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    Thermoplastic molding compositions on the basis of polyoxymethylenes
    1.
    发明授权
    Thermoplastic molding compositions on the basis of polyoxymethylenes 失效
    基于聚甲醛的热塑性成型组合物

    公开(公告)号：US4181685A

    公开(公告)日：1980-01-01

    申请号：US676927

    申请日：1976-04-14

    申请人： Rudolf Kern ,  Heinz Schmidt ,  Karlheinz Burg ,  Ernst Wolters ,  Gunter Sextro

    发明人： Rudolf Kern ,  Heinz Schmidt ,  Karlheinz Burg ,  Ernst Wolters ,  Gunter Sextro

    IPC分类号： C08G2/18 ,  C08L59/00 ,  C08L59/02

    CPC分类号： C08G2/18 ,  C08L59/02 ,  C08L59/00

    摘要： Thermoplastic molding compositions having improved properties are composed of a mixture of from 99.999 to 90% by weight of a linear polyoxymethylene and from 0.001 to 10% by weight of a branched or cross-linked polyoxymethylene. The linear polyoxymethylenes are homopolymers of formaldehyde or of trioxane or copolymers of trioxane and at least one compound of monofunctional reaction which can be copolymerized with trioxane. The branched or cross-linked polyoxymethylenes are copolymers of trioxane and a multifunctionally reacting compound, or copolymers of trioxane, a monofunctionally reacting compound and a branched or cross-linked polyether. The molding compositions yield shaped articles having improved mechanical properties.

    摘要翻译： 具有改进性能的热塑性成型组合物由99.999至90重量％的线性聚甲醛和0.001至10重量％的支链或交联的聚甲醛的混合物组成。 线性聚氧化甲烯是甲醛或三恶烷的均聚物或三恶烷与至少一种可与三恶烷共聚的单官能反应化合物的共聚物。 支链或交联聚氧亚甲基是三恶烷和多官能化反应化合物的共聚物，或三恶烷，单官能化反应化合物和支链或交联聚醚的共聚物。 成型组合物产生具有改善的机械性能的成型制品。

    Stabilized molding compositions based on poly(oxymethylene)
    2.
    发明授权
    Stabilized molding compositions based on poly(oxymethylene) 失效
    基于聚（甲醛）的稳定成型组合物

    公开(公告)号：US3969292A

    公开(公告)日：1976-07-13

    申请号：US582301

    申请日：1975-05-30

    申请人： Ernst Wolters ,  Heinz Schmidt ,  Karlheinz Burg ,  Gunter Sextro

    发明人： Ernst Wolters ,  Heinz Schmidt ,  Karlheinz Burg ,  Gunter Sextro

    IPC分类号： C08K5/098 ,  C08J3/20

    CPC分类号： C08K5/098

    摘要： Oxymethylene polymers are stabilized against the action of heat and oxygen by a stabilizer combination of an ester of a hydroxyl group containing araliphatic or aromatic carboxylic acid and an alkaline earth metal salt of an aliphatic, araliphatic or aromatic carboxylic acid. The efficiency of the stabilizer combination can be further improved by the addition of a costabilizer, especially a guanidine compound. The stabilized poly(oxymethylenes) are suitable for the manufacture of semifinished and finished articles.

    摘要翻译： 通过含有芳族脂族或芳族羧酸的羟基的酯与脂肪族，芳脂族或芳族羧酸的碱土金属盐的稳定剂组合，甲醛聚合物通过热和氧的作用而被稳定化。 通过添加稳定剂，特别是胍化合物，可以进一步提高稳定剂组合的效率。 稳定的聚（氧亚甲基）适用于制造半成品和成品。

    Thermoplastic molding compositions on the basis of polyoxymethylenes
    3.
    发明授权
    Thermoplastic molding compositions on the basis of polyoxymethylenes 失效
    基于聚甲醛的热塑性成型组合物

    公开(公告)号：US4070415A

    公开(公告)日：1978-01-24

    申请号：US217668

    申请日：1972-01-13

    申请人： Gunter Sextro ,  Karlheinz Burg ,  Rudolf Kern ,  Heinz Schmidt ,  Ernst Wolters

    发明人： Gunter Sextro ,  Karlheinz Burg ,  Rudolf Kern ,  Heinz Schmidt ,  Ernst Wolters

    IPC分类号： C08G2/18 ,  C08L59/00 ,  C08L59/02 ,  C08L63/00 ,  C08L63/02

    CPC分类号： C08G2/18 ,  C08L59/00

    摘要： The invention provides thermoplastic molding compositions having improved properties. The compositions are composed of a mixture of from 99.999 to 99.9 wt.% of a linear polyoxymethylene and from 0.001 to 0.1 wt.% of a branched or cross-linked copolymer of trioxan with a multifunctionally reacting compound and optionally a monofunctionally reacting compound, or with a monofunctionally reacting compound and a branched or cross-linked polyether, or of a subsequently branched or cross-linked linear polyoxymethylene having functional groups in lateral or chain position.

    摘要翻译： 本发明提供具有改进性能的热塑性模塑组合物。 组合物由99.999至99.9重量％的线性聚甲醛和0.001至0.1重量％的三氧杂与多官能化反应化合物和任选的单官能反应化合物的支链或交联共聚物的混合物组成，或 具有单功能反应化合物和支链或交联的聚醚，或者具有在侧链或链状位置具有官能团的随后支链或交联的线性聚甲醛。

    Process for preparing a stabilized oxymethylene copolymer
    4.
    发明授权
    Process for preparing a stabilized oxymethylene copolymer 失效
    制备稳定的甲醛共聚物的方法

    公开(公告)号：US4024105A

    公开(公告)日：1977-05-17

    申请号：US551235

    申请日：1975-02-20

    申请人： Gunter Sextro ,  Karlheinz Burg ,  Ernst Wolters

    发明人： Gunter Sextro ,  Karlheinz Burg ,  Ernst Wolters

    IPC分类号： C08L59/00 ,  C08G2/00 ,  C08G2/18 ,  C08G2/36 ,  C08K5/09 ,  C08K5/098 ,  C08G2/32 ,  C08G2/10

    CPC分类号： C08G2/36 ,  C08K5/098

    摘要： Oxymethylene copolymer having heat and hydrolysis resistant terminal groups is prepared by heating the polymers present in a liquid phase, whereby a thermal degradation of the unstable terminal groups takes place. The degradation is advantageously effected in the presence of a calcium or magnesium salt of an aliphatic carboxylic acid of low molecular weight. The oxymethylene copolymers are suitable as engineering plastic for preparing semi-finished products and finished products.

    摘要翻译： 通过加热存在于液相中的聚合物来制备具有耐热和耐水解端基的亚甲基共聚物，由此发生不稳定末端基团的热降解。 降解有利地在低分子量的脂族羧酸的钙盐或镁盐的存在下进行。 甲醛共聚物适用于制备半成品和成品的工程塑料。

    Process for preparing oxymethylene polymers in a granular form
    5.
    发明授权
    Process for preparing oxymethylene polymers in a granular form 失效
    制备颗粒形式的甲醛聚合物的方法

    公开(公告)号：US4151346A

    公开(公告)日：1979-04-24

    申请号：US872441

    申请日：1978-01-26

    申请人： Gunter Sextro ,  Karlheinz Burg ,  Helmut Schlaf ,  Hans J. Leugering ,  Alwin Heller

    发明人： Gunter Sextro ,  Karlheinz Burg ,  Helmut Schlaf ,  Hans J. Leugering ,  Alwin Heller

    IPC分类号： C08J3/12 ,  C08G2/22 ,  C08G2/28 ,  C08G16/02

    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。

    Continuous process for removing unstable components from crude oxymethylene copolymer
    7.
    发明授权
    Continuous process for removing unstable components from crude oxymethylene copolymer 失效
    从原始甲基乙烯共聚物中除去不稳定成分的连续方法

    公开(公告)号：US5144005A

    公开(公告)日：1992-09-01

    申请号：US152170

    申请日：1988-02-04

    申请人： Gunter Sextro ,  Karl-Friedrich Muck ,  Karlheinz Burg ,  Eberhard Fischer

    发明人： Gunter Sextro ,  Karl-Friedrich Muck ,  Karlheinz Burg ,  Eberhard Fischer

    IPC分类号： C08G2/10 ,  C08G2/28

    CPC分类号： C08G2/28

    摘要： Continuous process for removing unstable components from crude oxymethylene copolymer, which still contains catalysts, monomeric starting materials and unstable components, by treating the copolymer with deactivators, optionally in the presence of auxiliaries, in a pressure zone, and subsequently removing volatile components in a pressure-release zone in the presence or absence of stabilizers, in which process the crude polymer is fully melted in the absence of the deactivators and auxiliaries immediately after completion of the polymerization step, and the deactivators are subsequently incorporated, alone or together with auxiliaries, under pressure into the resultant polymer melt in at least one pressure zone.By this process, degradation is avoided and significantly better properties are obtained.

    摘要翻译： 通过在压力区任选地在助剂的存在下用失活剂处理共聚物，然后在压力下除去挥发性组分，从而仍然含有催化剂，单体原料和不稳定组分的粗制甲醛共聚物中除去不稳定组分的连续方法 在存在或不存在稳定剂的情况下，释放区域，在该方法中，在聚合步骤完成之后，粗聚合物在不存在失活剂和助剂的情况下完全熔融，随后将失活剂单独或与助剂一起加入到助剂中 在至少一个压力区中压入所得聚合物熔体。 通过该过程，可以避免劣化并获得显着更好的性能。

    Process for the preparation of granular oxymethylene polymers having improved mechanical properties
    8.
    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

    申请人： Karlheinz Burg ,  Alwin Heller ,  Hans-Dieter Sabel ,  Helmut Schlaf ,  Gunter Sextro

    发明人： Karlheinz Burg ,  Alwin Heller ,  Hans-Dieter Sabel ,  Helmut Schlaf ,  Gunter Sextro

    IPC分类号： C08J3/14 ,  C08J3/12 ,  C08G2/28

    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。