Patent ID: 7935651
Filing Date: 2011-05-03
Classification: C08F

Abstract:
1. A method for preparing a titanium-containing Ziegler-Natta catalyst, said method comprising: a) combining a dialkyl magnesium compound, a trialkyl aluminum compound, and a polymethylhydrosiloxane in a first hydrocarbon solvent; b) combining the product from step (a) with dry, alcohol-free magnesium chloride; c) washing a solid product isolated from step (b) with a second hydrocarbon solvent; and d) combining the washed solid product with an aluminum compound selected from the group consisting of alkyl aluminum dichlorides and dialkyl aluminum chlorides to give the catalyst; wherein titanium is introduced as a titanium alkoxide in step (a), during preparation of the magnesium chloride used in step (b), or both.