Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1984-07-13
1987-07-14
Cannon, James C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
156 53, 156 55, 174120C, 174120SR, 174121SR, 174122G, 427386, 4273898, 4274073, 428285, 428324, 4284228, 525528, 528 52, 528 73, H01B 304, H01B 308, H01B 340, H01B 1760
Patent
active
046802223
ABSTRACT:
Process for insulating by impregnation an electric winding with isocyanurate and oxazolidone cycles resins, in which one wraps around the conductors a glass cloth and porous mica paper tape loaded with a quaternary ammonium salt catalyzing the condensation of the isocyanate and epoxy compounds into isocyanurate and oxazolidone cycles, one impregnates the tape with a varnish containing an isocyanate compound and a liquid epoxy resin, then one subjects the impregnated tape to a varnish polymerization thermal treatment. One uses as a quaternary ammonium salt a benzyl-trialkylammonium halide with an alkyl chain containing at the most 3 carbon atoms.
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Chemical Abstracts, 85 (2), 6351s, (1976).
Chemical Abstracts, vol. 85, No. 2, Jul. 12, 1976, p. 24, Abstract No. 6351s, Catalysts for Polyoxazolidone Manufacture, N. Kawasawa et al.
Alsthom-Atlantique S.A.
Cannon James C.
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