Olefin polymerization catalyst and process for preparing polypropylene and a propylene block copolymer
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0641807A2
公开(公告)日:1995-03-08
The present invention provides olefin polymerization catalysts and processes for preparing a polypropylene and a propylene block copolymer using said olefin polymerization catalysts.
The olefin polymerization catalyst (1) of the invention is formed from:
[I-1] a contact product obtained by contacting:
(A) a solid titanium catalyst component,
(B) an organometallic compound catalyst component, and
(C) a specific organosilicon compound;
[II-1]
(D) a specific polyether compound; and optionally,
[III] an organometallic compound catalyst component.
The olefin polymerisation catalyst (2) of the invention is formed from:
[I-2] a contact product obtained by contacting:
(A) a solid titanium catalyst component,
(B) an organometallic compound catalyst component, and
(D) a specific polyether compound;
[II-2]
(C) a specific organosilicon compound; and optionally,
[III] an organometallic compound; catalyst component.
In the processes for preparing polypropylene propylene is polymerized in the presence of the above-mentioned olefin polymerization catalysts and highly isotactic polypropylene can be obtained.
The processes for preparing a propylene block copolymer comprises the steps of polymerizing propylene to form a polypropylene component and copolymerizing ethylene and an α-olefin of 3 to 20 carbon atoms to form an ethylene/α-olefin copolymer component, in an optional order, in the presence of the specific polymerization catalysts, which is highly isotactic and the rubber component has a high intrinsic viscosity [η].
本发明提供了烯烃聚合催化剂和使用所述烯烃聚合催化剂制备聚丙烯和丙烯嵌段共聚物的工艺。
本发明的烯烃聚合催化剂(1)由以下材料制成:
[I-1]通过以下方式获得的接触产物:
(A) 固体钛催化剂组分、
(B) 有机金属化合物催化剂组分,和
(C) 特定的有机硅化合物;
[II-1]
(D) 一种特定的聚醚化合物;和任选地、
[III] 有机金属化合物催化剂组分。
本发明的烯烃聚合催化剂(2)由以下物质组成:
[I-2]通过以下方式获得的接触产物:
(A) 固体钛催化剂组分、
(B) 有机金属化合物催化剂组分,和
(D) 特定聚醚化合物;
[II-2]
(C)一种特定的有机硅化合物;和任选的、
[III] 一种有机金属化合物;催化剂组分。
在制备聚丙烯的工艺中,丙烯在上述烯烃聚合催化剂的存在下进行聚合,可以得到高同素异形聚丙烯。
制备丙烯嵌段共聚物的工艺包括以下步骤:在特定聚合催化剂存在下,将丙烯聚合形成聚丙烯组分,并按任选顺序将乙烯和 3 至 20 个碳原子的α-烯烃共聚形成乙烯/α-烯烃共聚物组分,该组分具有高同素异形性,且橡胶组分具有高固有粘度[η]。