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US 6,444,834 B1Granted
Aluminum complexes for olefin polymerization
AssigneeThe Governors of the University of Alberta
InventorsRonald G. Cavell, Qinyan Wang, Aparna Kasani
Life of this patent
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Abstract
It is known to polymerize olefins using transition metal complexes and/or compounds. There is an ongoing search for catalysts for olefin polymerization which do not rely on transition metals as the active center. The present invention provides novel aluminum phosphinimine complexes, containing additional heteroatoms which are useful in the polymerization of olefins.
Claims2
A process for polymerizing one or more C2-8 olefins at a temperature from 20° C. to 120° C. and at a pressure from 15 to 4500 psig in the presence of a complex of the formula:
- wherein each R1 is independently selected from the group consisting of a C1-8 straight or branched alkyl radical, a C6-12 cyclic aliphatic or aromatic radical and a radical of the formula Si(R6)3 wherein each R6 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- R2 is selected from the group consisting of C1-8 straight chained, branched or cyclic aliphatic radicals and C6-12 cyclic aliphatic and aromatic radicals;
- c is 0 or 1;
- each R3 is independently selected from the group consisting of C1-8 alkyl radicals and C6-12 aromatic radicals which are unsubstituted or substituted by one or more substituents selected from the group consisting of halogen atoms and C1-4 alkyl radicals;
- each R4 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and b is 1 or 2;
- R5 is selected from the group consisting of C1-8 straight chained, branched or cyclic aliphatic radicals and C6-12 cyclic aliphatic and aromatic radicals;
- Y is a heteroatom selected from the group consisting of an oxygen atom, a nitrogen atom and a sulfur atom and a is an integer so that the valence state of Y−2=a;
- and
- an activator selected from the group consisting of:
- (i) aluminoxane compounds R202AlO(R20AlO)mAlR202 wherein each R20 is independently selected from the group consisting of C1-20 hydrocarbyl radical and m is from 5 to 30 to provide a molar ratio of aluminum in the activator to aluminum in the complex from 20:1 to 1000:1;
- (ii) anions of the formula [B(R18)4]− wherein each R18 is independently selected from the group consisting of phenyl radicals which are unsubstituted or substituted by up to 5 substituents selected from the group consisting of a fluorine atom, a C1-4 alkyl or alkoxy radical which is unsubstituted or substituted by a fluorine atom and a silyl radical of the formula —Si(R19)3;
- wherein each R19 is independently selected from the group consisting of a hydrogen atom and a C1-4 alkyl radical;
- and an activator of the formula [B(R18)3] wherein R18 is as defined above, to provide a molar ratio of B:Al from 0.4 to 1.2;
- and
- (iii) a mixture of (i) and (ii) above.
12 more elements
A process for polymerizing one or more C2-8 olefins at a temperature from 120° C. to 250° C. and at a pressure from 15 to 4500 psig in the presence of a complex of the formula:
- wherein each R1 is independently selected from the group consisting of a C1-8 straight or branched alkyl radical, a C6-12 cyclic aliphatic or aromatic radical and a radical of the formula Si(R6)3 wherein each R6 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- R2 is selected from the group consisting of C1-8 straight chained, branched or cyclic aliphatic radicals and C6-12 cyclic aliphatic and aromatic radicals;
- c is 0 or 1;
- each R3 is independently selected from the group consisting of C1-8 alkyl radicals and C6-12 aromatic radicals which are unsubstituted or substituted by one or more substituents selected from the group consisting of halogen atoms and C1-4 alkyl radicals;
- each R4 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and b is 1 or 2;
- R5 is selected from the group consisting of C1-8 straight chained, branched or cyclic aliphatic radicals and C6-12 cyclic aliphatic and aromatic radicals;
- Y is a heteroatom selected from the group consisting of an oxygen atom, a nitrogen atom and a sulfur atom and a is an integer so that the valence state of Y−2=a;
- and
- an activator selected from the group consisting of:
- (i) aluminoxane compounds R202AlO(R20AlO)mAlR202 wherein each R20 is independently selected from the group consisting of C1-20 hydrocarbyl radical and m is from 5 to 30 to provide a molar ratio of aluminum in the activator to aluminum in the complex from 20:1 to 1000:1;
- (ii) anions of the formula [B(R18)4]− wherein each R18 is independently selected from the group consisting of phenyl radicals which are unsubstituted or substituted by up to 5 substituents selected from the group consisting of a fluorine atom, a C1-4 alkyl or alkoxy radical which is unsubstituted or substituted by a fluorine atom and a silyl radical of the formula —Si(R19)3;
- wherein each R19 is independently selected from the group consisting of a hydrogen atom and a C1-4 alkyl radical;
- and an activator of the formula [B(R18)3] wherein R18 is as defined above, to provide a molar ratio of B:Al from 0.4 to 1.2;
- and
- (iii) a mixture of (i) and (ii) above 2.
12 more elements
Dependencies are inferred from the claim text.