INSULATION COATING COMPOSITION FOR ELECTRICAL STEEL

摘要

The invention provides a coating composition to coat electrical steel sheets, the composition comprising: A) 5 to 45 weight % of at least one binder resin, B) 0.1 to 40, preferably 1 to 30 weight % of nano scaled particles, the particles having an average radius ranging from 1 to 300 nm, C) at least one cross-linking agent in an amount able to cross-link with the binder resin, preferably 0.1 to 30 weight % of at least one cross-linking agent, D) 0.1 to 60 weight % of at least one additive and/or pigment and/or filler, and E) 5 to 70 weight % of water and/or at least one solvent, the weight % based on the total weight of the composition. The composition according to the invention makes it possible to provide a high property profile standard combining the different technical requirements such as high ability for welding, clamping, interlocking, punching, riveting, high pressure, thermal resistance of electrical steel sheets coated with the composition according to the invention and of cores produced from these coated electrical steel sheets.