Patent ID: 7972693

Claim:
An adhesive polyamideimide-based enamel varnish composition for enamel wire, the varnish composition having a polymeric resin component in organic solvent, the polymeric resin component comprising: a first polyamideimide resin, presented in Chemistry FIG. 1: where a ratio of m:n ranges from 0.1:0.9 to 0.9:0.1; and a second polyamideimide resin in which a triazine ring having an imidazole group in a side chain is introduced into a major chain, the second polyamideimide resin being 1 to 20% by weight of a total weight of resin in the composition, wherein: R 1 and R 2 each are independently selected from the group consisting of an alkyl group, an alkoxy group, and halogen, the alkyl group and the alkoxy group having 1 to 4 carbon atoms, a and b each being an integer of 0 to 4; R 3 and R 5 each are independently a residue derived from at least one acid compound selected from the group consisting of trimelitic acid, trimelitic di-anhydride, trimelityl chloride, and trimelitic acid derivatives; and R 4 is a residue derived from at least one aromatic diisocyanate compound selected from the group consisting of diphenylmethane-4,4′-diisocyanate, diphenylmethane-3,3′-diisocyanate, diphenylmethane-3,4′-diisocyanate, diphenylether-4,4′-diisocyanate, benzophenone-4,4′diisocyanate, diphenylsulfone-4,4′-diisocyanate, tolylene-2,4-diisocyanate, tolylene-2,6-diisocyanate, m-xylene diisocyanate, and p-xylenediisocyanate.