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US 2001/0018534 A1Published application
Aluminum complexes for olefin polymerization
AssigneeThe Governors of the University of Alberta
InventorsRonald G. Cavell, Qinyan Wang, Ruppa P. Kamalesh Babu, Aparna Kasani
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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 which are useful in the polymerization of olefins.
Claims29
A process for preparing a complex of aluminum and a bridged phosphinimine comprising reacting moles of a bridged phosphinimine compound of the formula I:
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- wherein each R1 is independently selected from the group consisting of C1-8 straight or branched alkyl radical or a C16-12 cyclic aliphatic or aromatic radical;
- radicals of the formula Si(R4)3 wherein each R4 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- and R3 is selected from the group consisting of C1-8 alkyl radicals and C16-12 aromatic radicals which are unsubstituted or substituted with one or more halogen atoms or a C1-4 alkyl radical with an aluminum compound of the formula III (Al(R2)3-nXn) wherein each R2 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and n is 0, 1 or 2 under an inert atmosphere, in an inert hydrocarbyl solvent or diluent at a temperature from 50° C. to 200° C., provided that if the molar ratio of compound of formula I to aluminum compound is from 0.8 to 1.20;
- R3 can not be phenyl if R1 is trimethyl silyl, X is chlorine and n is 2.
2 more elements
A complex of formula IV:
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- wherein each R1 is independently selected from the group consisting of C1-8 straight or branched alkyl radical or a C6-12 cyclic aliphatic or aromatic radical;
- radicals of the formula Si(R4)3 wherein each R4 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- R2 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and a is 1 or 2;
- and R3 is selected from the group consisting of C1-8 alkyl radicals and C6-12 aromatic radicals which are unsubstituted or substituted with one or more halogen atoms or a C1-4 alkyl radical.
2 more elements
A complex of the formula V:
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- wherein each R1 is independently selected from the group consisting of C1-8 straight or branched alkyl radical or a C6-12 cyclic aliphatic or aromatic radical;
- radicals of the formula Si(R4)3 wherein each R4 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- R2 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and a is 1 or 2;
- and R3 is selected from the group consisting of C1-8 alkyl radicals and C6-12 aromatic radicals which are unsubstituted or substituted with one or more halogen atoms or a C1-4 alkyl radical, provided that R3 can not be phenyl if R1 is trimethyl silyl, X is chlorine and n is 2.
2 more elements
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 V:
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- wherein each R1 is independently selected from the group consisting of C1-8 straight or branched alkyl radical or a C6-12 cyclic aliphatic or aromatic radical;
- radicals of the formula Si(R4)3 wherein each R4 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- R2 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and a is 1 or 2;
- and R3 is selected from the group consisting of C1-8 alkyl radicals and C6-12 aromatic radicals which are unsubstituted or substituted with one or more halogen atoms or a C1-4 alkyl radical 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 R9 is independently selected from the group consisting of a hydrogen atom and a C1-4 alkyl radical;
- and an activator of the formula [B(R8)3] wherein R18 is as defined above, to provide a molar ratio of B:Al from 0.8 to 1.2;
- and
- (iii) a mixture of (i) and (ii) above.
8 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 V:
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- wherein each R1 is independently selected from the group consisting of C1-8 straight or branched alkyl radical or a C6-12 cyclic aliphatic or aromatic radical;
- radicals of the formula Si(R4)3 wherein each R4 is independently selected from the group consisting of C1-8 alkyl and alkoxy radicals;
- R2 is independently selected from the group consisting of C1-8 alkyl radicals, X is a halogen atom and a is 1 or 2;
- and R3 is selected from the group consisting of C1-8 alkyl radicals and C6-12 aromatic radicals which are unsubstituted or substituted with one or more halogen atoms or a C1-4 alkyl radical 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 0.8 to 1.2;
- and
- (iii) a mixture of (i) and (ii) above.
8 more elements
Dependencies are inferred from the claim text.