Patent ID: 6664209
Filing Date: 2003-12-16
Classification: C08F

Abstract:
A solid catalyst component, which can be used for polymerization of a propylene, the solid catalyst component being prepared bysuspending a dialkoxymagnesium (a) in an aromatic hydrocarbon (d) to make a suspension, where the dialkoxymagnesium (a) contains two alkoxy groups each independently having from 1 to 6 carbon atoms, and then contacting a tetravalent halogen-containing titanium compound (b) with the suspension, and then carrying out a reaction process, wherein before or after the tetravalent halogen-containing titanium compound (b) is contacted with the suspension, one or more species of diesters of maleic acid each having a straight-chain or branched chain alkyl group having a carbon number of 2 to 8 (c) is contacted with the suspension.