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Preparation method of water-based light-reflective coating used on solar mirror surface

A technology of reflective coatings and solar energy, which is applied in the direction of reflection/signal coatings, polyester coatings, coatings, etc., can solve the problems of decreased adhesion, decreased reflectivity, and low salt spray resistance, and achieves excellent salt spray resistance. The effect of increasing reflectivity

Inactive Publication Date: 2015-02-18
WUXI SUNOCEAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the salt spray resistance performance of the reflective coating on the conventional solar mirror surface is not high, and the problems of decreased adhesion and light reflection rate will occur under long-term salt spray conditions, and the preparation method has been carried out. Improvement, a preparation method for water-based reflective coatings used on solar mirrors is proposed

Method used

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  • Preparation method of water-based light-reflective coating used on solar mirror surface

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the water-based reflective paint used on the solar mirror, the steps are as follows:

[0026] Step 1: Add 20g of n-butyl titanate and 10g of tetraethyl orthosilicate into 400g of water, then add 80g of ethanol and 10g of silver nitrate, stir evenly, raise the temperature to 40°C, add 40g of hydrochloric acid aqueous solution dropwise, and add 40g of hydrochloric acid aqueous solution The concentration is 5wt%. After the dropwise addition is completed, cool down to room temperature and age. The aging time is 48h to obtain the aged sol;

[0027] Step 2, sol, water-based alkyd resin 20g, glycerin 10g, sorbitol 5g, ethanol 30g, amyl nitrate 5g, pentaerythritol 5g, sodium borate 2g, thickener dipolyurea 2g, methylcellulose 5g, ten Take 5g of octaalkyldimethylbenzyl ammonium chloride, stir evenly, and the stirring speed is 600 rpm.

[0028]

Embodiment 2

[0030] The preparation method of the water-based reflective paint used on the solar mirror, the steps are as follows:

[0031] Step 1: Add 30g of n-butyl titanate and 20g of tetraethyl orthosilicate into 600g of water, then add 100g of ethanol and 30g of silver nitrate, stir evenly, raise the temperature to 60°C, add 70g of hydrochloric acid aqueous solution dropwise, and add 70g of hydrochloric acid aqueous solution The concentration is 15wt%. After the dropwise addition is completed, cool down to room temperature and age for 72 hours to obtain the aged sol;

[0032] Step 2, sol, water-based alkyd resin 30g, glycerin 20g, sorbitol 10g, ethanol 40g, amyl nitrate 10g, pentaerythritol 10g, sodium borate 4g, thickener dipolyurea 4g, methylcellulose 10g, ten 10g of octaalkyl dimethyl benzyl ammonium chloride, stir evenly, and the stirring speed is 800 rpm.

[0033]

Embodiment 3

[0035] The preparation method of the water-based reflective paint used on the solar mirror, the steps are as follows:

[0036] Step 1: Add 25g of n-butyl titanate and 15g of tetraethyl orthosilicate into 500g of water, then add 90g of ethanol and 20g of silver nitrate, stir evenly, raise the temperature to 50°C, add 60g of hydrochloric acid aqueous solution dropwise, and add 60g of hydrochloric acid aqueous solution The concentration is 10wt%. After the dropwise addition is completed, cool down to room temperature and age for 60 hours to obtain the aged sol;

[0037] Step 2, sol, water-based alkyd resin 25g, glycerin 15g, sorbitol 7g, ethanol 35g, amyl nitrate 7g, pentaerythritol 7g, sodium borate 3g, thickener dipolyurea 3g, methylcellulose 7g, ten Take 8g of octaalkyldimethylbenzyl ammonium chloride, stir evenly, and the stirring speed is 700 rpm.

[0038]

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Abstract

The invention relates to a preparation method of a water-based light-reflective coating used on a solar mirror surface, and belongs to the technical field of solar devices. The method comprises the following steps: adding tetrabutyl titanate and tetraethyl orthosilicate into water, then adding ethyl alcohol and silver nitrate, evenly stirring, heating, dropwise adding a hydrochloric acid aqueous solution, cooling to a room temperature after the adding of the hydrochloric acid aqueous solution and aging so as to obtain an aged sol; and evenly stirring the sol, water-based alkyd resin, glycerin, sorbitol, ethyl alcohol, amyl nitrate, pentaerythritol, sodium borate, a thickening agent, celluloses and a surfactant so as to obtain the water-based light-reflective coating. According to the method, the sol containing inorganic particles is prepared via a sol-gel method, and the sol and the water-based resin materials are prepared into the coating used on the mirror surface. The coating has the characteristic of excellent salt spray resistance and is capable of improving the light reflectivity at the same time.

Description

[0001] technical field [0002] The invention relates to a preparation method of a water-based reflective coating used on a solar mirror, and belongs to the technical field of solar devices. [0003] Background technique [0004] The solar reflector is one of the core components of the trough-type medium and high temperature heat collection system, which is divided into glass mirror, ceramic mirror, metal mirror and so on. Depending on the required temperature, reflectors of different materials can be used. The metal mirror has a very high reflectivity, the reflectivity can reach more than 95%, it can collect the diffuse reflected light of solar energy, and organize and focus the light, which can effectively improve the working temperature of the heat collector, and the light collection temperature can reach 100-300 degrees. [0005] However, conventional reflective coatings have low salt spray resistance, and the problems of decreased adhesion and reflective rate will oc...

Claims

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Application Information

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IPC IPC(8): C09D167/08C09D5/33C09D7/12
CPCC08K2003/2241C09D167/08C08K2201/014C09D5/004C09D7/61C08L1/28C08K13/02C08K3/36C08K5/053C08K5/10C08K3/38C08K5/19
Inventor 黄新东刘天人
Owner WUXI SUNOCEAN
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