Propylene copolymer
    9.
    发明授权
    Propylene copolymer 失效
    丙烯共聚物

    公开(公告)号:US5219968A

    公开(公告)日:1993-06-15

    申请号:US777238

    申请日:1991-11-12

    摘要: A substantially syndiotactic propylene copolymer which comprises propylene and at least one cyclic diolefin having 6 to 25 carbon atoms or an alkadiene having 6 to 25 carbon atoms and at least one terminal double bond, in the .sup.13 C-NMR spectrum of the copolymer measured in a 1,2,4-trichlorobenzene solution, a peak intensity observed at about 20.2 ppm as the reference of tetramethylsilane at 0.0 ppm being 0.5 or more of the total peak intensity attributed to methyl groups of propylene; the content of the cyclic diolefin or the alkadiene being from 0.01 to 20 mol %; the intrinsic viscosity [.eta.] of the copolymer measured in a tetralin solution at 135.degree. C. being from 0.1 to 10 dl/g.This copolymer can contain an .alpha.-olefin other than propylene, particularly ethylene.

    摘要翻译: PCT PCT / JP91 / 00466 Sec。 371日期1991年11月12日 102(e)日期1991年11月12日PCT 1991年4月9日PCT PCT。 第WO91 / 15523号公报 日本1991年10月17日。在13 C-NMR光谱中包含丙烯和至少一种具有6至25个碳原子的环状二烯烃或具有6至25个碳原子和至少一个末端双键的链二烯的基本间同立构丙烯共聚物 在1,2,4-三氯苯溶液中测定的共聚物,作为0.0ppm的四甲基硅烷的参考值,在约20.2ppm处观察到的峰强度为归因于丙烯的甲基的总峰强度的0.5以上; 环状二烯烃或链二烯的含量为0.01〜20摩尔% 在135℃下在四氢化萘溶液中测得的共聚物的特性粘度η为0.1-10dl / g。 该共聚物可以含有除丙烯以外的α-烯烃,特别是乙烯。

    Polypropylene fiber and a preparation process thereof
    10.
    发明授权
    Polypropylene fiber and a preparation process thereof 失效
    聚丙烯纤维及其制备方法

    公开(公告)号:US5478646A

    公开(公告)日:1995-12-26

    申请号:US15056

    申请日:1993-02-08

    IPC分类号: D01F6/06 D02G3/00

    摘要: A fiber excellent in strength and having an average size of 10,000-0.1 denier can be obtained by extruding a raw material composed mainly of a polypropylene having a syndiotactic pentad fraction of 0.7 or more and optionally stretching the resulting extruded material.By using as the raw material a composition consisting of two kinds of polypropylenes each having an intrinsic viscosity .eta..sub.1 or .eta..sub.2, the log(.eta..sub.2 /.eta..sub.1) being more than 0.05 or less than -0.05, and a syndiotactic pentad fraction of 0.7 or more at a weight ratio of 95:5-5:95 or a composition consisting of at least 50 parts by weight of a syndiotactic polypropylene having the intrinsic viscosity .eta..sub.1 and a syndiotactic pentad fraction of 0.7 or above and at most 50 parts by weight of an isotactic polypropylene having the intrinsic viscosity .eta..sub.2, the extrudability is improved and the fiber stretching conditions are broadened.

    摘要翻译: 通过将主要由间同立构五单元组分为0.7以上的聚丙烯组成的原料挤出并任选地拉伸所得的挤出材料,可以获得强度优异且平均粒径为10,000-0.1旦尼尔的纤维。 通过使用由两种各自具有特性粘度eta 1或eta 2的聚丙烯组成的组合物,log(eta 2 / eta 1)大于0.05或小于-0.05,并且间同立构五单元组分数 0.7重量%以上,重量比为95:5.5:95的组合物或由至少50重量份的特性粘度η1和间同立构五单元组分数为0.7以上至多50份的间同立构聚丙烯组成的组合物 的特性粘度等于2的全同立构聚丙烯,可挤出性提高,纤维拉伸条件变宽。