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Living olefin polymerization processes

Patent ·
OSTI ID:872230
 [1];  [2]
  1. Winchester, MA
  2. Cambridge, MA
+ Show Author Affiliations

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.

Research Organization:
Massachusetts Institute of Technology (Cambridge, MA)
DOE Contract Number:
FG02-86ER13564
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Number(s):
US 5889128
OSTI ID:
872230
Country of Publication:
United States
Language:
English

References (5)

Zirconium complexes incorporating the new tridentate diamide ligand [(Me 3 Si)N{CH 2 CH 2 N(SiMe 3 )} 2 ] 2– (L); the crystal structures of [Zr(BH 4 ) 2 L] and [ZrCl{CH(SiMe 3 ) 2 }L] journal January 1995
Conformationally Rigid Diamide Complexes:  Synthesis and Structure of Titanium(IV) Alkyl Derivatives journal January 1996
Synthesis of Titanium and Zirconium Complexes That Contain the Tridentate Diamido Ligand, [(( t -Bu- d 6 )N- o -C 6 H 4 ) 2 O] 2 - ([NON] 2 - ) and the Living Polymerization of 1-Hexene by Activated [NON]ZrMe 2 journal April 1997
Living Polymerization of α-Olefins by Chelating Diamide Complexes of Titanium journal January 1996
Cationic Alkylzirconium Complexes Based on a Tridentate Diamide Ligand:  New Alkene Polymerization Catalysts journal January 1996

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Related Subjects

/526/502/522/
15
16
absence
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double
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employ
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ligand
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metal
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olefin
olefin monomer
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particularly
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provide
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