AQUEOUS COATING COMPOSITION, COATED ARTICLE, AND PRODUCTION METHOD OF COATED ARTICLE

• Main Authors: KIUCHI MASAYA, MIYAJIMA MAMORU, KURODA SHINICHI, MIURA WATARU
• Format: Patent
• Language: English; Japanese
• Published: 26.06.2024
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide an aqueous coating composition which exhibits definite luster even in face in addition to highlight and, on the other hand, can realize a design which looks like solid coating in shade.SOLUTION: An aqueous coating composition comprises: a film-forming resin; at least one of resin particles (A1) and an extender pigment (A2) each having an average particle diameter of 1 μm to 20 μm; an opaque pigment (B) having an average particle diameter of 100 nm to 450 nm ; and a scaly luster pigment (C) having an average particle diameter of 8 μm to 25 μm, where a pigment mass concentration PWCA of the total of the resin particles (A1) and the extender pigment (A2) is 0.5 mass% to 8 mass%, a pigment mass concentration PWCB of the opaque pigment (B) is 10 mass% to 18 mass%, and a ratio PWCB/PWCA of the pigment mass concentration PWCB of the opaque pigment (B) to the pigment mass concentration PWCA of the total of the resin particles (A1) and the extender pigment (A2) is 2 to 28.SELECTED DRAWING: Figure 2 【課題】ハイライトに加えてフェースにおいても明確な光輝感を発現し、一方、シェードではソリッド塗装のように見える意匠を実現できる、水性塗料組成物を提供する。【解決手段】塗膜形成性樹脂と、平均粒子径が１μｍ以上２０μｍ以下の樹脂粒子（Ａ１）および体質顔料（Ａ２）の少なくとも一方と、平均粒子径が１００ｎｍ以上４５０ｎｍ以下の不透明顔料（Ｂ）と、平均粒子径が８μｍ以上２５μｍ以下の鱗片状光輝性顔料（Ｃ）と、を含み、前記樹脂粒子（Ａ１）および前記体質顔料（Ａ２）の合計の顔料質量濃度ＰＷＣＡが、０．５質量％以上８質量％以下であり、前記不透明顔料（Ｂ）の顔料質量濃度ＰＷＣＢが、１０質量％以上１８質量％以下であり、前記樹脂粒子（Ａ１）および前記体質顔料（Ａ２）の合計の前記顔料質量濃度ＰＷＣＡに対する前記不透明顔料（Ｂ）の前記顔料質量濃度ＰＷＣＢの比ＰＷＣＢ／ＰＷＣＡが、２以上２８以下である、水性塗料組成物。【選択図】図２