Olefin polymerization catalyst and process for preparing polypropylene and propylene block copolymer
申请人:——
公开号:US20010044375A1
公开(公告)日:2001-11-22
Olefin polymerization catalysts are 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,
(D) a specific polyether compound and, optionally,
(II-1)
(III) an organometallic compound catalyst component; or
(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 compounds,
(C) a specific organosilicon compound, and, optionally,
(II-2)
(III) an organometallic compound catalyst component; or
the contact product (I-1) or (I-2) may be replaced by one which is obtained by prepolymerizing an olefin of 2 or more carbon atoms in the presence of the catalyst components for the contact product (I-1) or (I-2).
烯烃聚合催化剂是由以下成分形成的:(I-1)通过接触(A)固体钛催化剂成分,(B)有机金属化合物催化剂成分和(C)特定的有机硅化合物,(D)特定的聚醚化合物以及可选的(II-1)(III)有机金属化合物催化剂成分;或者(I-2)通过接触(A)固体钛催化剂成分,(B)有机金属化合物催化剂成分和(D)特定的聚醚化合物,(C)特定的有机硅化合物以及可选的(II-2)(III)有机金属化合物催化剂成分获得的接触产物;或者接触产物(I-1)或(I-2)可以被在催化剂成分的存在下预聚合2个或更多碳原子的烯烃所取代。