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。

公开(公告)号：US4111912A

公开(公告)日：1978-09-05

申请号：US793859

申请日：1977-05-04

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

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

IPC分类号： D01F6/66 ,  C08G2/00 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G2/38 ,  C08J3/12 ,  C08J3/14

CPC分类号： C08J3/12 ,  C08G2/18 ,  C08G2/38 ,  C08J2359/02

摘要： Granular oxymethylene polymers are prepared by cooling a solution or dispersion of an oxymethylene polymer, the temperature of the said solution or dispersion being above the sintering temperature of the oxymethylene polymer, to a temperature just below the said sintering temperature. As dissolving or dispersing agent there is used a mixture of methanol and water. The cooling of the said solution or dispersion is effected in two stages while using a liquid cooling agent or a cooling device. After precipitation the coarse-granular polymer is separated from the fine-granular portion. It is suitable as engineering plastic for preparing molded articles.

公开(公告)号：US5340877A

公开(公告)日：1994-08-23

申请号：US900905

申请日：1992-06-18

申请人： Oskar Schleith ,  Hans-Dieter Sabel

发明人： Oskar Schleith ,  Hans-Dieter Sabel

IPC分类号： C08L33/04 ,  C08L59/00 ,  C08L59/02 ,  C08L33/02

CPC分类号： C08L59/00 ,  C08L33/04

摘要： It has been found that moldings produced from polyoxymethylene have reduced gloss if an acrylic (co)polymer is incorporated into the polyoxymethylene. The polyoxymethylene modified according to the invention gives moldings having a streak-free, uniformly matt surface which generally retain the physical properties and also the inherent color of the base material.

摘要翻译： 已经发现，如果将丙烯酸（共）聚合物引入聚甲醛中，由聚甲醛制备的模制品具有降低的光泽度。 根据本发明改性的聚甲醛给出具有无条纹，均匀的无光泽表面的模制品，其通常保持基材的物理性能和固有颜色。

公开(公告)号：US5416152A

公开(公告)日：1995-05-16

申请号：US988720

申请日：1992-12-10

申请人： Dietrich Fleischer ,  Andreas Kirst ,  Klaus Kohlhepp ,  Hans-Dieter Sabel

发明人： Dietrich Fleischer ,  Andreas Kirst ,  Klaus Kohlhepp ,  Hans-Dieter Sabel

IPC分类号： B29C43/24 ,  C08K5/098 ,  C08K5/10 ,  C08K5/101 ,  C08L23/06 ,  C08L59/00 ,  F23Q2/50 ,  C08K5/00

CPC分类号： C08K5/098 ,  C08K5/101 ,  C08L59/00 ,  C08L23/06

摘要： A polyacetal molding composition comprising, as the active additive, at least onea) ester of long-chain monocarboxylic acids (C.sub.22 to C.sub.34) with mono- or polyhydric alcohols (C.sub.2 to C.sub.8), in the presence or absence of alkali metal and/or alkaline earth metal salts of the carboxylic acids mentioned, and/orb) polyethylene wax, is distinguished by a reduced tendency toward melt fracture. Such molding compositions can advantageously be employed in the production of shaped articles which show no undesirable defects in the surface.

摘要翻译： 一种聚缩醛成型组合物，其包含作为活性添加剂的至少一种a）长链单羧酸酯（C22至C34）与单或多元醇（C2至C8）的酯，在碱金属和/ 或所述羧酸的碱土金属盐，和/或b）聚乙烯蜡，其特征在于熔融断裂的倾向降低。 这种成型组合物可以有利地用于生产在表面没有不期望的缺陷的成形制品。