Mixed metal catalysts
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorDonna Marie Brown
Life of this patent
Estimating the term…
Abstract
A composition comprising (i) a supported or unsupported magnesium/titanium based catalyst precursor including an electron donor and (ii) a lanthanide catalyst precursor represented by the following formula: CpaLnRbbLc wherein Cp is a cyclopentadienyl or substituted cyclopentadienyl ligand; Ln is a lanthanide metal; Rb is a hydride, alkyl, silyl, halide, or aryl group; L is an electron donor; a+b is the valence of the lanthanide metal; and c is a sufficient amount of electron donor to stabilize the lanthanide metal.
Claims8
An catalyst composition for polymerization of olefins comprising:
- (ia) a supported or unsupported magnesium/titanium based catalyst precursor including an electron donor,
- (ib) a cocatalyst compound of the formula RnAlX3-n wherein each R is independently a saturated aliphatic hydrocarbon radical having 1 to 14 carbon atoms;
- each X is a halogen, and n is 1 to 3;
- and
- (ii) bis(pentamethylcyclopentadienyl)samarium (THF)2.
An catalyst composition for polymerization of olefins comprising:
- (ia) a supported or unsupported magnesium/titanium based catalyst precursor including an electron donor corresponding to the formula:
- MgdTi(ORe)eXf(ED)g, wherein R is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms or COR′ wherein R′ is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms;
- each ORe group is the same or different;
- X is independently chlorine, bromine or iodine;
- ED is an electron donor;
- d is 0.5 to 56;
- e is 0, 1, or 2;
- f is 2 to 116;
- and g is 1.5d+2
- (ib) a cocatalyst compound of the formula RnAlX3-n wherein each R is independently a saturated aliphatic hydrocarbon radical having 1 to 14 carbon atoms;
- each X is a halogen, and n is 1 to 3;
- and
- (ii) a lanthanide compound represented by the following formula:
- CpaLnRbbLc wherein Cp is a cyclopentadienyl or substituted cyclopentadienyl ligand;
- Ln is a lanthanide metal;
- Rb is a hydride, alkyl, silyl, halide, or aryl group;
- L is an electron donor;
- a+b is the valence of the lanthanide metal;
- and c is a number from 1 to 8.
Dependencies are inferred from the claim text.