ACTIVE ENERGY RAY-CURING COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide an active energy ray-curing composition which is low in viscosity and shrinkage and is excellent in rapid curing performance. SOLUTION: The active energy ray-curing composition comprises 5-50% by mass of a crosslinked fine particle (A) and 95-50% by mass of a radical polymerizing compound (B) having a sodium element concentration of 0.8-100 ppm, wherein the crosslinked fine particle (A) is produced by radical polymerizing a compound (a1) having one radical polymerizable ethylenically unsaturated group in the molecule and another compound (a2) having two or more radical polymerizable ehtylenically unsaturated groups in the molecule at an (a1):(a2) ratio of 55:45-95:5 (by mass).