Components and catalysts for the polymerization of olefins
申请人:Gulevich Yuri
公开号:US20070106039A1
公开(公告)日:2007-05-10
The present invention relates to a solid catalyst component for the polymerization of olefins CH
2
═CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and an electron donor selected from thiophene dicarboxylate derivatives of a particular formula. Said catalyst components when used in the polymerization of olefins, and in particular of propylene, are capable to give polymers in high yields and with high isotactic index expressed in terms of high xylene insolubility.
A process for preparing a polyolefin by homopolymerizing or copolymerizing an olefin or olefins using a catalyst comprising a solid catalyst component and an organometallic compound, said solid catalyst component being obtained by contacting at least a titanium compound and/or a vanadium compound with a solid material (a), said solid material (a) being obtained by contacting the following components (1), (2) and (3) with one another:
(1) a silicon oxide and/or an aluminum oxide,
(2) a magnesium halide, and
(3) an organometallic compound.