Process for producing electric windings

H - Electricity – 01 – F

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18/73

H01F 41/12 (2006.01) C08G 59/40 (2006.01) H01B 3/40 (2006.01)

Patent

CA 1120219

ABSTRACT OF THE DISCLOSURE Electric machine windings produced by wrapping a composite insulating material around an electrical conductor, said composite insulating material having been prepared by bonding two or more insulating materials with a silicone resin containing hydroxyl groups in the molecular structure, impregnating said composite insulating material with an insulating varnish comprising 1 equivalent of polyfunctional epoxy compound and 2.5 to 25 equivalents of a polyfunctional isocyanate compound and curing said varnish, have excellent insulation properties under high temperatures and high humidity and thermal resistance of class H or more.

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