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US 5,321,106 AGranted
Addition polymerization catalyst with oxidative activation
AssigneeThe Dow Chemical Company
InventorRobert E. LaPointe
Life of this patent
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Abstract
Addition polymerization catalysts comprising a derivative of a Group 4 or Lanthanide metal compound prepared by oxidative activation, a process for preparation and an addition polymerization method utilizing such catalysts.
Claims23
A composition useful as a catalyst in addition polymerizations and substantially lacking in byproducts that interfere with the polymerization process, said composition corresponding to the formula:
- ##STR4## wherein:
- M is a metal of Group 4 or the Lanthanide series of the Periodic Table of Elements;
- Cp* is cyclopentadienyl group wherein each carbon atom in the cyclopentadienyl radical may be unsubstituted or substituted with the same or a different radical selected from the group consisting of C.sub.1-20 hydrocarbyl radicals, C.sub.1-20 substituted hydrocarbyl radicals wherein one or more hydrogen atoms of the hydrocarbyl group is replaced by a halogen atom, C.sub.1-20 hydrocarbyl substituted metalloid radicals wherein the metalloid is selected from Group 14 of the Periodic Table of Elements, and halogen radicals;
- or two or more such substituents may together form a fused ring system;
- Z is a divalent moiety comprising oxygen, boron, or a member of Group 14 of the Periodic Table of the Elements;
- Y is a linking group comprising nitrogen phosphorus, oxygen, or sulfur or optionally Z and Y together form a fused ring system;
- X is hydride or a C.sub.1-10 hydrocarbyl group;
- and
- A.sup.- is a monovalent compatible, noncoordinating anion corresponding to the formula:
- [BX.sub.1 X.sub.2 X.sub.3 X.sub.4 ].sup.-
- wherein X.sub.1 to X.sub.4 are the same of different nonreactive, organyl or silyl radicals containing from 6 to 20 carbon or silicon atoms and lacking in reactive hydrogen moieties, and two or more of X.sub.1 to X.sub.4 may be linked to each other through a stable bridging group.
8 more elements
A process for preparing a composition useful as a catalyst in addition polymerizations and substantially lacking in byproducts that interfere with the polymerization process, said composition corresponding to the formula:
- ##STR5## wherein:
- M is a metal of Group 4 or the Lanthanide series of the Periodic Table of Elements;
- Cp* is cyclopentadienyl group wherein each carbon atom in the cyclopentadienyl radical may be unsubstituted or substituted with the same or a different radical selected from the group consisting of C.sub.1-20 hydrocarbyl radicals, C.sub.1-20 substituted hydrocarbyl radicals wherein one or more hydrogen atoms of the hydrocarbyl group is replaced by a halogen atom, C.sub.1-20 hydrocarbyl substituted metalloid radicals wherein the metalloid is selected from Group 14 of the Periodic Table of Elements, and halogen radicals;
- or two or more such substituents may together form a fused ring system;
- Z is a divalent moiety comprising oxygen, boron, or a member of Group 14 of the Periodic Table of the Elements;
- Y is a linking group comprising nitrogen phosphorus, oxygen, or sulfur or optionally Z and Y together form a fused ring system;
- X is hydride or a C.sub.1-10 hydrocarbyl group;
- and
- A.sup.- is a monovalent compatible, noncoordinating anion corresponding to the formula:
- [BX.sub.1 X.sub.2 X.sub.3 X.sub.4 ].sup.-
- wherein X.sub.1 to X.sub.4 are the same of different nonreactive, organyl or silyl radicals containing from 6 to 20 carbon or silicon atoms and lacking in reactive hydrogen moieties, and two or more of X.sub.1 to X.sub.4 may be linked to each other through a stable bridging group, said process comprising contacting a derivative of a Group 4 or Lanthanide metal corresponding to the formula:
- ##STR6## wherein Cp*, Z, Y, M and X are as previously defined;
- with an oxidizing agent which in reduced form is noninterfering with the resulting catalyst, said oxidizing agent comprising a cationic oxidizer and a compatible noncoordinating anion and corresponding to the formula:
- (Ox.sup.+a).sub.b (A.sup.-).sub.d
- wherein Ox.sup.+a is a cationic oxidizer having a charge of +a comprising an organic or inorganic ion having an oxidation potential sufficient to cause molecular oxidation of the metal derivative so as to form a catalytic species;
- b and d are integers selected to provide charge balance;
- and A.sup.- is as previously defined.
14 more elements
Dependencies are inferred from the claim text.