PROBLEM TO BE SOLVED: To provide compositions which is excellent in adhesiveness to the nail immediately after coating and is excellent in adhesion to the nail even in long-term use, without damage to the surface when sending everyday life, with low stimulation to the nail and skin, without needing for sanding down the surface of the users own nail, and with high adhesiveness to the nail, the compositions preventing discoloration.SOLUTION: A photocurable artificial nail composition contains urethane (meth) acrylate oligomer, a radical polymerizable compound, and a photopolymerization initiator, at least one of the radical polymerizable compounds having the value of logS of -3.0 to 3.0 and having a PSA value of 75 to 150.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】塗布直後の自爪への接着性及び長期使用時の自爪への接着性に優れ、日常生活を送る際に表面が損傷することもなく、自爪や皮膚への刺激性が低く、かつ、使用者自身の爪表面に対してサンディングを行う必要がなく、かつ爪への密着性が高く、その変色を防止すること。【解決手段】ウレタン(メタ)アクリレートオリゴマー、ラジカル重合性化合物、及び光重合開始剤を含有し、該ラジカル重合性化合物のうちの少なくとも1種は、そのlogSの値が-3.0~3.0であり、かつPSAの値が75~150である光硬化性人工爪組成物。【選択図】なし
