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Preparation method and application of water-based silicon dioxide aerogel reflective heat insulation coating

A reflective heat-insulating coating, water-based silica technology, applied in the direction of reflection/signal coatings, coatings, etc., can solve the problems of long curing time, large thickness, large amount of glass beads or floating beads, etc., to achieve the preparation method The effect of simplicity, less economic investment, and high environmental returns

Active Publication Date: 2016-08-03
孙华杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the silica aerogels on the market are all hydrophobic, but this property limits its application in environmentally friendly water-based coatings, and more are used in solvent-based coatings, powder coatings, thicker Insulation felt and cement mortar insulation materials
Traditional water-based thermal insulation coatings achieve the effect of thermal insulation by adding glass microspheres or floating beads. However, due to the influence of the structure of glass microspheres and floating beads, traditional water-based thermal insulation coatings have limited thermal insulation effects. Glass beads Or the amount of floating beads added is large, and the surface fineness of the coating film is poor, etc.
In recent years, the application of airgel in thermal insulation materials mainly focuses on coating the surface of the material with a thickness of 2-30 mm, which has a large thickness, long curing time, large dosage, and relatively low cost. Disadvantages such as high and not environmentally friendly

Method used

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  • Preparation method and application of water-based silicon dioxide aerogel reflective heat insulation coating
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  • Preparation method and application of water-based silicon dioxide aerogel reflective heat insulation coating

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preparation example Construction

[0014] According to the above-mentioned preparation method, further, comprising: utilize silane coupling agent A-171 and / or silane coupling agent KH-560, nonionic surfactant, anion-nonionic active emulsifier to hydrophobic at 20-80 ℃ modify the surface of the silica airgel for 1-3 hours to obtain a modified airgel that is initially soluble in water; then add water-soluble polymer polyvinyl alcohol-2000 to the above-mentioned modified airgel that is initially soluble in water In the gel, stir and mix at 30-50°C for 2 hours, use it to coat the modified airgel, add distilled water to the coated modified airgel, stir and mix at 25-40°C for 1 hour, The modified silica airgel aqueous solution with good compatibility with the water-based resin is obtained.

[0015] According to the above preparation method, further, the mass ratio of hydrophobic silica airgel, modifier, water-soluble polymer polyvinyl alcohol-2000 and water is shown in Table 1, and the silane coupling agent A in the ...

Embodiment 1

[0032] As shown in Table 4, a certain amount of water, wetting agent, dispersant, defoamer, pigment and filler, and a modified silica airgel aqueous solution with a mass fraction of 10% were weighed to obtain the particle size by high-speed dispersion and grinding. Slurries smaller than 40 μm. Add film-forming substances, film-forming aids, preservatives, and leveling agents in turn, stir evenly, and add thickener to adjust to a reasonable viscosity.

[0033] Table 4

[0034]

[0035] Take the above-mentioned paint, and apply the above-mentioned paint on the flat surface of building or metal materials under the condition that the construction temperature is higher than 5°C. After the surface is dry, apply the next layer until it is completely dry to obtain the water-based silica airgel reflective thermal insulation coating 1.

Embodiment 2

[0037] As shown in Table 5, weigh a certain amount of water, wetting agent, dispersant, defoamer, pigment and filler, and a modified silica airgel aqueous solution with a mass fraction of 10% to obtain the particle size by high-speed dispersion and grinding. Slurries smaller than 40 μm. Add film-forming substances, film-forming aids, preservatives, and leveling agents in turn, stir evenly, and add thickener to adjust to a reasonable viscosity.

[0038] table 5

[0039]

[0040] Take the above-mentioned paint, and apply the above-mentioned paint on the flat surface of building or metal materials under the condition that the construction temperature is higher than 5°C. After the surface is dry, apply the next layer until it is completely dry to obtain the water-based silica airgel reflective thermal insulation coating 2.

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Abstract

The invention provides a preparation method and application of a water-based silicon dioxide aerogel reflective heat insulation coating. Much work is done for the surface modification of silicon dioxide aerogel so that on the premise of not influencing the microstructure characteristics, the effects of energy conservation, emission reduction, heat insulation and heat preservation can be realized by adding the treated silicon dioxide aerogel into a water-based heat insulation reflective coating while greenness and environmental protection are guaranteed; the preparation method is simple, the cost is low, and the water-based silicon dioxide aerogel reflective heat insulation coating is an energy-saving emission-reducing green coating with relatively small economic investment and relatively high environmental reward; and moreover, the invention also provides an application of the water-based silicon dioxide aerogel reflective heat insulation coating.

Description

technical field [0001] The invention relates to a preparation method and application of a water-based silica airgel reflective heat-insulating coating. It is used in heat insulation fields such as construction, petrochemical industry, automobiles, home appliances, sports machinery, tents, clothing, etc., and has the effect of energy saving, environmental protection and heat insulation. Background technique [0002] Airgel is a solid form of matter and is the smallest solid in the world. The most common airgel is silicon aerogel. Silica airgel is a lightweight nano-porous amorphous solid material with excellent thermal insulation properties. Its porosity is as high as 80-99.8%, the typical size of the pores is 1-100nm, and the specific surface area is 200-1000㎡ / g, while the density can be as low as 3kg / m 3 , Low thermal conductivity at room temperature is the solid material with the lowest thermal conductivity at present. [0003] The unique structural characteristics of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D125/14C09D5/33C09D7/12
CPCC08K3/36C08K9/10C08K13/06C09D5/004C09D7/62C09D125/14C09D143/04
Inventor 孙华杰
Owner 孙华杰
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