H - Electricity – 02 – K
Patent
H - Electricity
02
K
31/154, 18/73
H02K 15/12 (2006.01) C08F 279/02 (2006.01) H01B 3/44 (2006.01) H02K 3/30 (2006.01)
Patent
CA 1252622
18 ABSTRACT OF THE DISCLOSURE Disclosed is a coil of insulated wire impregnated with a solventless vacuum pressure impregnated resin. The resin contains polybutadiene, at least 15% of which is 1,2-polybutadiene, about 10 about 150 phr dicyclopentadiene acrylate, about 0.005 to about 0.75 phr of a free radial polymerization inhibitor, about 0.05 to about 2.5 phr of a free radial polymerization initiator, and up to about 2.0 phr of a coupling agent. An optional component is about 1 to about 80 phr of an aromatic monomer having 1 to 2 vinyl groups. Also disclosed is a method of making a vacuum pressure impregnated coil by placing a coil of insulated wire in a partial vacuum, impregnating the coil with the resin, applying pressure to the resin to force it into the interstices of the coil, and curing the resin by heating it at about 100 to about 180°C for about 2 to about 16 hours.
482800
Chance James F.
Jerson Donald D.
Oldham And Company
Westinghouse Electric Corporation
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