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:
- Publication Date:
- Research Org.:
- Northwestern Univ., Evanston, IL (United States)
- OSTI Identifier:
- 106692
- Patent Number(s):
- US 5,455,317/A/
- 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. 1995.
"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 = {},
url = {https://www.osti.gov/biblio/106692},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 03 00:00:00 EDT 1995},
month = {Tue Oct 03 00:00:00 EDT 1995}
}