Scully, Scott, Murphy & Presser, P.C.
Insulated wire and insulating varnish used therefor
An insulated wire including a conductor, and an insulating film formed by coating and baking an insulating varnish on the conductor directly or via another insulation layer. The insulating varnish includes a phenolic hydroxyl group-containing polyimide resin represented by a chemical formula (1):where X is a tetravalent aromatic group composing an aromatic tetracarboxylic dianhydride residue, Y1 is a divalent aromatic group including one or more phenolic hydroxyl groups and Y2 is a divalent aromatic group not including a phenolic hydroxyl group A ratio of the number Z1 of phenolic hydroxyl groups included in Y1 of the chemical formula (1) to the number Z2 of an imide group included in the chemical formula (1) is 0.15≦Z1/Z2≦0.85.
Hitachi Cable, Ltd. Hitachi Magnet Wire Corp.
Y C C C H C Y C Y C
Y10T C08G C08G C08G H01B C09D Y10T C08G Y10T C08G
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Hideyuki Yuki Tomiya
Kikuchi Honda Abe