进行链端的稳定化，其中挥发性成分在随后的通风单元中从反应混合物中除去。 在碱性物质的存在下，如果需要，在水或伯醇的存在下，或在175℃至250℃下，在不存在碱的条件下，在碱性物质的存在下，在150℃至250℃的温度下进行稳定化 的这些添加剂。
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公开(公告)号：US5047471A
公开(公告)日：1991-09-10
申请号：US196432
申请日：1988-05-20
CPC分类号： C08L59/00 , C08L51/04 , C08L55/00 , Y10S525/902
摘要： The invention relates to a mixture composed of polyoxymethylene (component A), a rubber-elastic graft copolymer in which the particles have been formed from a rubber-elastic, single-phase core based on polydiene and a hard graft shell (component B) and a polymeric third component (component C).The invention also relates to a three-component mixture of the components A, B' and C, the core, in the case of B' being preponderantly or entirely composed of poly(meth)acrylic acid ester or silicone rubber instead of polydiene.The shaped articles produced from these mixtures are particularly distinguished by good low-temperature impact strength.
摘要翻译： 本发明涉及由聚甲醛（A成分），橡胶弹性接枝共聚物组成的混合物，其中由橡胶弹性的基于聚二烯的单相芯和硬质接枝壳（组分B）形成颗粒;和 聚合物第三组分（组分C）。 本发明还涉及组分A，B'和C的三组分混合物，其中B'主要或完全由聚（甲基）丙烯酸酯或硅橡胶代替聚二烯而构成。 由这些混合物制成的成型制品特别是具有良好的低温冲击强度。
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公开(公告)号：US4151346A
公开(公告)日：1979-04-24
申请号：US872441
申请日：1978-01-26
CPC分类号： C08J3/12 , C08J3/14 , C08J3/16 , C08J2359/02
摘要： Oxymethylene polymers are obtained in a granular form by cooling a solution or dispersion of an oxymethylene polymer, the temperature of which solution or dispersion is above the sintering temperature of the oxymethylene polymer, to a temperature just below the sintering temperature of the oxymethylene polymer. As dissolving or dispersing agent as well as precipitating and cooling agent there is used a mixture of methanol and water having a methanol content of at least 75% by weight. The oxymethylene polymer obtained is suitable as engineering plastic for preparing moulded articles.
摘要翻译： 通过将甲醛聚合物的溶液或分散体（其溶液或分散体的温度高于甲醛聚合物的烧结温度）冷却到刚好低于甲醛聚合物的烧结温度的温度，获得了颗粒形式的甲醛聚合物。 作为溶解或分散剂以及沉淀和冷却剂，使用具有至少75重量％的甲醇含量的甲醇和水的混合物。 所得到的甲醛聚合物适用于制备模塑制品的工程塑料。
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公开(公告)号：US5401859A
公开(公告)日：1995-03-28
申请号：US072761
申请日：1993-06-07
申请人： Karl Muck , Helmut Schlaf , Siegbert Rittner
发明人： Karl Muck , Helmut Schlaf , Siegbert Rittner
IPC分类号： B01D9/02 , C07D323/06
CPC分类号： C07D323/06
摘要： In the process for the preparation of pure trioxane by continuous or semicontinuous crystallization processes, if alkaline organic compounds are added no flocks appear after more than 120 hours of operation. As a result, blockage of the crystallization unit is prevented and problem-free running is made possible.
摘要翻译： 在通过连续或半连续结晶方法制备纯三恶烷的过程中，如果添加碱性有机化合物，则在120多小时的操作后不会出现绒毛。 结果，阻止了结晶单元的堵塞，并且无故障运行成为可能。
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公开(公告)号：US5266633A
公开(公告)日：1993-11-30
申请号：US716855
申请日：1991-06-17
摘要： The invention relates to a mixture composed essentially of polyoxymethylene (component A), a rubber-elastic graft copolymer in which the particles have been formed from a rubber-elastic, single-phase core based on polydiene and a hard graft shell (component B) and, if appropriate, a polymeric third component (component C). The invention also relates to a three-component mixture of the components A, B' and C, the core, in the case of B', being preponderantly or entirely composed of poly(meth)acrylic acid ester or silicone rubber instead of polydiene.The shaped articles produced from these mixtures are particularly distinguished by good low-temperature impact strength.
摘要翻译： 本发明涉及一种基本上由聚甲醛（A组分）组成的混合物，其中由橡胶弹性的基于聚二烯的橡胶弹性单相芯和硬接枝壳（组分B）形成的橡胶弹性接枝共聚物， 并且如果合适，则为聚合物第三组分（组分C）。 本发明还涉及组分A，B'和C的三组分混合物，在B'的情况下，芯主要或完全由聚（甲基）丙烯酸酯或硅橡胶代替聚二烯而组成。 由这些混合物制成的成型制品特别是具有良好的低温冲击强度。
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10.发明授权Process for the preparation of granular oxymethylene polymers having improved mechanical properties 失效具有改进的机械性能的颗粒状甲醛聚合物的制备方法
公开(公告)号：US4195158A
公开(公告)日：1980-03-25
申请号：US931985
申请日：1978-08-08
CPC分类号： C08J3/12 , C08J2359/02
摘要： Oxymethylene polymers (POM) are obtained in a granular form, by cooling a POM solution or dispersion, whose temperature is above the sintering temperature of the POM, to a temperature slightly below the sintering temperature of the POM, and extracting from the suspension obtained only those POM particles which show a grain diameter of more than 70 .mu.m. As solvent or dispersing agent as well as precipitating and cooling agent there is used a mixture of methanol and water with a methanol content of at least 75% by weight. The POM obtained is suitable as engineering plastic material for the manufacture of shaped articles having improved mechanical properties.
摘要翻译： 通过将温度高于POM的烧结温度的POM溶液或分散体冷却至略低于POM的烧结温度的温度，并从仅获得的悬浮液中提取，得到颗粒状的甲醛聚合物（POM） 那些显示出超过70μm的粒径的POM颗粒。 作为溶剂或分散剂以及沉淀和冷却剂，使用甲醇和水的混合物，甲醇含量至少为75重量％。 获得的POM适用于制造具有改进的机械性能的成形制品的工程塑料材料。
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