COMPOSITION FOR HEAT STORAGE MATERIAL, HEAT STORAGE MATERIAL, AND ARTICLE

To provide a composition for a heat storage material which maintains a shape even at a temperature equal to or higher than a phase transition temperature and is excellent in tensile strength, and to provide a heat storage material.SOLUTION: The composition for a heat storage material contains a monomer (a1) represented by general formula (1) and a polyfunctional (meth)acrylate (a2) as polymerizable monomers. The ratio of the monomer (a1) is 60-99 wt.% and the ratio of the polyfunctional (meth)acrylate (a2) is 1-40 wt.% based on the total weight of the polymerizable monomers. The polyfunctional (meth)acrylate (a2) is a (meth)acrylate having three or more (meth)acryloyl groups in one molecule.SELECTED DRAWING: None 【課題】相転移温度以上でも形状を維持し、かつ、引張強度に優れる蓄熱材用の組成物及び蓄熱材を提供する。【解決手段】一般式（１）で表される単量体（ａ１）と、多官能（メタ）アクリレート（ａ２）とを重合性単量体として含有し、前記重合性単量体の全重量に基づく、前記単量体（ａ１）の割合が６０～９９重量％で、前記多官能（メタ）アクリレート（ａ２）の割合が１～４０重量％であり、前記多官能（メタ）アクリレート（ａ２）が１分子中に３個以上の（メタ）アクリロイル基を有する（メタ）アクリレートである蓄熱材用の組成物。【選択図】なし