Patent ID: 8663803

Claim:
A varnish composition comprising: composition (A): an epoxy resin including: composition (A-1): a phosphorus containing epoxy resin, a phosphorus and silicon containing epoxy resin, or a mixture thereof; composition (A-2): dicyclopentadiene epoxy resin; and composition (A-3): oxazolidone epoxy resin; composition (B): a hardener, wherein the hardener of composition (B) is a polymer of styrene and maleic acid anhydride, a benzoxazine resin, or a mixture thereof; composition (C): an accelerant; composition (D): phosphorus-containing flame retardant; and composition (E): fillers, wherein the dicyclopentadiene epoxy resin of composition (A-2) is shown as formula 4: wherein “i” represents a number of repeat units.