Preparation method of waterborne polyurethane reflective insulation coating

Abstract

The invention provides a preparation method of waterborne polyurethane reflective insulation coating. The coating is formed by blending a first component and a second component according to the ratio of {4-10}:1. The first component is prepared from waterborne polyhydroxy hydroxy acrylic resin, high near-infrared reflection white pigment, silicon dioxide aerogel, filler, high near-infrared reflection yellow pigment, high near-infrared reflection brown pigment, high near-infrared reflection red pigment, high near-infrared reflection blue pigment, high near-infrared reflection black pigment, deionized water and auxiliaries. The second component is prepared from waterborne aliphatic polyisocyanate based on HDI, and propylene glycol monomethyl ether. The preparation method includes the steps of conducting drying, preparing the first component, preparing the second component and blending the first component and the second component. The coating has high near-infrared reflectivity, high medium-and-far-infrared reflectivity and low heat conductivity and can be applied to building external walls, absorption of the external walls to sunlight radiation energy can be remarkably reduced, indoor temperature is reduced, the heat insulation temperature difference can reach more than 10 DEG C, and energy consumption of an air conditioner is reduced.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method of a water-based polyurethane reflective heat-insulating coating. Background technique [0002] Researchers have done a lot of work on reflective heat-insulating coatings, and some heat-reflecting coatings have been applied in certain fields, such as white reflective heat-insulating coatings with application number 201110114940.X, white heat-reflective energy-saving coatings with application number 201110096710. Coatings, patent number ZL200910137811.5, a low-solar-absorption energy-saving medium-gray hull finish paint, application number 201110093093.3, a color coating with reflective and heat-insulating functions, etc. [0003] In terms of water-based reflective heat-insulating coatings, application number 201010623863.6 discloses a sea-gray water-based polyurethane heat-reflecting coating and its application, but it does not specify a specific...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned reflective and heat-insulating coatings mainly cool down through a single mechanism of heat reflection or heat insulation. The problem of synergistic cooling of reflection, heat insulation and radiation is not considered comprehensively. The heat-reflecting pigments used are mainly organic pigments, which are prone to failure, while black It is obtained by compounding three kinds of pigments, red, yellow and blue. The use of multiple pigments increases the difficulty of color matching

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