Patent ID: 7812063

Claim:
A flame-retardant resin formulation comprising from 5 to 20% by weight of a flame retardant component, from 30 to 40% by weight of an alkali-soluble component, from 5 to 10% by weight of a polymerizable monomer, from 4 to 5% by weight of a photoinitiator, and from 5 to 10% by weight of epoxy component, wherein the flame-retardant component is a phosphinic salt of the formula (I) wherein the phosphinic salt of the formula (I) is the aluminum salt of diethylphosphinic acid, wherein the median particle size (d 50 ) of the aluminum salt of diethylphosphinic acid is from 0.1 to 100 μm, wherein the alkali-soluble component is a modified epoxy acrylate, wherein the polymerizable monomer is a polyfunctional acrylate of polyhydric alcohols, wherein the polyhydric alcohols are pentaerythritol, dipentaerythritol or a mixture thereof, wherein the photoinitiator is an alpha-aminoacetophenone and wherein the epoxy compound is an epoxidized novolak.