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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[prime][double prime][sub y])-M-Q[sub p], where x and y represent the number of unsubstituted locations on the cyclopentadienyl ring; R[prime], R[double prime], R[prime][double 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:
6993580
Patent Number(s):
5330948 A
Application Number:
PPN: US 7-860784
Assignee:
Northwestern Univ., Evanston, IL (United States) PTO; EDB-94-128287
DOE Contract Number:  
FG02-86ER13511
Resource Type:
Patent
Resource Relation:
Patent File Date: 31 Mar 1992
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; ALKENES; POLYMERIZATION; CATALYSTS; CHEMICAL PREPARATION; CHLORIDES; MOLECULAR STRUCTURE; ORGANOMETALLIC COMPOUNDS; ZIRCONIUM COMPLEXES; CHEMICAL REACTIONS; CHLORINE COMPOUNDS; COMPLEXES; HALIDES; HALOGEN COMPOUNDS; HYDROCARBONS; ORGANIC COMPOUNDS; SYNTHESIS; TRANSITION ELEMENT COMPLEXES; 020500* - Petroleum- Products & By-Products

Citation Formats

Marks, T.J., Eisen, M.S., and Giardello, M.A. Homogeneous catalysts for stereoregular olefin polymerization. United States: N. p., 1994. 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_6993580,
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[prime][double prime][sub y])-M-Q[sub p], where x and y represent the number of unsubstituted locations on the cyclopentadienyl ring; R[prime], R[double prime], R[prime][double 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 = {1994},
month = {7}
}