Patent ID: 9196412
Filing Date: 2015-11-24
Classification: C08G,C08K,H01B,H01F

Abstract:
1. A curable epoxy resin formulation composition useful as insulation for electrical apparatus comprising (a) at least one liquid epoxy resin; (b) at least one liquid cyclic anhydride hardener; (c) at least one thermally conducting and electrically insulating solid filler, wherein the filler is an epoxy-silane treated filler and wherein the filler has a size between about 1 micron and about 100 microns; and (d) at least one amine cure catalyst having no amine hydrogens; wherein the epoxy resin formulation composition upon curing provides a cured product with a balance of properties comprising a glass transition temperature of at least about 140° C., a tensile strength of at least about 80 MPa, a dielectric strength of at least about 10 kV/mm, a thermal conductivity of at least about 0.8 W/m-K, and a volume resistivity of at least about 1×10 12 ohm-cm.