| 摘要 |
PROBLEM TO BE SOLVED: To extremely reduce shrinkage during hardening which causes curling, and therefore, to obtain a compsn. having excellent adhesion property and good transparency, wear resistance and solvent resistance by incorporating an energy ray polymerizable material and a specified organic solvent dispersion type colloidal silica as the essential components. SOLUTION: The composition contains as the essential components, 100 pts.wt. of energy ray polymerizable material, and an organic solvent dispersion type colloidal silica having 5 to 200 nm average particle size by 1 to 500 pts.wt. calculated as SiO2 to the energy ray polymerizable material. In this method, the energy ray polymerizable material preferably consists of a cationic polymerizable organic substance and an energy ray sensitive cationic polymerization initiator, or a cationic polymerizable organic substance and an energy ray sensitive cationic polymerizable initiator, and radical polymerizable organic substance, and energy ray sensitive radical polymerization initiator. The weight ratio of the cationic polymerizable organic substance to the radical polymerizable organic substance is (1 to 100):(0 to 99). |
