Reflecting and thermal-insulating coating for buildings and preparation method of reflecting and thermal-insulating coating

Abstract

The invention discloses a reflecting and thermal-insulating coating for buildings and a preparation method of the reflecting and thermal-insulating coating. The reflecting and thermal-insulating coating contains the following components in parts by weight: 70-90 parts of a film forming substance, 10-20 parts of modified rutile type titanium dioxide, 5-15 parts of a thermal-insulating filling, 1-3 parts of a wetting dispersant, 0.5-1 part of a mildew preventive, 4-8 parts of a thickening agent, 1-3 parts of a defoaming agent, 6-12 parts of a film forming aid and 40-60 parts of deionized water, wherein the thermal-insulating filling is a modified hollow glass bead, and the modified hollow glass bead is mainly prepared from hollow glass beads, indium trichloride and zirconium oxychloride. The coating is relatively high in reflectivity and emissivity and low in heat conductivity coefficient, has a good thermal-insulating effect and can be applied to indoor thermal insulation.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a building reflective heat-insulating coating and a preparation method thereof. Background technique [0002] Architectural reflective and heat-insulating coatings are new functional architectural coatings that have been used and paid attention to in recent years. In the hot summer and warm winter and hot summer and cold winter climate regions where the summer temperature is too high in our country, the coating not only has the decorative effect of ordinary exterior wall coatings, but also can reflect solar radiant heat to reduce the surface temperature of the coating film, and reduce the damage caused by summer coating. A series of problems caused by the high surface temperature of the membrane. Although there are many researches on architectural reflective heat-insulating coatings, there are still many problems in practical applications, such as: unstable performa...

AI Technical Summary

Problems solved by technology

Although there are many studies on architectural reflective heat-insulating coatings, there are still many problems in practical applications, such as: unstable performance, although the reflective heat-insulating coatings reported in patent 200510028388. Single, mainly white or light-colored paint, with relatively large limitations, etc.

[0003] Architectural reflective heat-insulating coatings mainly include two types: solvent-based and water-soluble. The white heat-insulating coatings disclosed in Chinese patents with publication numbers CN103014 and CN1204677 are a kind of alkyd resin-based solvent-based reflective heat-insulating coatings. Low, only 3 to 5 years, and the volume used is mostly xylene, which pollutes the environment

Another Chinese patent whose publication number is CN102898905A uses fluororesin, fumed silica, hollow hollow glass microspheres and mixed organic solvents to prepare reflective heat-insulating coatings. Although this coating has high solar reflectance and hemispherical emissivity, its Most of the mixed solvents used are alcohols or esters, which will have a certain impact on the construction personnel and the surrounding environment

[0004] Therefore, the existing reflective and heat-insulating coatings for buildings restrict their application in the field of building energy conservation.