TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The hydrolysable silicon compound is hydrolysable silicon compound having vinyl polymeric group. The polymer emulsion particles are obtained by polymerizing in the polymerization stock solution in presence of seed particles which forms the core layer. The seed particles are obtained by polymerizing hydrolysable silicon compound, vinyl monomer having secondary and/or tertiary amide group and/or other vinyl monomer copolymerizable with vinyl monomer having secondary and/or tertiary amide group. The individual metallic compound particles includes modified metallic compound formed by modifying the individual metallic compound particles using modifier compound which has structural units chosen from components (A') including tri organosilane unit of formula: R3Si, mono-oxydi organosilane unit of formula: -(R2SiO)-, dioxy organosilane unit of formula: -Si(-R)(-O-)-O-, trioxy silane unit of formula: -Si(-O-)(-O-)-O- and/or difluoromethylene unit. The individual metallic compound includes silicon dioxide and metal oxide having photocatalytic activity or metal oxide having electroconductivity.R=linear or branched 1-30C alkyl, 5-20C cycloalkyl, linear or branched 1-30C fluoroalkyl, linear or branched 2-30C alkenyl, phenyl, 1-20C alkoxy or hydroxy.Preferred Property: The mass ratio of vinyl monomer having secondary and/or tertiary amide group and polymer emulsion particles is 0.1/1-0.5/1, and the mass ratio of vinyl monomer having secondary and/or tertiary amide group and individual metallic particles is 0.1/1-1/1. The polymer emulsion particles have core/shell structure equipped with core layer and shell layer(s) which covers the core layer. The mass ratio of vinyl monomer having secondary and/or tertiary amide group and hydrolysable silicon compound in the core layer is 0.01/1-1/1, and the mass ratio of vinyl monomer having secondary and/or tertiary amide group and hydrolysable silicon compound in the core layer is 0.1/1-5/1. The mass ratio of hydrolysable silicon compound having vinyl polymeric group and polymer emulsion particles is 0.01/100-20/100. The mass ratio of hydrolysable silicon compound having vinyl polymeric group and vinyl monomer having secondary and/or tertiary amide group is 0.1/100-100/100. The ratio of the length and diameter of individual metallic compound is 1/1-20/1. The component (A') has photocatalytic activity and ratio of length and particle diameter of 1/1-20/1. The coating film has haze value of 20 or less, and ultraviolet-light-transmission rate of 99% or less at 340 nm wavelength.