PURPOSE: The titled composition capable of easily and efficiently providing a flexible cured sheet, prepared by dispersing boron nitride powder at a specified ratio.
CONSTITUTION: A radiation-curable resin composition is obtained by adding 5W 80wt% boron nitride powder of an average particle diameter ≤50μm and, if necessary, a sensitizer (e.g., benzoin), a polymerization accelerator, etc., to a mixture containing 5W70wt% prepolymer having ethylenically unsaturated groups on at least both ends (e.g., urethane-acrylate prepolymer) and 35W90wt% ethylenically unsaturated monomer (e.g., ethylhexyl acrylate), and kneading the resulting mixture. This composition is applied to the surface of a support such as a glass plate or a film, and cured by exposing one or both of the surfaces of the film to a radiation to obtain a flexible sheet of a thickness of 10W100μm.
TAMURA SHINICHIROU
TAMURA SUSUMU
