Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-10-31
1982-11-02
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
204290R, 204294, 264 49, 264105, 264127, 427115, 427245, 427353, 429 42, C25B 1103, C25B 1112, B29D 2700, C25B 1308
Patent
active
043572626
ABSTRACT:
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.
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Kroon, D. F. et al., Elsevier Sequoia Patent Reports, vol. 5, Fuel Cell Electrodes: Part 1, pp. 62, 132, 1974.
Diamond Shamrock Corporation
Hazzard John P.
Konopka P. E.
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