Corona-resistant wire enamel compositions and conductors...

Details Corona-resistant wire enamel compositions and conductors... Corona-resistant wire enamel compositions and conductors...

H - Electricity

01

B

117/142, 337/82

H01B 3/42 (2006.01) H01B 13/06 (2006.01)

Patent

CA 1208325

CORONA-RESISTANT WIRE ENAMEL COMPOSITIONS AND CONDUCTORS INSULATED THEREWITH ABSTRACT OF THE DISCLOSURE A corona-resistant wire enamel composition is described comprising a polyimide, polyamide, polyester, polyamideimide, polyesterimide, or polyetherimide resin and from about 1% to about 35% by weight of dispersed alumina particles of a finite size less than about 0.1 micron, the alumina particles being dispersed therein by high shear mixing. A method of providing corona resistant one and two-stage insulations for an electrical conductor employing the above compositions and an electrical conductor insulated with a one or two-stage coating of the wire enamel compositions are also disclosed.

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