Imino-amide catalyst compositions for the polymerization of olefins
AssigneeUnivation Technologies, LLC
InventorRex Eugene Murray
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Abstract
A family of novel imino-amide catalyst precursors and catalysts useful for the polymerization of olefins, such as ethylene, higher alpha-olefins, dienes, and mixtures thereof.
Claims41
A catalyst precursor composition represented by one or more:
- 36
- wherein T is a bridging group containing 2 or more bridging atoms;
- M is a metallic element selected from Groups 1 to 15, and the Lanthanide series of the Periodic Table of the Elements,
- Z is a coordination ligand;
- each L is a monovalent, bivalent, or trivalent anionic ligand;
- n is an integer from 1 to 6;
- m is an integer from 1 to 3;
- X and Y are heteroatoms each independently selected from nitrogen, oxygen, sulfur, and phosphorus;
- R is a non-bulky substituent that has relatively low steric hindrance with respect to X;
- and
- R′ is a bulky substituent that is sterically hindering with respect to Y.
The catalyst precursor of claim 16 wherein the R′ substituent has one or more of its carbon or hydrogen positions substituted with an element selected from Groups 14 to 17 of the Periodic Table of the Elements, other than carbon.
A catalyst composition comprising:
- a) a catalyst precursor represented by one of the formulae selected from:
- 40
- wherein T is a bridging group containing 2 or more bridging atoms;
- M is a metallic element selected from Groups 1 to 15, and the Lanthanide series of the Periodic Table of the Elements,
- Z is a coordination ligand;
- each L is a monovalent, bivalent, or trivalent anionic ligand;
- n is an integer from 1 to 6;
- m is an integer from 1 to 3;
- X and Y are heteroatoms each independently selected from nitrogen, oxygen, sulfur, and phosphorus;
- R is a non-bulky substituent that has relatively low steric hindrance with respect to X;
- and
- R′ is a bulky substituent that is sterically hindering with respect to Y;
- and
- b) an activating cocatalyst.
A catalyst precursor selected from the group consisting of those represented by:
- 45
- wherein T is a bridging group containing less than 10 non-hydrogen atoms, at least 2 of which are linking atoms with respect to the nitrogen atoms and wherein at least one of the bridging atoms is a carbon atom;
- M is selected from Hf and Zr;
- each L is a ligand containing from about 1 to 20 non-hydrogen atoms and is selected from the group consisting of alkyl, arylalkyl and halogen containing groups;
- n is an integer from 1 to 3;
- R is a non-bulky substituent selected from the C1 to C10 straight chain alkyl groups;
- and
- R′ is a bulky substituent that is sterically hindering with respect to which it is bonded and contains 4 to 20 non-hydrogen atoms and is selected from alkyl, alkenyl, cycloalkyl, heterocyclic, alkylaryl, and arylalkyl groups.
A catalyst composition for the polymerization of olefins which catalyst composition is the reaction product of:
- 46
- wherein T is a bridging group containing less than 10 non-hydrogen atoms, at least 2 of which are linking atoms with respect to the nitrogen atoms and wherein at least one of the bridging atoms is a carbon atom;
- M is selected from Hf and Zr;
- each L is a ligand containing from about 1 to 20 non-hydrogen atoms and is selected from the group consisting of alkyl, arylalkyl and halogen containing groups;
- n is an integer from 1 to 3;
- R is a non-bulky substituent selected from the C1 to C10 straight chain alkyl groups;
- and
- R′ is a bulky substituent that is sterically hindering with respect to which it is bonded and contains 4 to 20 non-hydrogen atoms and is selected from alkyl, alkenyl, cycloalkyl, heterocyclic, alkylaryl, and arylalkyl groups.
Dependencies are inferred from the claim text.