PROBLEM TO BE SOLVED: To provide a novel curable composition having excellent adhesive properties, suitable curing properties and excellent storage stability for a long period, as a composition obtained by reacting a hydroperoxide compound and a thiourea derivative and polymerizing a radical-polymerizable monomer.SOLUTION: A curable composition (A) contains a radical-polymerizable monomer having no acidic group (a1), a hydroperoxide compound (a2) and a substituted pyridyl thiourea compound represented by the formula (I) (a3) (in the formula, each symbol is as defined in the specification).COPYRIGHT: (C)2015,JPO&INPIT【課題】ハイドロパーオキサイド化合物とチオ尿素誘導体を反応させてラジカル重合性単量体を重合させる組成物において、接着性に優れ、適切な硬化性を有し、かつ長期間の保存安定性に優れた新規な硬化性組成物を提供する。【解決手段】酸性基を有さないラジカル重合性単量体(a1)、ハイドロパーオキサイド化合物(a2)、及び式(I)で表される置換ピリジルチオ尿素化合物(a3)(式中の各記号は明細書に定義の通りである)を含有する硬化性組成物(A)とする。【選択図】なし
