会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Process for producing ethylene-propylene block copolymer
    • 生产乙烯 - 丙烯嵌段共聚物的方法
    • US5473021A
    • 1995-12-05
    • US176917
    • 1994-01-03
    • Hiroyuki KouraTakeshi EbaraKazuki WakamatsuShozo KawamataYoshizumi Sasaki
    • Hiroyuki KouraTakeshi EbaraKazuki WakamatsuShozo KawamataYoshizumi Sasaki
    • C08F4/658C08F4/60C08F4/654C08F4/80C08F210/16C08F297/08
    • C08F297/083
    • A process for producing ethylene-propylene block copolymer which comprises(1) The first step of reacting propylene or a mixture of propylene and ethylene in the presence of a catalyst composed essentially of(A) a solid catalyst component containing magnesium, titanium and a halogen as the indispensable ingredients,(B) an organoaluminum compound, and(C) a silicon compound (1) represented by the formula R.sup.1 R.sup.2 Si(OR.sup.3).sub.2, wherein R.sup.1 is an alicyclic hydrocarbon group of 5-20 carbon atoms and R.sup.2 and R.sup.3 are each independently a hydrocarbon group of 1-20 carbon atoms, to form a propylene homopolymer portion or an ethylene-propylene copolymer portion having an ethylene content of 3% by weight or less, in an amount corresponding to 50-95% by weight of the total block copolymer amount, and(2) the second step of reacting a mixture of ethylene and propylene with the polymer portion obtained in the first step in the presence of the aforesaid catalyst composed essentially of the components (a), (b) and (c) and in the additional presence of a silicon compound (2) represented by the formula R.sup.4.sub.a Si(OR.sup.5).sub.4-a, wherein R.sup.4 and R.sup.5 are each independently a hydrocarbon group of 1-20 carbon atoms and a is a number satisfying the equation 0.ltoreq.a
    • 一种生产乙烯 - 丙烯嵌段共聚物的方法,其包括(1)在主要由(A)含有镁,钛和卤素的固体催化剂组分的催化剂存在下使丙烯或丙烯与乙烯的混合物反应的第一步骤 作为不可或缺的成分,(B)有机铝化合物和(C)由式R 1 R 2 Si(OR 3)2表示的硅化合物(1),其中R 1是5-20个碳原子的脂环族烃基,R 2和R 3是 各自独立地是1-20个碳原子的烃基,以形成丙烯均聚物部分或乙烯含量为3重量%以下的乙烯 - 丙烯共聚物部分,其量相当于所述乙烯含量的50-95重量% 总共嵌段共聚物量,和(2)在上述主要由组分(a),(b)组成的催化剂存在下,使乙烯和丙烯的混合物与第一步获得的聚合物部分反应的第二步骤, 和(c),另外存在由式R4aSi(OR5)4-a表示的硅化合物(2),其中R4和R5各自独立地为1-20个碳原子的烃基,a为满足 方程式0 <= a <4,得到乙烯 - 丙烯嵌段共聚物,其含有乙烯含量为至少20重量%的乙烯 - 丙烯共聚物部分,其量相当于5-50重量% 总嵌段共聚物量。