| abstract |
A wire coating medium contains polyester resins, polyester imide resins or hydroxyl group-containing polyesters together with an isocyanate component whose free isocyanate groups are completely blocked. This wire coating medium is produced by esterification of polyhydric alcohols with naphthalene dicarboxylic acid(s) and/or their esterifiable derivatives, mixed if required with other dicarboxylic acids and/or dicarboxylic acid derivatives, with the admixture of catalysts, organic solvents and additives, and if required by using imide group-containing or imide group-forming starting materials. |