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Title: Homogeneous catalysts for stereoregular olefin polymerization

The synthesis, and use as precatalysts of chiral organozirconium complexes for olefin polymerization are disclosed, having the structure (C{sub 5}R{prime}{sub 4{minus}x}R*{sub x})A(C{sub 5}R{double_prime}{sub 4{minus}y}R{double_prime}{prime}{sub y})MQ{sub p}, where x and y represent the number of unsubstituted locations on the cyclopentadienyl ring; R{prime}, R{double_prime}, R{double_prime}{prime}, and R* represent substituted and unsubstituted alkyl groups having 1--30 carbon atoms and R* is a chiral ligand; A is a fragment containing a Group 13, 14, 15, or 16 element of the Periodic Table; M is a Group 3, 4, or 5 metal of the Periodic Table; and Q is a hydrocarbyl radical, or halogen radical, with 3{>=}p{>=}0. Related complexes may be prepared by alkylation of the corresponding dichlorides. In the presence of methylalumoxane or triarylborane cocatalysts, these complexes form ``cation-like`` species which are highly active for olefin polymerization. In combination with a Lewis acid cocatalyst, propylene or other {alpha}-olefin polymerization can be effected with very high efficiency and isospecificity. 1 fig.
Inventors:
; ;
Issue Date:
OSTI Identifier:
106692
Assignee:
Northwestern Univ., Evanston, IL (United States) PTO; SCA: 020500; 400201; PA: EDB-95:133694; SN: 95001461627
Patent Number(s):
US 5,455,317/A/
Application Number:
PAN: 8-373,869
Contract Number:
FG02-86ER13511
Resource Relation:
Other Information: PBD: 3 Oct 1995
Research Org:
Northwestern University
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 40 CHEMISTRY; ORGANOMETALLIC COMPOUNDS; CHEMICAL COMPOSITION; CATALYTIC EFFECTS; CHEMICAL PREPARATION; ALKENES; POLYMERIZATION; MOLECULAR STRUCTURE

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