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Title: Living olefin polymerization processes

Abstract

Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.

Inventors:
;
Publication Date:
Research Org.:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175990
Patent Number(s):
7,135,544
Application Number:
11/004,038
Assignee:
Massachusetts Institute of Technology (Cambridge, MA) OSTI
DOE Contract Number:
FG02-86ER13564
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Schrock, Richard R., and Bauman, Robert. Living olefin polymerization processes. United States: N. p., 2006. Web.
Schrock, Richard R., & Bauman, Robert. Living olefin polymerization processes. United States.
Schrock, Richard R., and Bauman, Robert. Tue . "Living olefin polymerization processes". United States. doi:. https://www.osti.gov/servlets/purl/1175990.
@article{osti_1175990,
title = {Living olefin polymerization processes},
author = {Schrock, Richard R. and Bauman, Robert},
abstractNote = {Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 14 00:00:00 EST 2006},
month = {Tue Nov 14 00:00:00 EST 2006}
}

Patent:

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  • Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis,more » a relatively small amount of homopolymer is formed.« less
  • Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis,more » a relatively small amount of homopolymer is formed.« less
  • Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis,more » a relatively small amount of homopolymer is formed.« less
  • A process is described for catalytically polymerizing one or more olefin monomers in a low pressure gas phase fluidized bed process which comprises polymerizing the monomers in such process with a catalyst composition consisting of: (a) a supported catalyst precursor formed by mixing together in a high speed bladed finishing device (i) about 50 to 95 weight % of solid inert particulate organic support material having an average particle size of 0.05 to 0.35 mm, a melting point of about 70/sup 0/ to 170/sup 0/C, and a density of about 0.9 to 1.5 grams/cc, and (ii) about 5 to 50more » weight % of solid particulate transition metal based low pressure olefin polymerization catalyst precursor, the particulate catalyst precursor being embedded in the particulate organic support material by the mixing, and (b) activating quantities of organometallic reducing agent compound.« less
  • This patent describes a process for the catalytic polymerization of an olefin by contact with a catalyst composition comprising an organoaluminum compound, a selectivity control agent and a solid titanium-containing catalyst component in which the atomic ratio of aluminum to titanium is from 1:1 to 150:1. The solid component is obtained by: (a) halogenating a magnesium compound of the formula MgR'R'' where R' is an alkoxide or aryloxide group and R'' is an alkoxide or aryloxide group or halogen, with a tetravalent titanium halide in the presence of a halohydrocarbon and an electron donor, therein forming a halogenated product; (b)more » contacting the halogenated product with an acid halide; (c) contacting the resulting acid halide-treated product with a tetravalent titanium halide at a temperature of about 40/sup 0/ to about 140/sup 0/C; and (d) washing the resulting titanium halide-treated product with an inert hydrocarbon liquid.« less