There is provided an active energy ray-curable composition having excellent storage stability. The active energy ray-curable composition includes: an active energy ray-curable compound (A) having an unsaturated ethylenic double bond; a thiol compound (B) having two or more mercapto groups in one molecule; a reaction inhibitor (C) configured to inhibit a reaction between the unsaturated ethylenic double bond and the mercapto groups; a radical polymerization inhibitor (D) ; and water (E), in which the content of the water (E) is 0.05 ppm by mass or more and less than 1% by mass. The content of the reaction inhibitor (C) is 0.005 parts by mass or more and 10 parts by mass or less when the total content of the active energy ray-curable compound (A) and the thiol compound (B) is 100 parts by mass. The content of the radical polymerization inhibitor (D) is 0.005 parts by mass or more and 5 parts by mass or less when the total content of the active energy ray-curable compound (A) and the thiol compound (B) is 100 parts by mass.
本发明提供了一种具有优异储存稳定性的活性能量射线固化组合物。该活性能量射线固化组合物包括:具有不饱和
乙烯双键的活性能量射线固化化合物 (A);在一个分子中具有两个或两个以上巯基的
硫醇化合物 (B);用于抑制不饱和
乙烯双键与巯基之间反应的反应
抑制剂 (C);自由基聚合
抑制剂 (D) ;以及
水 (E),其中
水 (E) 的含量为 0.05 ppm 或更多,小于 1%(质量分数)。当活性能量射线固化化合物(A)和
硫醇化合物(B)的总含量为 100 份时,反应
抑制剂 (C)的含量为 0.005 份(以质量为单位)或以上,10 份(以质量为单位)或以下。当活性能量射线固化化合物 (A) 和
硫醇化合物 (B) 的总含量为 100 份时,自由基聚合
抑制剂 (D) 的含量为 0.005 份或更多,5 份或更少。