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Paint filler with low absorptivity and high emissivity

A technology with high emissivity and low absorptivity, applied in the fields of material science and engineering science, can solve the problems of unsatisfactory radiation cooling effect, insufficient solar absorptivity, high price of titanium dioxide, etc., and achieve great application value and social value, Inexpensive, good radiation cooling and reflective cooling effect

Inactive Publication Date: 2010-03-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for ordinary heat-reflecting coatings on the market, their solar absorption rate is not low enough, or the radiative cooling effect at night is not ideal, and the price of titanium dioxide, which mainly plays a role in heat reflection, is too high, reaching one yuan per ton. More than 10,000 yuan, the cost is too high

Method used

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  • Paint filler with low absorptivity and high emissivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 . Sample preparation for the emissivity and absorptivity determination of the filler: Grind the filler to be tested, then use acrylic, silicone and other adhesives to make a coating, and coat it on a 40mm×40mm×1mm aluminum substrate test piece. Dry it in the dusty place, and use FXL-1 Absorption / Emission Ratio Meter to measure its hair-to-emission rate and absorption rate.

[0029] The above-mentioned paint exposure experiment and the measurement of radiation cooling effect: adopt such as figure 1 The device shown was performed. When conducting the exposure experiment, the device was placed indoors for a day and night to achieve thermal equilibrium with the environment. During the experiment, the device coated with the paint was placed in the outdoor sunlight in a sunny or breezy weather, and the temperature inside each device and the ambient temperature were measured every half hour. Place the device under a clear night sky to test the temperature of t...

Embodiment 2

[0038] Adopt following proportioning ratio (mass ratio) mixture:

[0039] Alkaline earth metal carbonates 85%

[0040] Alkaline earth metal sulphates 5%

[0041] Alkaline earth metal silicate 5%

[0042] Alkaline earth metal aluminates 3%

[0043] Alkaline earth metal fluoroaluminate 2%

[0044] After it is ground into powder, the filler of the present invention is prepared, and then mixed and mixed according to filler: acrylic binder=1: 0.05 (mass ratio) to form a coating, which is coated on the aluminum plate substrate test piece of 40mm * 40mm * 1mm, and placed Dry it in an indoor environment, and use the FXL-1 absorption / emission ratio tester to measure the emission rate to 0.90 and the absorption rate to 0.45. use figure 1 The experimental device shown has a cooling effect of 7°C.

Embodiment 3

[0046] Adopt following proportioning ratio (mass ratio) mixture:

[0047] Alkaline earth metal carbonates 90%

[0048] Alkaline Earth Sulfates 3%

[0049] Alkaline earth metal silicate 2%

[0050] Alkaline earth metal aluminates 2%

[0051] Alkaline earth metal fluoroaluminate 3%

[0052]After it is ground into powder, the filler of the present invention is prepared, and then mixed and mixed according to filler: acrylic binder=1: 0.05 (mass ratio) to form a coating, which is coated on the aluminum plate substrate test piece of 40mm * 40mm * 1mm, and placed Dry it in the indoor environment, and use the FXL-1 absorption / emission ratio measuring instrument to measure the emission rate to 0.92 and the absorption rate to 0.42. use figure 1 The experimental device shown has a cooling effect of 9°C.

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Abstract

The invention provides a paint filler with low absorptivity and high emissivity, which relates to a paint filler material which has high solar reflectivity and high radiance of emissivity. The filleris the mixture of carbonate, sulfate, silicate, aluminate and fluoaluminate of alkaline-earth metals. By using the paint produced by the filler for coating, the indoor temperature of the hot area in which the temperature needs to be lowered can be lowered by 5-10 DEG C under the condition that mineral energy resources are not consumed.

Description

technical field [0001] The invention relates to a paint filler with low absorption rate and high emissivity, which belongs to the technical field of material science and engineering science. Background technique [0002] Warm in winter and cool in summer has been the dream of human beings since ancient times. Unfortunately, in reality, it is often cold in winter and hot in summer. It is difficult for the building itself to achieve the effect of warm in winter and cool in summer due to its own limitations. Since modern times, with the advancement of science and technology, the construction industry has also entered a stage of rapid development. Various new technologies and new materials have been successfully applied to buildings, which have greatly improved the functions of buildings, and the human living environment has become more and more comfortable. , but the most common way to create a comfortable environment in buildings is artificial heating and cooling, which consum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D5/33
Inventor 马一平
Owner TONGJI UNIV
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