PROBLEM TO BE SOLVED: To provide a curing composition which has less polymerization inhibition by oxygen, and thus can be suitably used for polymerization in dental operation under a condition that oxygen is hardly blocked, resulting in reducing the amount of an unpolymerized remainder on a surface and improving a surface hardness.SOLUTION: The curing composition comprises (a) 100 pts. by mass of a radical polymerizable monomer containing 0.1-10% by mass of a long chain (meth)acrylate base monomer represented by CH2C(R1)COOR2 (wherein R1 is hydrogen or methyl, and R2 is a long chain hydrocarbon group having a carbon number of 8-24), (b) 0.5-10 pts. by mass of water, (c) 0.1-10 pts. by mass of a surfactant, and (d) an effective amount of a radical polymerization initiator.COPYRIGHT: (C)2009,JPO&INPIT【課題】酸素による重合阻害が少ないため、酸素遮断下で重合させることの困難な歯科用として好適に使用できる、表面未重合量が低減され且つ表面硬度が向上した硬化性組成物を提供する。【解決手段】(a)CH2C(R1)COOR2(式中、R1は水素原子又はメチル基を示し、R2は鎖長が炭素数8~24の長さである長鎖炭化水素基を示す。)で示される長鎖(メタ)アクリレート系単量体0.1~10質量%を含有するラジカル重合性単量体100質量部;(b)水0.5~10質量部;(c)界面活性剤0.1~10質量部;及び(d)有効量のラジカル重合開始剤;を含有することを特徴とする硬化性組成物。【選択図】なし
