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US 6,187,712 B1Granted
Catalyst composition for the polymerization of olefins
AssigneeUnivation Technologies, LLC
InventorThomas Henry Peterson
Life of this patent
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Abstract
A catalyst composition for the polymerization of olefins is provided. The catalyst composition comprises a mono- or biscycloalkadienyl catalyst precursor comprising at least one protected hydride ligand or protected hydrocarbyl ligand bound to a metal atom plus a cocatalyst. The protected hydride ligand is preferably a borohydride ligand.
Claims15
A catalyst composition for the polymerization of olefins comprising:
- a) a catalyst precursor of the formula LxMn+(A)y[RzZ](n−x−y), wherein each L is a cycloalkadienyl ligand;
- M is an element selected from Groups 3 to 6 and the Lanthanides;
- each A Is an anionic group;
- each R is a carbon containing group or hydrogen;
- each Z is boron or aluminum and is bridged to M via P;
- x is 1 or 2;
- n is the valence of M;
- and y is an integer from 0 to 7 ;
- z is an integer from 1 to 4;
- and (n−x−y) is a positive integer;
- and
- b) a cocatalyst.
9 more elements
A process for the polymerization of olefins, which comprises contacting olefins under polymerization conditions with a catalyst composition comprising:
- a) a catalyst precursor of the formula LxMn+(A)y[RzZ](n−x−y) ;
- wherein each L is a cycloalkadienyl ligand;
- M is an element selected from Groups 3 to 6 and the Lanthanides;
- each A is an anionic group;
- each R is carbon containing group or hydrogen;
- each Z is boron or aluminum and is bridged to M via R;
- x is 1 or 2;
- n is the valence of M;
- y is an integer from 0 to 7;
- z is an integer from 1 to 4;
- and (n−x−y) is a positive integer;
- and
- b) a cocatalyst.
10 more elements
Dependencies are inferred from the claim text.