Method for molding syndiotactic polypropylene and molded article
    7.
    发明授权
    Method for molding syndiotactic polypropylene and molded article 失效
    间同立构聚丙烯和模塑制品的成型方法

    公开(公告)号:US5260395A

    公开(公告)日:1993-11-09

    申请号:US928062

    申请日:1992-08-11

    摘要: A method for molding a polypropylene or a propylene copolymer having a syndiotactic structure which comprises the steps of melting, molding, if desired, quenching and then stretching a propylene homopolymer or a copolymer of propylene and a small amount of ethylene or another .alpha.-olefin which has a substantially syndiotactic structure, or a mixture of the same and a small amount of a polypropylene having a substantially isotactic structure. The molded and stretched article can be heated at a temperature of a molding temperature or more, while a load is applied to the article. Furthermore, the molded and stretched article, if desired, can be treated with a hydrocarbon vapor, while a load is applied to the article. The molded article obtained by the method of the present invention has a novel crystalline structure.

    摘要翻译: 用于模制具有间同立构结构的聚丙烯或丙烯共聚物的方法包括以下步骤:熔融,模塑,如果需要,淬火然后拉伸丙烯均聚物或丙烯与少量乙烯或另一种α-烯烃的共聚物 具有基本间同立构结构,或相同和少量具有基本上全同立构结构的聚丙烯的混合物。 模制和拉伸的制品可以在成型温度或更高的温度下加热,同时将负载施加到制品上。 此外,如果需要,模制和拉伸的制品可以用烃蒸气处理,同时将负载施加到制品上。 通过本发明的方法获得的模制品具有新颖的晶体结构。

    Process for injection molding polyolefin resin compositions
    8.
    发明授权
    Process for injection molding polyolefin resin compositions 失效
    注塑聚烯烃树脂组合物的方法

    公开(公告)号:US4439567A

    公开(公告)日:1984-03-27

    申请号:US396202

    申请日:1982-07-08

    IPC分类号: C08K5/1575 C08K5/15

    CPC分类号: C08K5/1575

    摘要: There is provided a polyolefin resin composition for injection molding which comprises adding to polyolefin a condensate of sorbitol with an aldehyde compound and a lubricant of 1/20 to 1/2 parts by weight based on 1.0 part by weight of said condensate. Thereby polyolefin injection moldings with good transparency are obtained without bringing a foaming phenomenon.

    摘要翻译: 提供了一种用于注射成型的聚烯烃树脂组合物,其包括向聚烯烃中加入山梨糖醇与醛化合物的缩合物和基于1.0重量份所述缩合物的1/20至1/2重量份的润滑剂。 从而获得具有良好透明度的聚烯烃注射成型品而不产生起泡现象。

    Polymeric insulating material and formed article making use of the
material
    9.
    发明授权
    Polymeric insulating material and formed article making use of the material 失效
    聚合绝缘材料和使用该材料的成型制品

    公开(公告)号:US5573840A

    公开(公告)日:1996-11-12

    申请号:US451394

    申请日:1995-05-26

    IPC分类号: C08L23/12 H01B3/44 B32B7/02

    摘要: The invention provides a polymeric insulating material having a high dielectric breakdown voltage. The material comprises polypropylene which has been obtained in a yield of at least 300,000 g/g-Ti based on titanium in a catalyst upon polymerization, contains ash in an amount not greater than 40 ppm by weight when analyzed by completely burning the polypropylene in air, said ash containing titanium in an amount not greater than 1 ppm by weight based on the weight of the polypropylene, and also contains chlorine in an amount not greater than 2 ppm by weight and boiling n-heptane soluble matter in an amount not smaller than 1 wt. % but not greater than 10 wt. %. To further improve the dielectric breakdown voltage an inorganic oxide or hydroxide free of particles of 10 .mu.m and greater in diameter and having an average particle size not greater than 1 .mu.m, an organopolysilane, a maleic-anhydride-grafted polypropylene, or a silane compound containing at least one organic polyether group can be added to the polypropylene.

    摘要翻译: 本发明提供了具有高绝缘击穿电压的聚合物绝缘材料。 该材料包括在聚合时以催化剂中钛为基准的至少300,000g / g-Ti的产率获得的聚丙烯,当通过在空气中完全燃烧聚丙烯进行分析时,含有不大于40ppm重量的灰分 所述灰分含量以聚丙烯重量计不超过1重量ppm,并且还含有不大于2重量ppm的氯和沸点正庚烷可溶物质量不小于 1重量% %但不大于10wt。 %。 为了进一步提高介电击穿电压,无机氧化物或氢氧化物不含直径10μm以上且平均粒径不大于1μm的颗粒,有机聚硅烷,马来酸酐接枝的聚丙烯或硅烷 可以将含有至少一个有机聚醚基团的化合物加入到聚丙烯中。

    Polymeric insulating material and formed article making use of the
material
    10.
    发明授权
    Polymeric insulating material and formed article making use of the material 失效
    聚合绝缘材料和使用该材料的成型制品

    公开(公告)号:US5476709A

    公开(公告)日:1995-12-19

    申请号:US73676

    申请日:1993-06-08

    IPC分类号: C08L23/12 H01B3/44 B32B7/02

    摘要: The invention provides a polymeric insulating material having a high dielectric breakdown voltage. The material comprises polypropylene which has been obtained in a yield of at least 300,000 g/g-Ti based on titanium in a catalyst upon polymerization, contains ash in an amount not greater than 40 ppm by weight when analyzed by completely burning the polypropylene in air, said ash containing titanium in an amount not greater than 1 ppm by weight based on the weight of the polypropylene, and also contains chlorine in an amount not greater than 2 ppm by weight and boiling n-heptane soluble matter in an amount not smaller than 1 wt. % but not greater than 10 wt. %. According to the invention, it is possible to further improve the dielectric breakdown voltage by adding to the polypropylene an inorganic oxide or hydroxide free of particles of 10 .mu.m and greater in diameter and having an average particle size not greater than 1 .mu.m, an organopolysilane, a maleic-anhydride-grafted polypropylene, or a silane compound containing at least one organic polyether group.

    摘要翻译: 本发明提供了具有高绝缘击穿电压的聚合物绝缘材料。 该材料包括在聚合时以催化剂中钛为基准的至少300,000g / g-Ti的产率获得的聚丙烯,当通过在空气中完全燃烧聚丙烯进行分析时,含有不大于40ppm重量的灰分 所述灰分含量以聚丙烯重量计不超过1重量ppm,并且还含有不大于2重量ppm的氯和沸点正庚烷可溶物质量不小于 1重量% %但不大于10wt。 %。 根据本发明,通过向聚丙烯中添加不含直径10μm以上的平均粒径为1μm以下的无机氧化物或氢氧化物,可以进一步提高介电击穿电压, 有机聚硅烷,马来酸酐接枝的聚丙烯或含有至少一个有机聚醚基团的硅烷化合物。