Claims
- 1. A separator membrane for use in secondary alkali batteries, said membrane comprising a hydrocarbon-or non-fluorine halogen-containing polymer substrate having a non-ion selective hydrophilic group and ion exchange group, said membrane having an electrical resistance which, when said membrane is heated in 12N NaOH for 30 minutes at a temperature between about 20.degree. and 100.degree. C., varies from the initial value for 20.degree. C. by an amount between 10% and about 24%.
- 2. A separator membrane according to claim 1, wherein said substrate is selected from the group consisting of polyethylene, polypropylene, polybutadiene, polyethylene terephthalate, polyvinyl chloride, polyamide and polyester.
- 3. A separator membrane according to claim 1, wherein said non-ion selective hydrophilic group is provided by the grafting onto said substrate of a hydrophilic vinyl compound containing an hydroxyl group.
- 4. A separator membrane according to claim 3, wherein said monomer is selected from the group consisting of 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, alkyl alcohol, polyethylene glycol acrylate, polyethylene glycol methacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, and N-vinyl-pyrrolidone.
- 5. A separator membrane according to claim 1, wherein said non-ion selectric hydrophilic group is provided by grafting onto said substrate a monomer selected from the group consisting of vinyl acetate, allyl acetate and allyl formate, and converting said grafted monomer to non-ion selectric hydrophilic groups by hydrolysis after grafting.
Priority Claims (1)
Number |
Date |
Country |
Kind |
55-113201 |
Aug 1980 |
JPX |
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CROSS REFERENCE TO OTHER APPLICATION
This application is a continuation-in-part of our copending application Ser. No. 290,302 filed August 5, 1981 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4200538 |
Seita et al. |
Apr 1980 |
|
4302334 |
Jakabhazy et al. |
Nov 1981 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
290302 |
Aug 1981 |
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