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US 4,391,738 AGranted
Catalyst for olefinic polymerization
AssigneeExxon Research & Engineering Co.
InventorArthur W. Langer, Jr.
Life of this patent
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Abstract
A new improved catalyst system for alpha-olefin type polymerizations includes a metal alkyl compound selected from the group consisting of R.sub.2 WY or R.sub.3 W and an organomagnesium compound R'MgX in combination with a Group IVB-VIII transition metal compound. The improved catalyst system provides both increased polymerization activity and polymers having a high degree of isotactic stereoregularity.
Claims1
An improved catalyst composition adaptable for use in an alpha-olefin polymerization which consists of:
- (a) TiCl.sub.4 supported on MgCl.sub.2, said TiCl.sub.4 supported on MgCl.sub.2 prepared by ball milling said TiCl.sub.4, MgCl.sub.2 and ethyl benzoate;
- (b) diethylaluminum chloride;
- and
- (c) a mono-organomagnesium compound having the formula:
- R'MgX
- wherein R' is a sec-butyl group and X is selected from the group consisting of Cl, OOC.phi., OC.sub.15 H.sub.31, OC.sub.2 H.sub.5, SC.sub.12 H.sub.25 and Os-Bu.
3 more elements
Dependencies are inferred from the claim text.