A kind of dark brown near-infrared reflective heat insulation coating and preparation method thereof

Abstract

The invention discloses a dark brown near-infrared reflective heat-insulating coating and a preparation method thereof. The composition and weight percentage of the heat-insulating coating of the invention are: film-forming material: 60.5-68.5, near-infrared reflective pigment: 23-27 , solvent: 8-12, additives: 0.3-0.5; wherein, the near-infrared reflective pigment has a general formula of Zn (1-x) Mg x Fe 2 o 4 powder, where x=0, 0.1, 0.2, 0.3 or 0.4. The preparation method of the present invention comprises: mixing the raw materials of the near-infrared reflective pigment, heating in a water bath, drying, and calcining to obtain the near-infrared reflective pigment powder; Then add near-infrared reflective pigments and stir evenly to fully disperse the pigments to obtain near-infrared reflective heat-insulating coatings. The heat-insulating paint of the invention is environmentally friendly and has good heat-reflecting and heat-blocking properties.

Description

technical field [0001] The invention belongs to the technical field of reflective heat-insulating coatings, in particular to a dark brown near-infrared reflective heat-insulating coating and a preparation method thereof, which are environmentally friendly and have good performance in reflecting and blocking solar heat energy. Background technique [0002] In the solar radiation energy, the ultraviolet band contains about 5%, the visible light band (400-700nm) contains about 43%, and the near-infrared band (700-2500nm) contains about 52%. The color near-infrared reflective heat insulation coating selectively absorbs and reflects waves of a certain frequency in the visible light range, so that the heat insulation coating presents a certain color to meet the aesthetic needs, and at the same time has a strong reflection in the near-infrared band to prevent sunlight The heat energy is transferred to the inside of the covering to reduce the indoor temperature, improve the working ...

AI Technical Summary

Problems solved by technology

At present, the pigments used in dark brown near-infrared reflective heat insulation coatings are mainly ferrochrome brown (PBR-29, PBR-33) and iron oxide brown (B-13), among which ferrochrome brown contains heavy metal chromium that is harmful to human body and environment. (Cr) oxides, and the dark brown near-infrared reflective heat-insulating coatings composed of these pigments need to be improved urgently to the reflection and barrier performance of solar heat energy.

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