CORONA DISCHARGE-RESISTANT INSULATING VARNISH COMPOSITION AND INSULATED WIRE HAVING INSULATED LAYER FORMED THEREFROM
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United States of America Patent
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Issued Date -
Sep 20, 2012
app pub date -
Mar 7, 2012
filing date -
Mar 17, 2011
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Abandoned
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Abstract
Disclosed is an insulating varnish composition including an organo silica sol containing a silica covered with a dispersant in a solvent containing N-methyl-2-pyrrolidone (NMP) as a main component and a polyamidimide resin dispersed in a solvent containing NMP as a main component. An insulated layer formed from the insulating varnish composition containing inorganic insulating particles of silica uniformly dispersed therein may have excellent corona discharge resistance, thereby preventing the insulation breakdown.
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