Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1975-06-20
1977-05-17
Prescott, Arthur C.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
204181, 204299EC, C25D 1316, C25D 1306, C25D 1324
Patent
active
040240460
ABSTRACT:
A continuous method is provided for making polyimide coated conductors, such as wire and metal foil, by continuously passing the conductor into an aqueous plural solvent polyamide acid salt electrocoating bath. Electrodeposition can be effected of polyamide acid having sufficient organic solvent to produce a satisfactory polyimide film by passing the polyamide acid treated conductor through a curing tower. The electrocoating bath can be continuously maintained by use of a semi-permeable membrane allowing for continuous plural solvent and base removal, while makeup aqueous plural solvent polyamide acid salt mixture is continuously introduced into the bath. A polyimide coated aluminum foil useful for making transformer windings is also included.
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Lupinski John H.
McQuade James M.
Cohen Joseph T.
General Electric Company
Prescott Arthur C.
Squillaro Jerome C.
Teoli William A.
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