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A solar heat-absorbing coating with high light absorption rate

A technology of solar heat absorption and light absorption rate, which is applied in the field of solar coatings, can solve the problems of high cost, instability, and limitation, and achieve the effects of high absorption rate, high degree of dispersion, and good anti-flocculation

Active Publication Date: 2018-09-21
海丰县美达化工涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN 102286243 B uses a spinel-type pigment as a light absorbing agent to increase the absorption rate of sunlight, but it uses the sol-gel self-propagating combustion method to prepare and calcinate at a certain temperature. Spar-type pigments, due to the difference in calcination temperature, will affect the structure and performance of the product, which is restrictive and unstable; there are also heat-absorbing coatings prepared by using various nano-materials to improve the absorption rate of coatings on sunlight , but the cost is too high, such as Chinese patent CN 103589275 A

Method used

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  • A solar heat-absorbing coating with high light absorption rate
  • A solar heat-absorbing coating with high light absorption rate

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of solar paint with high light absorption rate, its raw material is:

[0025] Resin: modified polyurethane resin 55Kg;

[0026] Light absorbing agent: use channel black 35Kg, iron oxide black 30Kg, red powder 8Kg, modified phthalocyanine blue 20Kg, talcum powder 3Kg and aluminum powder 4Kg;

[0027] Solvent: a mixture of acetone and toluene (volume ratio 9:1);

[0028] Auxiliaries are defoamers, plasticizers and drier, wherein,

[0029] Defoamer: polyoxyethylene polyoxypropylene pentaerythritol ether 1Kg;

[0030] Plasticizer: diethyl phthalate 1Kg;

[0031] Drying agent: manganese dioxide naphthenic acid soap 1Kg, cobalt naphthenic acid soap 1Kg;

[0032] The steps of preparing a solar heat absorbing coating with high light absorption rate according to the above-mentioned raw materials are as follows:

[0033] (1) First, take out 15Kg of phthalocyanine blue in parts by weight, add 40mL of concentrated sulfuric acid, stir for 5min, heat to 80°C and reflux, s...

Embodiment 2

[0037] A kind of solar paint with high light absorption rate, its raw material is:

[0038] Resin: modified polyurethane resin 65Kg;

[0039] Light absorbing agent: use channel black 37Kg, iron oxide black 32Kg, red powder 10Kg, modified phthalocyanine blue 22Kg, talcum powder 4Kg and aluminum powder 6Kg;

[0040] Solvent: a mixture of tetrahydrofuran and toluene (volume ratio 9:1);

[0041] Auxiliaries are defoamers, plasticizers and drier, wherein,

[0042] Defoamer: polyoxyethylene polyoxypropanolamine ether 1Kg;

[0043] Plasticizer: dibutyl phthalate 1.5Kg;

[0044] Drying agent: lead naphthenic acid soap 1Kg, cobalt naphthenic acid soap 1Kg;

[0045] The steps of preparing a solar heat absorbing coating with high light absorption rate according to the above-mentioned raw materials are as follows:

[0046] (1) First take out 18Kg of phthalocyanine blue according to the ratio of parts by weight, add 45mL of concentrated sulfuric acid, stir for 8min, heat to reflux at 90...

Embodiment 3

[0050] A kind of solar paint with high light absorption rate, its raw material is:

[0051] Resin: modified polyurethane resin 75Kg;

[0052] Light absorbing agent: use channel black 40Kg, iron oxide black 35Kg, red powder 12Kg, modified phthalocyanine blue 25Kg, talcum powder 5Kg and aluminum powder 8Kg;

[0053] Solvent: ethyl acetate and phosphoric acid mixture (volume ratio 9:1);

[0054] Auxiliaries are defoamers, plasticizers and drier, wherein,

[0055] Defoamer: polyoxypropylene glyceryl ether 3Kg;

[0056] Plasticizer: dibutyl phthalate 2Kg;

[0057] Drying agent: lead naphthenic acid soap 1Kg, cobalt naphthenic acid soap 1Kg, manganese dioxide naphthenic acid soap 1Kg;

[0058] The steps of preparing a solar heat absorbing coating with high light absorption rate according to the above-mentioned raw materials are as follows:

[0059] (1) First take out 20Kg of phthalocyanine blue according to the ratio of parts by weight, add 50mL of concentrated sulfuric acid, s...

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Abstract

The invention discloses a high-light-absorptivity solar heat-absorbing paint which can be used for any heat collection device capable of converting solar energy into heat energy. The paint is formed by dispersing and uniformly mixing a resin, a light absorber, a solvent and aids according to certain parts by weight by a sand mill. By using the light absorber treated by a novel simple mode as the critical raw material for preparing the paint, the sunlight absorptivity of the paint is greatly enhanced, so that the light-heat conversion efficiency of the heat collection device is enhanced. Besides, the paint has the advantages of excellent weather resistance and longer service life.

Description

【Technical field】 [0001] The invention relates to a heat-absorbing coating, in particular to a solar coating with high absorption rate of sunlight. 【Background technique】 [0002] In today's world where energy is increasingly scarce and environmental pollution is becoming more and more serious, as the cleanest energy source, solar energy utilization has been widely valued at home and abroad, among which the thermal utilization research and application of solar energy is one of the very important methods. However, due to the low energy density of solar energy, the direct utilization efficiency is low, or even unusable. Therefore, the absorptivity of solar coatings to sunlight has become the core of utilizing solar energy. Solar coatings mainly include solar reflecting coatings and solar absorbing coatings. Reflective solar coatings are mainly used for thermal insulation of buildings, while absorbing ones are used for Building insulation and solar energy collection and appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/32C09D7/61C09D7/62
CPCC09D5/32C09D7/41C09D7/61C09D7/63C09D7/65C09D175/04C08L71/02C08K13/06C08K9/04C08K5/3417C08K3/04C08K2003/2275C08K3/34C08K2003/0812
Inventor 王自宇
Owner 海丰县美达化工涂料有限公司
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