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US 4,650,551 AGranted
Supported ion exchange membrane films
AssigneeThe Dow Chemical Company
InventorsWilliam P. Carl, Jeffrey D. Birdwell
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Abstract
The invention is a method for forming a supported membrane film comprising: (a) at least partially coating a polytetrafluoroethylene fabric with a sizing composition; (b) contacting the coated polytetrafluoroethylene fabric with a membrane film having sites convertible to ion exchange groups; and (c) heating the polytetrafluoroethylene fabric and the membrane film while maintaining the fabric and the film in contact.
Claims34
A method for forming a supported membrane film comprising:
- (a) at least partially coating a polytetrafluoroethylene fabric with a sizing composition;
- (b) contacting the coated polytetrafluoroethylene fabric with a membrane film having sites convertible to ion exchange groups;
- and
- (c) heating the polytetrafluoroethylene fabric and the membrane film while maintaining the fabric and the film in contact.
1 more element
Dependencies are inferred from the claim text.