Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts
Abstract
A catalyst system useful to polymerize and co-polymerize polar and non-polar olefin monomers is formed by in situ reduction with a reducing agent of a catalyst precursor comprising {Cp*MRR'.sub.n }.sup.+ {A}.sup.- wherein Cp* is a cyclopentadienyl or substituted cyclopentadienyl moiety; M is an early transition metal; R is a C.sub.1 -C.sub.20 hydrocarbyl; R' are independently selected from hydride, C.sub.1 -C.sub.20 hydrocarbyl, SiR".sub.3, NR".sub.2, OR", SR", GeR".sub.3, and SnR".sub.3 containing groups (R"=C.sub.1 -C.sub.10 hydrocarbyl); n is an integer selected to balance the oxidation state of M; and A is a suitable non-coordinating anionic cocatalyst or precursor. This catalyst system may form stereoregular olefin polymers including syndiotactic polymers of styrene and methylmethacrylate and isotactic copolymers of polar and nonpolar olefin monomers such as methylmethacrylate and styrene.
- Inventors:
- Issue Date:
- Research Org.:
- Northwestern Univ., Evanston, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 879802
- Patent Number(s):
- 6544922
- Application Number:
- 10/198,241
- Assignee:
- Northwestern University (Evanston, IL)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- DOE Contract Number:
- FG02-86ER13511
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2002 Jul 18
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Marks, Tobin J., Luo, Lubin, and Yoon, Sung Cheol. Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts. United States: N. p., 2003.
Web.
Marks, Tobin J., Luo, Lubin, & Yoon, Sung Cheol. Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts. United States.
Marks, Tobin J., Luo, Lubin, and Yoon, Sung Cheol. Tue .
"Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts". United States. https://www.osti.gov/servlets/purl/879802.
@article{osti_879802,
title = {Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts},
author = {Marks, Tobin J. and Luo, Lubin and Yoon, Sung Cheol},
abstractNote = {A catalyst system useful to polymerize and co-polymerize polar and non-polar olefin monomers is formed by in situ reduction with a reducing agent of a catalyst precursor comprising {Cp*MRR'.sub.n }.sup.+ {A}.sup.- wherein Cp* is a cyclopentadienyl or substituted cyclopentadienyl moiety; M is an early transition metal; R is a C.sub.1 -C.sub.20 hydrocarbyl; R' are independently selected from hydride, C.sub.1 -C.sub.20 hydrocarbyl, SiR".sub.3, NR".sub.2, OR", SR", GeR".sub.3, and SnR".sub.3 containing groups (R"=C.sub.1 -C.sub.10 hydrocarbyl); n is an integer selected to balance the oxidation state of M; and A is a suitable non-coordinating anionic cocatalyst or precursor. This catalyst system may form stereoregular olefin polymers including syndiotactic polymers of styrene and methylmethacrylate and isotactic copolymers of polar and nonpolar olefin monomers such as methylmethacrylate and styrene.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 08 00:00:00 EDT 2003},
month = {Tue Apr 08 00:00:00 EDT 2003}
}