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Title: 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:
 [1];  [2];  [1]
  1. (Evanston, IL)
  2. (Baton Rouge, LA)
Issue Date:
Research Org.:
Northwestern University
OSTI Identifier:
879802
Patent Number(s):
6,544,922
Application Number:
10/198241
Assignee:
Northwestern University (Evanston, IL) CHO
DOE Contract Number:  
FG02-86ER13511
Resource Type:
Patent
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 = {2003},
month = {4}
}

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