| abstract |
A film of a crosslinked high molecular substance is obtained by irradiating radioactive rays or an electron beam to a solution introduced into a mold. The solution contains an oligomer prepared from a hydroxy monomer selected from the group consisting of hydroxy lower alkyl acrylate, hydroxy lower alkyl methacrylate, hydroxy lower alkyoxy lower alkyl acrylate and hydroxy lower alkoxy lower alkyl methacrylate, and a styrene-based oligomer selected from the group consisting of homooligomer of styrenes and cooligomer of styrenes with unsaturated dicarboxylic acids. |