PROBLEM TO BE SOLVED: To provide a hair dyeing composition which can be used for dyeing hair in a predetermined color, which can keep the hair in a state of providing voluminous feeling and firmness/stiffness for a long time, and which has slight irritation to scalp.SOLUTION: A hair dyeing composition 100 has an emulsion structure including granular first phases 11 and a second phase 12 where the first phases 11 are dispersed. The hair dyeing composition 100 contains: an inorganic particle dispersion 1 constituting one of the first phases 11 and the second phase 12, which comprises hydrophobic inorganic particles 2 whose average particle diameter in primary particles is 1 nm to 15 μm, and an oil-soluble dispersant 5 where the hydrophobic inorganic particles 2 are dispersed an aqueous solvent 10 constituting the other one of the first phases 11 and the second phase 12 a surfactant 9 and hair dye components included in the first phases 11, the second phase 12, or both the first phases 11 and the second phase 12. The content ratio of the hydrophobic inorganic particles 2 is 0.03 to 11 mass% of the total mass, and the content ratio of the oil-soluble dispersant 5 is 2 to 60 mass% of the total mass.COPYRIGHT: (C)2016,JPO&INPIT【課題】毛髪を所定の色に染めるための染毛用途として用いることができ、ボリューム感及びハリ・コシのある状態の毛髪を長く保持でき、頭皮に対する刺激が少ない染毛用組成物を提供する。【解決手段】粒状の第1相11と、第1相11が分散している第2相12とからなるエマルジョン構造を有し、第1相11または第2相12の一方を構成し、一次粒子における平均粒子径が1nm~15μmの疎水性無機粒子2と、疎水性無機粒子2が分散している油溶性分散剤5とからなる無機粒子分散体1と、第1相11または第2相12の他方を構成する水性溶剤10と、界面活性剤9と、第1相11、第2相12、または、第1相11及び第2相12の両方に含まれる染毛用成分と、を含有し、疎水性無機粒子2の含有割合が、全質量の0.03~11質量%であり、油溶性分散剤5の含有割合が、全質量の2~60質量%である染毛用組成物100。【選択図】図1
