Method for preparing alicyclic type epoxy (meth) acrylic acid esters

A new compound that has 3, 4-epoxytricyclo[5.2.1.0<SP>2, 6</SP>]decane frame and the polymerization unsaturated bonding and the process of manufacture thereof are provided. Moreover, it is characterized by the copolymer consisting of unit of (A) alkali solubility radical containing monomer and (B) monomer corresponding to epoxy radical containing polymerization unsaturated compound, alternatively, in addition to the above-mentioned monomer (A) and (B), the copolymer comprising the epoxy radical non-containing polymerization unsaturated compound corresponding to N-substituted maleimide and the like, wherein the ratio of above-mentioned monomer unit(B) is 40 to 90% by weight, based on the unit of total monomers, and in the above-mentioned monomer unit (B), 30% or above of which is a monomer corresponding to the specific 3, 4-epoxytricyclo[5.2.1.0<SP>2, 6</SP>]decane frame containing compound. By using the said copolymer, the preservation stability of the resin composition including the resin is extremely high while forming the excellent film to heatproof, and the synthesis of copolymer is also easy.