Patent ID: 8642179
Filing Date: 2014-02-04
Classification: C08G,C09D,H01B,Y10T

Abstract:
1. An insulating varnish, comprising: a polyamide-imide resin consisting of a repeat unit represented by Formula (1) below derived from a synthesis reaction between a resin component (X) and a diisocyanate component (Y), wherein the resin component (X) is derived from a synthesis reaction between a diamine component comprising at least one aromatic diamine comprising a divalent aromatic group (R) comprising three or more aromatic rings, and an acid component in the presence of an azeotrope solvent, and the diisocyanate component (Y) consists of a 2,4′-diphenylmethane diisocyanate (Y in Formula (1), R denotes the divalent aromatic group comprising three or more aromatic rings, and m and n denote an integer of from 1 to 99, wherein the molar content of the 2,4′-diphenylmethane diisocyanate (Y