Multicolor infrared low-emissivity environmental protection coating

Abstract

The invention relates to a multicolor infrared low-emissivity environmental protection coating. The coating comprises a component A and a component B, and when in use, the component A and the component B are uniformly mixed according to the mass ratio of 1:10. The component A is aliphatic polyisocyanate; the component B comprises the following components in percent by mass: 20 to 30 percent of fluorocarbon resin, 35 to 50 percent of special pigment, 0 to 5 percent of filler, 1 to 5 percent of a dispersant, 0.1 to 1 percent of a flatting agent; 3 to 8 percent of a directing agent, 0.01 to 0.3 percent of a drier, and 15 to 25 percent of a mixed solvent, wherein the special pigment comprises the following pigments: 0 to 10 percent of titanium dioxide rutile, 0 to 5 percent of 1, 4 diketopyrrolopyrrole series organic red pigment, 0 to 25 percent of chromium oxide green, 0 to 8 percent of titanium-nickel yellow pigment, 0 to 5 percent of black pigment, and 50 to 95 percent of coated color metallic pigment. The average emissivity of the thermal infrared band of the coating is 0.40 to 0.65, and the heavy metal content meets the requirement.

Description

technical field [0001] The invention relates to an environment-friendly paint with colorful infrared low emissivity. Background technique [0002] With the rapid development of modern science and technology, the country pays more and more attention to the energy-saving and environmental protection effects of materials, and pays more and more attention to energy consumption while considering the improvement of productivity. become hot. The visible light-near-infrared band is the main area where sunlight generates heat. The infrared radiation in the 3-5 μm and 8-14 μm atmospheric windows in the mid-infrared region mainly comes from the thermal radiation of the object and the background itself. Materials with low emission characteristics can reduce or change the object itself. It is the preferred material for infrared camouflage to realize the adaptation of the comprehensive scattering characteristics and the background. The high reflective properties of metal materials make ...

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Problems solved by technology

However, aluminum powder also has the problems of strong visible light reflection, which is not conducive to visible light concealment; poor oxidation resistance, and the emissivity rises sharply after oxidation. Therefore, it is also subject to many restrictions in practical applications.

In addition, ordinary heat-reflective coatings are colored with inorganic chrome yellow pigments. Although they have a high solar reflectance, the hexavalent chromium in the coatings will cause serious harm to the human body and cause serious environmental pollution. It cannot meet the national standards and is harmful to the human body. Requirements for allowable limits of heavy metal substances

Chinese patent application numbers 201310248696.5 and 201310250312.3 disclose two kinds of infrared low-emissivity green and khaki paints and their preparation methods, which are compatible with visible light-near infrared bands, but this invention only involves 8-14μm atmospheric windows, and the emissivity of green paints Above 0.65, the emissivity of khaki paint is above 0.56, and the emissivity needs to be further reduced

Chinese patent application number 201210079320.1 discloses a low-emissivity infrared coating and its preparation method. The average emissivity of 3-5 μm is lower than 0.35, and the average emissivity of 8-14 μm is lower than 0.45. Emissivity, which needs to be further improved in terms of visible light-near infrared color compatibility

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