Method for preparing color hollow glass bead insulation coating through using chemical coating technology

Abstract

The invention discloses a method for preparing a color hollow glass bead insulation coating through using a chemical coating technology. A chromium trichloride hexahydrate solution is hydrolyzed to generate a chromic oxide crystal, and the chromic oxide crystal precipitates and coats the surface of a hollow glass bead. The concentration of the chromium trichloride hexahydrate solution is reasonably controlled in the hydrolysis process to make the hollow glass bead uniformly coated with a chromic oxide film, so the dispersibility is obviously improved, the color hollow glass bead has a good heat conduction coefficient; and the greenness of the chromic oxide is introduced, so the color hollow glass bead has a high reflectivity on lights in 500-550 nm and 780-2300 nm wavebands, and remarkablyimproves the light reflection effect. The method improves the problem of unsatisfactory dispersibility of the hollow glass bead in an aqueous coating, introduces the color to the hollow glass bead, makes the hollow glass bead have the ability to become a colorizing functional pigment filler, and provides a new preparation technology for the preparation of a color composite exterior wall heat insulation coating.

Description

technical field [0001] The invention relates to the technical field of reflective heat-insulating coatings, in particular to a method for preparing colored hollow glass microspheres for heat-insulating coatings by using a chemical coating method. Background technique [0002] It is clearly stipulated in the "Building Thermal Design Code" that in hot summer areas, architectural design must fully consider its thermal insulation requirements. Composite exterior wall thermal insulation coating can reduce the absorption of heat from the sun by effectively reflecting sunlight, reducing the heat conduction efficiency in the wall, and radiating the heat energy of the exterior wall through infrared rays. , To a certain extent, it blocks the conduction of heat from the outside of the wall to the interior, can significantly improve the indoor temperature, and reduce energy consumption, which has attracted more and more attention from the society. At this stage, the research is relativ...

AI Technical Summary

Problems solved by technology

However, the poor dispersion and uniformity of color of hollow glass microspheres in water-based coatings limit their application in water-based color thermal insulation coatings.