Zirconium containing catalysts and method of use
This patent describes a process for the preparation of polymers of vinyl aromatic monomers having a high degree of syndiotacticity comprising contacting one or more vinly aromatic monomers under polymerization conditions with a catalyst comprising the reaction product of polymethylaluminoxane and a zirconium (IV) complex corresponding to the formula: ZrXr/sub 3/, wherein X is halide or R, and R is independently each occurrence selected from the ligand group consisting of alkoxides and aryloxides corresponding to the formula: OR'; amides corresponding to the formula: NR'/sub 2/; phosphides corresponding to the formula: PR'/sub 2/; and ..beta..-diketonates corresponding to the formula: R'-C(O)-CH-C(O)-R', and R' is alkyl or aryl of up to 12 carbons.
- Assignee:
- Dow Chemical Co., Midland, MI
- Patent Number(s):
- US 4774301
- OSTI ID:
- 6884848
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALKYL RADICALS
ALUMINIUM COMPOUNDS
AMIDES
AROMATICS
ARYL RADICALS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
HALIDES
HALOGEN COMPOUNDS
KETONES
MONOMERS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PNICTIDES
POLYMERIZATION
POLYMERS
POLYVINYLS
RADICALS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
YIELDS
ZIRCONIUM COMPOUNDS