POLYIMIDE RESIN VARNISH, INSULATED ELECTRIC WIRE USING SAME, ELECTRIC COIL, AND MOTOR

WIPO Patent Application WO/2012/153636

A1

Provided is a polyimide resin varnish capable of forming an insulating layer having high inter-layer adhesion, high adhesion to a conductor, and excellent processing resistance. Also provided is an insulated electric wire having excellent processing resistance, heat resistance, and mechanical properties. The polyimide resin varnish has as the main component thereof a polyimide precursor resin obtained by reacting an aromatic diamine and an aromatic tetracarboxylic dianhydride. The imide group concentration of the polyimide precursor resin after imidization is 28.0%-33.0%.

YOSHIDA KENGO (JP)
YAMAUCHI MASAAKI (JP)
SHIWA MASATAKA (JP)
HATANAKA YUJI (JP)
IMAI JUNICHI (JP)
SUGAWARA JUN (JP)
SHIMIZU TORU (JP)
SAITO HIDEAKI (JP)
FURUYA YUUDAI (JP)

PCT/JP2012/061047

November 15, 2012

April 25, 2012

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SUMITOMO ELECTRIC WINTEC INC (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
YOSHIDA KENGO (JP)
YAMAUCHI MASAAKI (JP)
SHIWA MASATAKA (JP)
HATANAKA YUJI (JP)
IMAI JUNICHI (JP)
SUGAWARA JUN (JP)
SHIMIZU TORU (JP)
SAITO HIDEAKI (JP)
FURUYA YUUDAI (JP)

C08L79/08; C09D5/25; C09D179/08; H01B3/30; H01B7/02; H01F5/00; H01F5/06; H02K1/04; H02K3/34

WO2007083526A1

2007-07-26

JP2001266647A	2001-09-28
JPS63221126A	1988-09-14
JP2003119380A	2003-04-23

NAKATA, Motomi et al. (JP)
Nakada Motoki (JP)

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