Polyamide-imide resin insulating varnish and insulated wire using the same
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United States of America Patent
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Jun 5, 2012
Grant Date -
Dec 10, 2009
app pub date -
Jun 4, 2009
filing date -
Jun 4, 2008
priority date (Note) -
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Abstract
A polyamide-imide resin insulating varnish includes an aromatic diamine component, an aromatic diisocyanate component, an acid component including an aromatic tricarboxylic acid anhydride, and a solvent. The aromatic diamine component includes an aromatic diamine with three or more benzene rings and an aromatic diamine with two or less benzene rings. The aromatic diamine with three or more benzene rings and the aromatic diamine with two or less benzene rings are added 99/1 to 30/70 in mole ratio.
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