申请人:UNION CARBIDE CORPORATION
公开号:EP0298453A1
公开(公告)日:1989-01-11
A process for the production of a product comprising ethylene/propylene copolymer incorporated into a matrix of propylene homopolymer or copolymer comprising the following steps:
(a) contacting propylene or propylene and at least one alpha-olefin having 2 to 8 carbon atoms, and hydrogen, wherein the alpha-olefin is present in a ratio of about 0.01 to about 0.06 mole of alpha-olefin per mole of propylene and the hydrogen is present in a ratio of about 0.001 to about 0.45 mole of hydrogen per mole of combined propylene and alpha-olefin, with a catalyst comprising (i) a catalyst precursor, which includes titanium, magnesium, chlorine, and an electron donor; (ii) a hydrocarbylaluminum cocatalyst; and (iii) a selectivity control agent, which is different from the electron donor, in a first reactor in such a manner that a mixture of a homopolymer of propylene or a copolymer of propylene and alpha-olefin together with active catalyst is produced;
(b) passing the mixture from step (a) into a second reactor; and
(c) adding to the second reactor:
(i) a sufficient amount of ethylene and propylene to provide ethylene/propylene copolymer in an amount of about 20 percent to about 45 percent by weight, based on the weight of the product. said ethylene and propylene being introduced in a ratio of about 10 to about 100 moles of ethylene per mole of propylene; and
(ii) hydrogen in a mole ratio of about 0.1 to about 1.0 mole of hydrogen per mole of combined ethylene and propylene; and
d) effecting the copolymerization of ethylene and propylene in the second reactor in such a manner that the product is produced.
一种生产乙烯/丙烯共聚物与丙烯均聚物或共聚物基体结合的产品的工艺,包括以下步骤:
(a) 使丙烯或丙烯与至少一种具有 2 至 8 个碳原子的α-烯烃和氢接触,其中 α-烯烃的存在比例为每摩尔丙烯含有约 0.01 至约 0.06 摩尔α-烯烃,氢的 存在比例为每摩尔丙烯含有约 0.001 至约 0.45摩尔氢/每摩尔丙烯和α-烯烃的组合,催化剂包括(i)催化剂前体,其中包括钛、镁、氯和电子供体;(ii)烃基铝助催化剂;和(iii)选择性控制剂,它不同于电子供体,在第一反应器中,以这样的方式产生丙烯均聚物或丙烯和α-烯烃共聚物与活性催化剂的混合物;
(b) 将来自步骤(a)的混合物通入第二反应器;以及
(c) 加入第二反应器:
(i) 足量的乙烯和丙烯,以提供乙烯/丙烯共聚物,乙烯和丙烯的重量比为每摩尔丙烯含约 10 至约 100 摩尔乙烯;以及
(ii) 氢气,其摩尔比为每摩尔乙烯和丙烯的混合物含约 0.1 至约 1.0 摩尔氢气;以及
d) 在第二反应器中实现乙烯和丙烯的共聚,以生产出产品。