COMPOSITE PARTICLE FOR FORMING WATER REPELLENT OIL REPELLENT COATED FILM, MANUFACTURING METHOD THEREFOR, AND FORMATION METHOD OF WATER REPELLENT OIL REPELLENT COATED FILM USING THE COMPOSITE PARTICLE

To provide a composite particle having oil repellency to salad oil, silicone oil or the like low in surface tension while holding water repellency to water high in surface tension, and a formation method of a coated film.SOLUTION: There is provided a composite particle for forming water repellent oil repellent coated film constituted by aggregating a plurality of resin coated particles in which a coated layer containing a fluoroalkylacrylate resin or a fluoroacrylate resin is formed on a surface of an inorganic particle having average primary particle diameter of 5 to 100 nm and having fluorine content of 1.5 to 7.5 wt.% and average particle diameter based on volume (D) of 1 to 100 μm. There is provided a method for forming a water repellent oil repellent coated film by dispersing the composite particle in a solvent with a ratio of 10 to 20 mass% of the composite particle based on 100 mass% of the solvent to prepare a dispersion, and coating a substrate surface with the dispersion.SELECTED DRAWING: Figure 1 【課題】表面張力の高い水に対する撥水性を保持しつつ、表面張力の低いサラダ油、シリコーンオイル等に対する撥油性のある複合粒子及び塗膜の形成方法を提供する。【解決手段】平均一次粒子径が５〜１００ｎｍである無機粒子の表面にフルオロアルキルアクリレート樹脂又はフルオロアクリレート樹脂を含む被覆層が形成された樹脂被覆粒子が複数凝集して構成され、フッ素含有量が１．５〜７．５質量％であり、かつ体積基準の平均粒径(Ｄ50)が１〜１００μｍである撥水撥油性塗膜形成用複合粒子である。この複合粒子を溶媒に、溶媒１００質量％に対して複合粒子を１０〜２０質量％の割合で、分散させて分散液を調製し、この分散液を基材表面に塗布して撥水撥油性塗膜を形成する方法である。【選択図】図１