PROBLEM TO BE SOLVED: To provide a new production method capable of efficiently producing a dried product of nanoparticles using three components of gallate catechin, animal protein, and an acid.SOLUTION: Nanoparticles are formed by: obtaining a solution containing gallate catechin and animal protein by mixing three components of gallate catechin, animal protein, and an acid with water, a water-containing organic solvent, or an organic solvent so as to contain, as solid, the gallate catechin in an amount of 5-20 wt.%, the animal protein comprising whey proteins or their decomposed product in the total amount of 5-20 wt.%, and the acid in an amount of 5-20 wt.% and diluting the obtained solution containing the gallate catechin and the animal protein with water, a water-containing organic solvent, or an organic solvent and drying the diluted solution. The average particle diameter of the nanoparticles is preferably 10-200nm.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】ガレート型カテキン、動物性タンパク質および酸の3成分を用いたナノ粒子の乾燥物を効率よく製造することができる新たな製造方法を提供すること。【解決手段】ガレート型カテキンを固形分として5~20重量%、乳清タンパク質またはその分解物からなる動物性タンパク質を固形分として合計5~20重量%、酸を固形分として5~20重量%となるように水、含水有機溶媒または有機溶媒に前記3成分を混合して、ガレート型カテキン、動物性タンパク質含有液を得、得られたガレート型カテキン、動物性タンパク質含有液を水、含水有機溶媒または有機溶媒で希釈し、この希釈液を乾燥して、ナノ粒子を形成させる。ナノ粒子の平均粒子径は10~200nmが好ましい。【選択図】なし
