| abstract |
An olefin polymerization catalyst includes a halogen-containingnmagnesium compound; a titanium compound; and annadditive selected from the group consisting of (a) a mixturenof an aluminum alkoxide compound and polydimethylsiloxane,n(b) an aluminosiloxane, (c) the reaction product of annaluminum alkyl and calixarene, (d) the reaction product ofnan aluminum alkyl and cyclodextrin, and mixtures of (a)-(d). |