JP2007186682A5 - - Google Patents

Claims (8)

An aqueous dispersion of a cationic resin (A), the metal alkoxide or condensation product thereof (B) and then tetra-alkoxysilane or its condensate of the (x), aqueous coating composition containing an acid catalyst (C) Because
The average particle diameter of the aqueous dispersion of the cationic resin (A) is in the range of 0.01 to 0.4 μm, and the cationic resin (A) has a cationic functional group of 0.02 to 0. An aqueous coating composition containing 8 equivalent / kg . The aqueous coating composition according to claim 1, wherein the cationic resin (A) is a cationic urethane resin (A-1) or a cationic acrylic resin (A-2). The ratio of the mass of the cationic resin (A) to the mass (B1) after hydrolytic condensation of the metal alkoxide or its condensate (B) is 10 / in the mass ratio represented by (A) / (B1). The water-based coating composition according to claim 1 or 2, which is in the range of 90 to 70/30. An organic-inorganic composite coating film obtained by using the water-based coating composition according to claim 1 , wherein a cationic functional group is added in an amount of 0.02 to 0.8 in a matrix composed of a metal oxide (B ′). Ri eq / kg cationic resin containing (a) Tona, and an average particle size of area by der of 0.01~0.4μm particles wherein the dispersed organic-inorganic composite coating film. A cationic resin (A) containing a cationic functional group in an amount of 0.01 to 0.4 μm and containing an acid catalyst (C ) To adjust the pH to 1.0 to 3.0, and then a water-based coating composition obtained by adding a metal alkoxide or its condensate (B) containing tetraalkoxysilane or its condensate (x) Is coated on a substrate and dried to have an average particle diameter of 0.01 to 0.4 μm made of a cationic resin (A) containing 0.02 to 0.8 equivalent / kg of a cationic functional group . A method for producing an organic-inorganic composite coating film, comprising producing a composite coating film in which particles in a range are dispersed in a matrix composed of a metal oxide (B ′). The organic-inorganic composite coating film according to claim 5, wherein the metal alkoxide or the condensate (B) added to obtain the water-based coating composition further contains 3-glycidoxypropyltrimethoxysilane (y). Manufacturing method. The metal alkoxide or the condensate thereof (B) further contains 3-glycidoxypropyltrimethoxysilane (y), the hydrolyzed tetraalkoxysilane or the condensate mass (x1), and hydrolysis The ratio of the subsequent 3-glycidoxypropyltrimethoxysilane to the mass (y1) is in the range of 90/10 to 60/40 in the mass ratio represented by (x1) / (y1). The water-based coating composition according to claim 1, wherein tetraalkoxysilane or a condensate thereof and the 3-glycidoxypropyltrimethoxysilane are mixed. A metal containing a tetraalkoxysilane or a condensate (x) thereof after mixing the aqueous dispersion of the cationic resin (A) and the acid catalyst (C) and homogenizing the mixture to adjust the pH to 1.0 to 3.0. A method for producing an aqueous coating composition comprising mixing an alkoxide or a condensate thereof (B),
  The average particle diameter of the aqueous dispersion of the cationic resin (A) is in the range of 0.01 to 0.4 μm, and the cationic resin (A) has a cationic functional group of 0.02 to 0. The manufacturing method of the water-based coating composition characterized by containing 8 equivalent / kg.