Preparation method of ATO thermal insulation coating

A heat-insulating coating and ATO technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of uneven particle size distribution of ATO, affecting heat insulation effect, etc., achieve good heat insulation effect, stable performance, and improve dispersion effect of effect

Active Publication Date: 2016-05-25
LIUZHOU HAOXIANGTE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the deficiency of the existing nano-ATO coating preparation method, the ATO particle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation method of ATO thermal insulation paint of the present invention, it adopts the following steps:

[0022] First, add deionized water to the nano ATO powder and stir evenly to prepare a slurry, and then spray the evenly stirred slurry vertically through the nozzle to the surface of the high-speed rotating roller; during the implementation process, the mass flow rate of the slurry injection should be ensured. 6-8g / s, the vertical distance between the nozzle and the roller is 0.01-0.1mm, the diameter of the roller used at the same time is 40-50mm, and the rotation speed of the roller is 300-350r / min; in the implementation process, the role of the nozzle and the roller makes The slurry is dispersed for the first time, and the slurry thrown to the atomization chamber is impacted by high-speed gas to achieve the second dispersion; this makes the ATO particle size smaller, laying a good foundation for the preparation of stable coatings.

[0023] In the atomizati...

Embodiment 1

[0026] Take ATO powder with a particle size of about 30nm, add it to deionized water to prepare a 20wt% slurry, and then spray the slurry vertically through the nozzle to the surface of the rotating roller; keep the mass flow rate of the slurry injection at 6g / s, the nozzle The vertical distance from the roller is 0.01mm, the diameter of the roller is 40mm, and the rotation speed of the roller is 300r / min; at the same time, in the atomization chamber, maintain an angle of 45° with the horizontal direction, and flow argon at a flow rate of 30m / s Gas impact slurry; then recover gas from the upper side of the atomization chamber, collect ATO slurry from the bottom of the atomization chamber; then, slowly add 40wt% water-based polyurethane emulsion to the collected ATO slurry, wherein ATO slurry and water-based polyurethane emulsion The volume ratio of the mixture was 1:3, and the magnetic stirring speed was 250r / min for 50min and then left to stand to obtain the nano-ATO coating. ...

Embodiment 2

[0028] Take ATO powder with a particle size of about 35nm, add it into deionized water to prepare a 25wt% slurry, and then spray the slurry vertically to the surface of the rotating roller through the nozzle; keep the mass flow rate of the slurry injection at 7g / s, and the nozzle The vertical distance from the roller is 0.05mm, the diameter of the roller is 45mm, and the rotation speed of the roller is 320r / min; at the same time, in the atomization chamber, maintain an angle of 60° with the horizontal direction, and flow argon at a flow rate of 30m / s Gas impact slurry; then recover gas from the upper side of the atomization chamber, collect ATO slurry from the bottom of the atomization chamber; then, slowly add 30wt% water-based polyurethane emulsion to the collected ATO slurry, wherein ATO slurry and water-based polyurethane emulsion The volume ratio of the mixture was 1:4, and the magnetic stirring was performed at a speed of 300r / min for 40min and then left to stand to obtai...

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Abstract

The invention relates to the processing field of thermal insulation coatings, in particular to a preparation method of an ATO thermal insulation coating. The preparation method includes the steps that deionized water is added into nanometer ATO powder, the mixture is stirred evenly, and slurry is prepared; the evenly stirred slurry is perpendicularly jetted to the surface of a roller rotating at high speed through a jetting nozzle from top to bottom; the roller tosses the slurry to an atomizing chamber on one side to form slurry liquid drops; high-pressure inert gas is injected into the atomizing chamber from bottom to top to impact the slurry liquid drops; the inert gas is recycled from the upper side of the atomizing chamber, and the ATO slurry is collected from the lower side of the atomizing chamber; waterborne polyurethane emulsion is added into the collected ATO slurry, the mixture is stirred evenly and then stands, and the ATO thermal insulation coating is obtained. The jetted ATO slurry is crashed under the centrifugal force of the rotating roller and impacted by the high-speed inert gas, clustering of ATO particles in the slurry is broken, in this way, the dispersion effect of the ATO slurry is improved, and then the prepared ATO thermal insulation coating is stable in performance and good in thermal insulation effect.

Description

technical field [0001] The invention relates to the field of preparation of heat-insulating coatings, in particular to a preparation method of ATO heat-insulating coatings. Background technique [0002] At present, more and more coating manufacturers pay attention to nano-transparent heat-insulating coatings because they can transmit visible light and block infrared light well. Now, in China, research on this kind of coating is still in its infancy, and it is only applied to buildings and vehicles that run air-conditioning systems. Nano-ATO, or antimony-doped tin dioxide, is the main material in transparent thermal insulation coatings. It is a transparent N-type semiconductor material with good electrical conductivity. Nano-conductive particles contain a certain concentration of electron holes, which cause free current-carrying Absorption of particles: for the ultraviolet region (200-380nm) that accounts for 5% of the solar energy, ATO particles are almost completely absorb...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12
CPCC08K3/22C08K2003/2231C09D7/61C09D175/04
Inventor 易鉴荣林荔琍唐臻吴坚林荔珊
Owner LIUZHOU HAOXIANGTE SCI & TECH
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