Ethylene/butene-1 copolymers
    4.
    发明授权
    Ethylene/butene-1 copolymers 失效
    乙烯/丁烯-1共聚物

    公开(公告)号:US5084540A

    公开(公告)日:1992-01-28

    申请号:US616767

    申请日:1990-11-20

    CPC分类号: C08F210/16

    摘要: Crystalline copolymers of ethylene and alpha-olefins CH.sub.2 .dbd.CHR in which R is an alkyl group having 2 to 8 carbon atoms, containing 0.5 to 3% by moles of polymerized alpha-olefin and having a density lower than 0.945 g/cc are obtained by polymerizing, in the gas phase, mixtures of ethylene and the alpha-olefins in contact with catalysts prepared from (1) Ti compounds supported on Mg halides and (2) organometallic compounds, which are active in the polymerization of ethylene but exhibit little, if any, activity in the homo- or copolymerization of the alpha-olefins.

    摘要翻译: 乙烯和α-烯烃CH 2 = CHR的结晶共聚物,其中R为具有2-8个碳原子的烷基,含有0.5-3%(摩尔)聚合的α-烯烃,密度低于0.945g / cc,通过 在气相中聚合乙烯和α-烯烃的混合物与由(1)负载在卤化镁上的Ti化合物和(2)有机金属化合物制备的催化剂接触,所述有机金属化合物在乙烯的聚合中是有活性的,但是如果 任何在α-烯烃的均聚或共聚中的活性。

    Catalysts for homo- and copolymerization of ethylene and the polymers
obtained by use thereof
    5.
    发明授权
    Catalysts for homo- and copolymerization of ethylene and the polymers obtained by use thereof 失效
    用于乙烯均聚和共聚的催化剂和通过其使用得到的聚合物

    公开(公告)号:US4695558A

    公开(公告)日:1987-09-22

    申请号:US713557

    申请日:1985-03-19

    CPC分类号: C08F10/00

    摘要: Disclosed are catalysts for the polymerization of ethylene and of mixtures thereof with olefins, comprising the product obtained by reacting the following components:(a) an Al-alkyl compound;(b) an electron-donor compound containing at least a nitrogen atom, said compound being reactive towards MgCl.sub.2, but not towards Al-triethyl; and(c) the reaction product between a titanium compound containing at least a titanium-halogen bond and an anhydrous magnesium halide.The obtained (co)polymers have a very narrow molecular weight distribution which renders them particularly suitable for some applications, such as injection molding.

    摘要翻译: 公开了用于乙烯及其与烯烃的混合物的聚合的催化剂,其包括通过使以下组分反应获得的产物:(a)Al-烷基化合物; (b)至少含有氮原子的电子给体化合物,所述化合物对MgCl 2是反应性的,但不对三乙基铝反应; 和(c)至少含有钛 - 卤素键的钛化合物与无水卤化镁之间的反应产物。 获得的(共)聚合物具有非常窄的分子量分布,使得它们特别适用于一些应用,例如注射成型。

    Crystalline copolymers of propylene
    6.
    发明授权
    Crystalline copolymers of propylene 失效
    丙烯的结晶共聚物

    公开(公告)号:US06355758B1

    公开(公告)日:2002-03-12

    申请号:US08473006

    申请日:1995-06-07

    IPC分类号: C08F1004

    摘要: Novel crystalline copolymers of propylene with minor proportions of ethylene and/or alpha-olefins, endowed with very good mechanical properties, a low melting point and a limited solubility in xylene at 25° C., and the process for preparing them by means of the polymerization of mixtures of propylene with ethylene and/or alpha-olefins of suitable composition, by using catalysts obtained from stereorigid and chiral compounds of zirconium, and methylalumoxanic compounds.

    摘要翻译: 丙烯与较少比例的乙烯和/或α-烯烃的新型结晶共聚物具有非常好的机械性能,在25℃下具有低熔点和在二甲苯中的溶解度有限的方法,以及通过 通过使用由立体刚性和锆的手性化合物得到的催化剂和甲基铝氧烷化合物,聚合丙烯与乙烯和/或合适组成的α-烯烃的混合物。