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US 5,852,146 AGranted
Catalyst for the production of olefin polymers
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsWalter Thomas Reichle, Frederick John Karol
Life of this patent
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Abstract
A catalyst composition for the polymerization of olefins is provided, comprising a bis(hydroxy aromatic nitrogen ligand) transition metal catalyst precursor and an activating cocatalyst.
Claims9
A catalyst precursor having a formula selected from the group consisting of:
- ##STR7## wherein M is a metal selected from the group consisting of Group IIIB to VIII and Lanthanide series elements;
- each X is selected from the group consisting of hydrogen, aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radicals having 1-20 carbon atoms, --NR.sub.2 or RCO.sub.2 -- wherein R is a hydrocarbon radical having 1 to 20 carbon atoms and halogens;
- o is 0, 1, 2, or 3 depending on the valence of M;
- each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is a hydrocarbon group containing 1 to 20 carbon atoms and two or more adjacent R.sup.1, R.sup.2, R.sup.3, or R.sup.4 groups may be joined to form an aliphatic or aromatic ring;
- Y is a bivalent bridging group or a bond;
- each m is independently from 0 to 4;
- and n is 1.
4 more elements
A catalyst composition comprising a catalyst precursor having a formula selected from the group consisting of:
- ##STR9## wherein M is a metal selected from the group consisting of Group IIIB to VIII and Lanthanide series elements;
- each X is selected from the group consisting of hydrogen, aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radicals having 1-20 carbon atoms, --NR.sub.2 or RCO.sub.2 -- wherein R is a hydrocarbon radical having 1 to 20 carbon atoms, and halogens;
- o is 0, 1, 2, or 3 depending on the valence of M;
- each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is a hydrocarbon group containing 1 to 20 carbon atoms and two or more adjacent R.sup.1, R.sup.2, R.sup.3, or R.sup.4 groups may be joined to form an aliphatic or aromatic ring;
- Y is a bivalent bridging group or a bond;
- each m is independently from 0 to 4;
- and n is 1;
- and an activating cocatalyst.
5 more elements
A process for producing an olefin polymer, which comprises contacting at least one olefin monomer under polymerization conditions with a catalyst composition comprising:
- a) a catalyst precursor having a formula selected from the group consisting of:
- ##STR11## wherein M is a metal selected from the group consisting of Group IIIB to VIII and Lanthanide series elements;
- each X is a monovalent or bivalent anion;
- o is 0, 1, 2, or 3 depending on the valence of M;
- each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is a hydrocarbon group containing 1 to 20 carbon atoms and two or more adjacent R.sup.1, R.sup.2, R.sup.3, or R.sup.4 groups may be joined to form an aliphatic or aromatic ring;
- Y is a bivalent bridging group or a bond;
- and each m is independently from 0 to 4;
- and n is 1;
- and b) an activating cocatalyst.
6 more elements
Dependencies are inferred from the claim text.