Copolymer of ethylene oxide and at least one substituted...

Details Copolymer of ethylene oxide and at least one substituted... Copolymer of ethylene oxide and at least one substituted...

2005-02-15

2005-02-15

Cheung, William K. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C528S393000, C528S421000, C429S317000

Reexamination Certificate

active

06855788

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—CH2—CHR— units in which R is a substituent containing a reactive function which is cross-linkable by free radical process, and possibly —O—CH2—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=Mw/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.

REFERENCES:
patent: 5086351 (1992-02-01), Couput et al.
patent: 20040038132 (2004-02-01), Harvey et al.

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