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...

2005-06-07

2005-06-07

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, C429S317000, C429S188000

Reexamination Certificate

active

06903174

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, R may be different from one unit to the other, 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, R′ may be different from one unit to the other. It is characterized by an excellent polymolecularity index I=Mw/Mn and a statistical 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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Charles C. Price, et al., Polymerization and Copolymerizationof Some Epoxides by Potassium tert-Butoxide in DMSO, Journal of Polymer Science: Part A-1, vol. 7, 1969, pp. 569-574.
Donald M. Simons, The Polymerization of Propylen Oxide, Journal of Polymer Science, vol. 44, 1960, pp. 303-311.

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