Waterborne heat-insulating flame-retardant multifunctional nano coating and preparation method thereof

Abstract

The invention relates to a waterborne heat-insulating flame-retardant multifunctional nano coating and a preparation method thereof. The coating consists of the following components in part by weight: 48 to 52 parts of waterborne resin and 30 to 50 parts of nano pigment fillers (nano titanium dioxide, nano titanium dioxide-coated hollow glass microspheres, nano titanium dioxide-coated hollow ceramic microspheres and nano antimony-doped tin dioxide (ATO) particles), size and auxiliary materials such as film-forming additive and coupling agent. The preparation method includes the steps that: the nano fillers and the size are first dipped into the waterborne resin, the auxiliary materials are then sequentially added and stirred, and thereby the heat-insulating flame-retardant multifunctional nano coating is obtained. The processing technique is simple, the component proportion is reasonable, and the prepared coating has the advantages of high heat resistance, high reflectivity, high radiative heat conductivity, certain fire resistance, high-efficient heat insulation, excellent mechanical and chemical properties, environment-friendliness, stain resistance, flame retardance and energy saving. The coating can be coated on outside facilities such as outer walls and building roofs.

Description

technical field [0001] The invention relates to a water-based heat-insulating and flame-retardant multifunctional nano-coating and a preparation method thereof. The invention belongs to the technical field of nanometer functional coatings. Background technique [0002] my country's building thermal insulation coatings began to be developed and applied in the late 1980s. At that time, thermal insulation coatings for some irregularly shaped high-temperature pipes and equipment surfaces were mainly developed. The products put into use include "coated composite silicate thermal insulation material", "composite silicate thermal insulation coating", "magnesium silicate thermal insulation material", "rare earth thermal insulation coating" and so on. Because this type of coating needs to be resistant to high temperatures, it is generally not possible to use organic base materials, but to use inorganic silicate materials that can withstand a certain temperature, such as cement and w...

AI Technical Summary

Problems solved by technology

The main problem of this type of coating is that the coating is relatively late, the construction requirements are high, and the heat insulation effect is not significant enough; secondly, due to the high porosity of the coating, although the coating of the above heat insulation coating is relatively thick, its waterproof performance is still difficult. fulfil requirements

In addition, these heat-insulating coatings have not paid much attention to the stain resistance of the coating.

The patent application number is CN200410048047.1, which reduces the thermal conductivity by adding hollow ceramics to achieve heat insulation effect, but the coating uses the solvent xylene, which is harmful to the environment

The patent application number CN02134827.8 is a water-based heat-insulating coating using styrene-acrylic emulsion; the patent application number CN03147361.X only uses kaolin as the main filler to achieve heat insulation, and the heat insulation effect is relatively poor; the patent application number is The patent of CN95101625.3 achieves heat insulation effect by using talcum powder and waterproof heat insulation powder

However, these existing inventions rarely consider the stain resistance and weather resistance of the coating, and the waterproof performance cannot meet the requirements in addition.

[0005] In summary, single-function heat-insulating coatings have their own advantages and disadvantages. Therefore, a composite heat-insulating coating with multiple heat-insulating mechanisms is developed, which integrates three functions of heat resistance, reflection and radiation. Thin-layer multi-functional thermal insulation coatings with high emissivity are the development trend of building thermal insulation coatings in the future, but the research on the above coatings has not been reported at home and abroad.