Patent ID: 7811668
Filing Date: 2010-10-12
Classification: B82Y,C01P,C08K,C09C,Y10T

Abstract:
1. A cured epoxy resin comprising a deagglomerated barium sulphate dispersed within said cured epoxy resin, said deagglomerated barium sulfate comprising primary and secondary barium sulfate particles, a crystallization inhibitor, and a dispersant; wherein the primary particles have an average primary particle size of <0.5 μm, wherein the dispersant sterically prevents reagglomeration of the primary and secondary barium sulphate particles and comprises groups which are able to interact with the surface of the primary and secondary barium sulphate particles, the dispersant being substituted by polar groups which endow the primary and secondary barium sulphate particles with a hydrophilicized surface, which permit the coupling of the primary and secondary barium sulphate particles to or into the epoxide and, accompanying the coupling, a further deagglomeration.