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US 4,357,262 AGranted
Electrode layer treating process
AssigneeDiamond Shamrock Corporation
InventorFrank Solomon
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AssigneeDiamond Shamrock Corporation
InventorFrank Solomon
Estimating the term…
The present disclosure is directed to a process for treating gas electrodes containing a wetproofing (backing) layer which contains a polytetrafluoroethylene (PTFE) in conjunction with a water-soluble pore-forming agent and a PTFE-containing active layer to preserve and enhance their structural integrity which comprises contacting the electrode first with an alkylene polyol, or other water-soluble organic material having a plurality of hydroxyl groups, at temperatures ranging from about 50.degree. to about 100.degree. C. for a sufficient period of time to thoroughly wet the PTFE-containing active layer thereof, and thereafter contacting the thus-treated electrode with water in one or more washing steps to substantially remove the pore-forming agent. Between the hot soak with the alkylene polyol, or equivalent material, and the water wash(es), the electrode can optionally be dried.
A process for treating a structure containing one or more layer(s) containing polytetrafluoroethylene in conjunction with a water-soluble pore-forming agent(s) comprising contacting said structure with an alkylene polyol which (1) has a high initial boiling point of about 90.degree. C. or higher (2) the capability of wetting polytetrafluoroethylene, (3) the ability to be soluble or miscible in water and (4) is non-poisoning to any catalyst contained therein;
Dependencies are inferred from the claim text.