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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, SnR''.sub.3, and C.dbd.C-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:
; ;
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175935
Patent Number(s):
7,119,158
Application Number:
10/842,725
Assignee:
Northwestern University (Evanston, IL)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

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., 2006. 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. 2006. "Cyclopentadienyl-containing low-valent early transition metal olefin polymerization catalysts". United States. https://www.osti.gov/servlets/purl/1175935.
@article{osti_1175935,
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, SnR''.sub.3, and C.dbd.C-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 = {},
url = {https://www.osti.gov/biblio/1175935}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {10}
}

Works referenced in this record:

Metallocene/Borate-Catalyzed Copolymerization of 5- N , N -Diisopropylamino-1-pentene with 1-Hexene or 4-Methyl-1-pentene
journal, January 1999