Copolymer of ethylene oxide and at least one substituted oxirane carrying a cross-linkable function, process for preparation thereof, and use thereof for producing ionically conductive materials
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United States of America Patent
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Feb 15, 2005
Issued Date -
N/A
app pub date -
Dec 2, 2002
filing date -
Dec 9, 1993
priority date (Note) -
Expired
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Abstract
The invention concerns a copolymer of ethylene oxide and at least one substituted oxirane carrying a cross-linkable function. The copolymer comprises ethylene oxide, --O--CH.sub.2 --CHR-- units in which R is a substituent containing a reactive function which is cross-linkable by free radical process, and possibly --O--CH.sub.2 --CHR'-- units in which R' is a substituent containing no reactive function which is cross-linkable by means of a free radical process, It is characterized by an excellent polydispersity index I=M.sub.w /Mn and a random distribution of the different monomer units. The copolymer is prepared by an anionic copolymerization process. The copolymer is useful for preparing a solid electrolyte having good mechanical properties, a good cationic conductivity and a good chemical compatibility with the electrodes of a generator operating with alkali metals such as lithium and sodium.
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