Nanometer reflective heat-insulation coating for exterior wall and preparation technique thereof

Abstract

The invention discloses a nanometer reflective heat-insulation coating for the exterior wall and a preparation technique thereof. The nanometer reflective heat-insulation coating comprises, by weight, water, hydroxyethyl cellulose, 2-amino-2-methyl-1-propyl alcohol, polyarylic acid ammonium salt dispersant, alcohol surfactant, defoamer, CMIT / MIT compound, coalescing agent, 1-2 parts of propylene glycol or glycerin, 10-25 parts of modified rutile titanium dioxide, 2-5 parts of filler, nanocrystalline metal hybrid pulp, colored hollow ceramic microbeads, 22-45 parts of emulsion, 0.05-0.5 part of leveling agent and alkali swelling type thickener. The nanometer metal hybrid pulp is obtained by adding nanosized silica monomer solution, nanometer aluminum oxide monomer solution, nano-zinc oxide monomer solution and nanometer titanium oxide monomer solution into a reactor, stirring, dispersing and filtering under the operating pressure of 0.5 MP at the room temperature. The nanometer reflective heat-insulation coating has excellent radiation and reflection function for broad spectrum of sunlight, solar reflection ratio and hemisphere emissivity of the coating can be increased, heat insulation effect is better than that of conventional products, production is facilitated, and normal performance of the coating is unaffected.

Description

technical field [0001] The invention relates to the field of architectural coatings, in particular to a nano-reflective heat-insulating coating for building exterior walls and a preparation process thereof. Background technique [0002] With the increasing depletion of non-renewable resources, a new type of industrial revolution has been launched in the world, which is defined as Industrial Revolution 3.0 in the industry. From this, electric vehicles and the world's largest solar-powered aircraft are unveiled. It can be seen that the future industry will be dominated by environmental protection, green energy conservation. [0003] The Chinese government has been paying attention to innovations in environmental protection and energy saving, and the requirements for environmental protection and energy saving in buildings are also being further improved. Many external wall insulation materials are springing up like mushrooms. From XPS and EPS panels to exterior wall insulatio...

AI Technical Summary

Problems solved by technology

However, the existing reflective heat-insulating coatings can only effectively reflect the heat energy of sunlight in the case of high brightness, and the reflection efficiency is greatly reduced in the case of medium and low brightness.

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