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Title: Homogeneous catalysts for stereoregular olefin polymerization

Abstract

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:
Research Org.:
Northwestern Univ., Evanston, IL (United States)
OSTI Identifier:
106692
Patent Number(s):
5,455,317
Application Number:
PAN: 8-373,869
Assignee:
Northwestern Univ., Evanston, IL (United States)
DOE Contract Number:  
FG02-86ER13511
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 3 Oct 1995
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 40 CHEMISTRY; ORGANOMETALLIC COMPOUNDS; CHEMICAL COMPOSITION; CATALYTIC EFFECTS; CHEMICAL PREPARATION; ALKENES; POLYMERIZATION; MOLECULAR STRUCTURE

Citation Formats

Marks, T J, Eisen, M S, and Giardello, M A. Homogeneous catalysts for stereoregular olefin polymerization. United States: N. p., 1995. Web.
Marks, T J, Eisen, M S, & Giardello, M A. Homogeneous catalysts for stereoregular olefin polymerization. United States.
Marks, T J, Eisen, M S, and Giardello, M A. Tue . "Homogeneous catalysts for stereoregular olefin polymerization". United States.
@article{osti_106692,
title = {Homogeneous catalysts for stereoregular olefin polymerization},
author = {Marks, T J and Eisen, M S and Giardello, M A},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {10}
}