发明名称 |
Four layer cation exchange fluoropolymer membrane |
摘要 |
A cation exchange fluoropolymer membrane comprising at least three integrally laminated layers including a main layer made of a perfluorocarbon polymer having carboxylic acid groups as its ion exchange groups with an ion exchange capacity of from 1.4 to 2.0 meq/g dry resin and having a thickness of from 50 to 250 mu m, a sulfonic acid film surface layer formed on one side of said main layer, made of a perfluorocarbon polymer having sulfonic acid groups as its ion exchange groups with an ion exchange capacity of from 0.5 to 1.5 meq/g dry resin and having a thickness of from 5 to 50 m, and a carboxylic acid film surface layer formed on the other side of said main layer, made of a perfluorcarbon polymer having carboxylic acid groups as its ion exchange groups with an ion exchange capacity of from 0.5 to 1.3 meq/g dry resin and having a thickness of from 5 to 50 mu m, said sulfonic acid film surface layer and carboxylic acid film surface layer constituting the outer-most layers, respectively.
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申请公布号 |
US4983264(A) |
申请公布日期 |
1991.01.08 |
申请号 |
US19880173041 |
申请日期 |
1988.03.28 |
申请人 |
ASAHI GLASS COMPANY LTD. |
发明人 |
MIYAKE, HARUHISA;ITO, HIROAKI;SUZUKI, KOJI;YAMADA, RYOJI |
分类号 |
C25B13/08;C08J5/22;C25B1/46 |
主分类号 |
C25B13/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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