Polyoxymethylene molding materials having improved thermal stability,
their preparation and their use
    3.
    发明授权
    Polyoxymethylene molding materials having improved thermal stability, their preparation and their use 失效
    聚甲醛成型材料具有改进的热稳定性,其制备及其用途

    公开(公告)号:US4837400A

    公开(公告)日:1989-06-06

    申请号:US152389

    申请日:1988-02-04

    CPC分类号: C08K5/521 C08K13/02 C08K3/34

    摘要: Polyoxymethylene molding materials having improved heat stability and consisting of(A) one or more polyoxymethylene homopolymers and/or copolymers and(B) one or more antioxidants having a sterically hindered phenolic structure,(C) with or without additives, contain(D) as an additive, one or more alkaline earth metal silicates and/or alkaline earth metal glycerophosphates, advantageously in an amount of from 0.002 to 2.0% by weight, based on the weight of component (A),for improving the heat stability, reducing the tendency to discoloration and minimizing the free formaldehyde content.To prepare the novel polyoxymethylene molding materials, the components are advantageously melted in an extruder at from 150.degree. to 260.degree. C.The polyoxymethylene molding materials are useful for the production of films or, preferably, moldings, which are used, for example, in the automotive, electrical appliances and electronics industries.

    摘要翻译: 具有改进的热稳定性并由(A)一种或多种聚甲醛均聚物和/或共聚物组成的聚甲醛成型材料和(B)一种或多种具有空间位阻酚结构的抗氧化剂,(C)含或不含添加剂,含有(D)为 添加剂,一种或多种碱土金属硅酸盐和/或碱土金属甘油磷酸盐,其用量以组分(A)的重量计为0.002至2.0重量%,用于改善热稳定性,降低趋势 使变色和使游离甲醛含量最小化。 为了制备新颖的聚甲醛成型材料,有利的是在150至260℃的挤出机中熔融组分。聚氧化亚甲基成型材料可用于生产薄膜或模制品,例如用于 汽车,电器和电子行业。

    Molding materials of polyoxymethylene homopolymers and/or copolymers and
thermoplastic polyurethane elastomers having improved heat stability,
their preparation and their use
    4.
    发明授权
    Molding materials of polyoxymethylene homopolymers and/or copolymers and thermoplastic polyurethane elastomers having improved heat stability, their preparation and their use 失效
    聚甲醛均聚物和/或共聚物和具有改进的热稳定性的热塑性聚氨酯弹性体的成型材料及其制备及其用途

    公开(公告)号:US4780498A

    公开(公告)日:1988-10-25

    申请号:US77631

    申请日:1987-07-24

    CPC分类号: C08K3/34 C08L59/00 C08L75/04

    摘要: Molding materials of(A) one or more polyoxymethylene homopolymers and/or copolymers and(B) one or more thermoplastic polyurethane elastomers,(C) with or without additives, contain, as an additive,(D) one or more alkaline earth metal silicates, advantageously in an amount of from 0.005 to 2% by weight, based on the weight of the components (A) and (B), for improving the heat stability, reducing the tendency to discoloration and minimizing the free formaldehyde content.To prepare the molding materials, the components (A), (B), (D) and, if required (C) are advantageously melted together in an extruder at from 150.degree. to 260.degree. C.The molding materials are useful for the production of films or moldings, which are used, for example, in the automotive, electrical appliances and electronics industries.

    摘要翻译: (A)一种或多种聚甲醛均聚物和/或共聚物的成型材料和(B)一种或多种热塑性聚氨酯弹性体,(C)有或没有添加剂,含有(D)一种或多种碱土金属硅酸盐 ,有利地为基于组分(A)和(B)的重量的0.005-2重量%,用于改善热稳定性,降低变色的倾向和使游离甲醛含量最小化。 为了制备模塑材料,组分(A),(B),(D)和(如果需要(C))有利地在150至260℃的挤出机中熔融在一起。成型材料可用于生产 的电影或模制品,其用于例如汽车,电器和电子工业。

    Method of improving the weatherbility and color retention performance of styrene copolymer compositions
    5.
    发明授权
    Method of improving the weatherbility and color retention performance of styrene copolymer compositions 有权
    改善苯乙烯共聚物组合物耐候性和保色性能的方法

    公开(公告)号:US06482893B1

    公开(公告)日:2002-11-19

    申请号:US09664651

    申请日:2000-09-19

    IPC分类号: C08L900

    摘要: Styrene copolymer compositions, especially ASA compositions, exhibit improved weatherability and color retention performance when processed according to the invention. Disclosed herein is a method of improving the weatherability and color retention performance of styrene copolymer compositions and exterior siding incorporating such styrene copolymer compositions. More specifically, a method is disclosed comprising improving the weatherability and color retention of styrene copolymer compositions, especially ASA compositions, which is advantageous with respect to cost and ease of manufacturing. Composite articles are also disclosed incorporating the foregoing improved styrene copolymer compositions as an exterior layer.

    摘要翻译: 苯乙烯共聚物组合物,特别是ASA组合物,在根据本发明加工时表现出改进的耐候性和保色性能。 本文公开了一种改善苯乙烯共聚物组合物和包含这种苯乙烯共聚物组合物的外部壁板的耐候性和保色性能的方法。 更具体地,公开了一种改进苯乙烯共聚物组合物,特别是ASA组合物的耐候性和保色性的方法,其在成本和制造方便方面是有利的。 还公开了将前述改进的苯乙烯共聚物组合物作为外部层结合的复合制品。

    Wollastonite-reinforced polyoxymethylene molding materials and their
preparation
    6.
    发明授权
    Wollastonite-reinforced polyoxymethylene molding materials and their preparation 失效
    硅灰石增强聚甲醛成型材料及其制备

    公开(公告)号:US4987176A

    公开(公告)日:1991-01-22

    申请号:US221517

    申请日:1988-07-20

    摘要: Reinforced polyoxymethylene materials containing(A) one or more polyoxymethylene homopolymers and/or copolymers and(B) wollastonite, advantageously in a weight ratio of components (A) to (B) of from 95:50 to5:50, with or without(C) additives in effective amounts, the wollastonite crystals (B) have a mean thickness equal to or smaller than 5 .mu.m and a mean length/thickness ratio equal to or greater than 5. The molding materials are prepared by introducing the wollastonite crystals (B) into the melt of component (A) at from 180.degree. to 260.degree. C., advantageously by means of an extruder.

    摘要翻译: 含有(A)一种或多种聚甲醛均聚物和/或共聚物的增强聚甲醛材料和(B)硅灰石,有利地是组分(A)至(B)的重量比为95:50至5:50,具有或不具有(C )添加剂,硅灰石晶体(B)的平均厚度等于或小于5μm,平均长度/厚度比等于或大于5.成型材料通过将硅灰石晶体(B )有利地通过挤出机在180℃至260℃进入组分(A)的熔体中。

    Impact-resistant polyoxymethylene molding materials and their preparation
    7.
    发明授权
    Impact-resistant polyoxymethylene molding materials and their preparation 失效
    耐冲击聚甲醛成型材料及其制备方法

    公开(公告)号:US4639488A

    公开(公告)日:1987-01-27

    申请号:US795128

    申请日:1985-11-05

    摘要: Impact-resistant polyoxymethylene molding materials containing(A) from 30 to 95% by weight of one or more polyoxymethylenes and(B) from 5 to 70% by weight of one or more elastomeric graft polymers which are prepared by emulsion polymerization, are dispersed in component A, have a mean particle diameter of from 0.08 to 2 .mu.m and are composed of1. from 60 to 90% by weight of a grafting base of crosslinked polybutadiene in which not more than 30% by weight of the butadiene may be replaced with isoprene, 2,3-dimethylbutadiene, styrene, p-methylstyrene, .alpha.-methylstyrene and/or (meth)acrylonitrile, and2. from 10 to 40% by weight of one or more grafted shells consisting of polymers of styrene and/or methyl methacrylate, in which not more than 15% by weight of the said monomers 2 may be replaced with acrylonitrile or a C.sub.1 -C.sub.8 -alkyl acrylate,the percentages A and B and the percentages 1 and 2 summing to 100, with or without(C) effective amounts of assistants,and a process for their preparation.

    摘要翻译: 含有(A)30至95重量%的一种或多种聚甲醛的抗冲击聚甲醛成型材料和(B)5-70重量%的通过乳液聚合制备的一种或多种弹性体接枝聚合物分散在 组分A的平均粒径为0.08至2μm,并由1.60至90重量%的交联聚丁二烯接枝碱组成,其中不超过30重量%的丁二烯可被替换 与异戊二烯,2,3-二甲基丁二烯,苯乙烯,对甲基苯乙烯,α-甲基苯乙烯和/或(甲基)丙烯腈,以及2.10至40重量%的一种或多种接枝壳,其由苯乙烯和/或 甲基丙烯酸甲酯,其中不超过15重量%的所述单体2可以被丙烯腈或丙烯酸C1-C8烷基酯代替,百分比A和B以及百分比1和2相加到100,有或没有( C)有效数量的助理,以及他们p 赔偿。