Polybutadiene VPI resin

Details Polybutadiene VPI resin Polybutadiene VPI resin

1984-06-08

1985-11-19

Ziegler, Jacob

Electrical generator or motor structure

Dynamoelectric

Rotary

427295, 428375, 428378, 428379, 428383, 524449, 525263, 525281, 525290, H02K 1512

Patent

active

045544700

ABSTRACT:
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.degree. to about 180.degree. C. for about 2 to about 16 hours.

REFERENCES:
patent: 3636141 (1972-01-01), O'Neill et al.
patent: 3986253 (1976-10-01), Harris
patent: 4362848 (1982-12-01), Friedi et al.
patent: 4453988 (1984-06-01), Slater et al.

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