Nippon Paint Holdings Co., Ltd.

Yoichi Adachi

Go Suzuki

Takeshi Fujita

Isamu Onishi

Kazuyuki Kamaya

Provided is an infrared-reflective coating composition that includes: a scale-like infrared-reflective pigment; and a resin component, wherein the pigment includes a layered body that has dielectric layers and a metal thin film layer layered in an alternate fashion with the dielectric layer on the outermost layer; the dielectric layer is formed from one or more materials such as titanium dioxide; the metal thin film layer is formed from a silver compound; a film thickness of the metal thin film layer is 5 to 15 nm; a film thickness of the dielectric layer is ((N&#x3bb;)/(4r))&#xb1;20 nm (N=1, 2 or 3) wherein wavelength &#x3bb; of incident light is 250 to 980 nm, and r is a refractive index of the dielectric layer; and a proportion of the infrared-reflective pigment having a particle diameter of 1 &#x3bc;m or smaller is 10% by volume or smaller.

Infrared reflective coating composition

Provided is a multi-layer coating film including a base film and an infrared-reflective film, wherein the infrared-reflective film includes a scale-like infrared-reflective pigment and a resin; the pigment includes a layered body that has dielectric layers and a metal layer layered in an alternate fashion with the dielectric layer on the outermost layer; the dielectric layer is formed from one or more materials such as titanium dioxide; the metal layer is made from a silver compound; a film thickness of the metal layer is 5 to 15 nm; a film thickness of the dielectric layer is ((N&#x3bb;)/(4r))&#xb1;20 nm (N is 1, 2 or 3, wavelength &#x3bb; is 250 to 980 nm, r is the refractive index of the dielectric layer); the infrared reflectance R1 of the base film is smaller than 80% and is smaller than the infrared reflectance R2 of the infrared-reflective film.

Multi-layer coating film with high infrared-light reflectivity and high visible-light transmissivity and forming method thereof

To provide an infrared-reflective pigment and infrared-reflective coating composition provided with both high infrared-light reflecting properties and high visible-light transparency. Provided is a flake-shaped infrared-reflective pigment, the infrared-reflective pigmentcharacterized by being provided with a layered bodyhaving at least one metal thin-film layerand at least two transparent dielectric layers, the film thickness of the dielectric layerbeing (an integer multiple of &#x3bb;/4n)&#xb1;10 nm, where &#x3bb; is the wavelength of incident light in a visible-light peripheral region and n is the refractive index of the dielectric layer. Also provided is an infrared-reflective coating composition containing the infrared-reflective pigment

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Osaka, Japan

Yoichi Adachi