Coating processes – Electrical product produced – Carbon coating
Patent
1995-05-31
1997-05-06
Gorgos, Kathryn
Coating processes
Electrical product produced
Carbon coating
4271261, 427180, 427201, 427245, 427295, 427352, 4273722, 427304, B05D 512
Patent
active
056269056
ABSTRACT:
Process for the preparation of an asbestos-free microporous electroconductive substrate. The process includes (a) providing an aqueous suspension of a mixture of carbon or graphite fibers, polytetrafluoroethylene fibers, inert mineral fibers, at least one fluorinated polymer, a silica porogen, and, optionally, at least one thickening agent; (b) depositing a coating onto a porous support by programmedly vacuum filtering said suspension therethrough, the coating comprising a liquid medium; (c) removing the liquid medium from said coating and then drying same; (d) sintering the coating thus formed; and (e) extracting the silica porogen therefrom. A substrate including intimate admixture of carbon or graphite fibers, polytetrafluoroethylene fibers and inert mineral fibers, and optionally, at least one thickening agent, consolidated by a binding amount of at least one fluorinated polymer is formed. The substrate produced is well suited for the electrolysis of solutions of, e.g., alkali metal halides.
REFERENCES:
patent: 4743349 (1988-05-01), Bachot et al.
patent: 4775551 (1988-10-01), Bachot et al.
patent: 4940524 (1990-07-01), Perineau et al.
Bachot Jean
Kuntzburger Frederic
Gorgos Kathryn
Rhone-Poulenc Chimie
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