The resin composition and its application

A resin composition comprising an epoxy resin, a hardener and a first filler, said first filler comprises calcium carbonate and hydrous magnesium silicate, wherein the first filler particle size of about 0.1 microns to about 100 m, the content of the first filler per 100 parts by weight of the epoxy resin, the first filler is from about 1 parts by weight to about 150 parts by weight.