A kind of black heat reflection pigment and its preparation method and application

A technology of heat-reflective pigments and black, applied in the direction of reflection/signal coatings, etc., can solve the problems of not meeting the requirements of heat-reflective pigments, increased production costs, expensive precursor raw materials, etc., and achieve low raw material costs, less equipment investment, near-infrared The effect of high reflectivity

Active Publication Date: 2021-11-16
广东白兔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reflective performance of industrial-grade carbon black pigments is very poor, and its reflectance in the near-infrared region is only about 5%.
Most of the black heat reflective pigments on the market are imported from developed countries such as Europe and the United States, which are expensive
Existing patent 1 (Chinese Publication No. CN108084740A) discloses a method for preparing an ultrafine near-infrared reflective heat-insulating black pigment, using iron, chromium, nickel, manganese, copper, aluminum, yttrium, and antimony ionic salts as raw materials to prepare Powder pigments have the advantages of small particle size, large specific surface area, and high uniformity; however, there are still shortcomings, mainly expensive precursor raw materials, which greatly increase production costs
The patent of Ferro Corporation of the United States (China Publication No. CN106164185A) discloses a preparation method of copper oxide infrared pigments, which improves the near-infrared reflectance of pigments by physical modification, but the infrared reflectance of the pigments can only reach 17.2%. , cannot meet the requirements for heat reflective pigments

Method used

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  • A kind of black heat reflection pigment and its preparation method and application
  • A kind of black heat reflection pigment and its preparation method and application
  • A kind of black heat reflection pigment and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0040] ZnO, CuO, Al 2 o 3 and Cr 2 o 3 According to the stoichiometric relationship Zn 1-x Cu x al 2-y Cr y o 4 Mixing where x=0.4, y=0.4. Add water and grinding balls to the mixed oxide, the mass ratio of the mixed oxide, water and grinding balls is 1:1:3, repeat at 400r / min, and ball mill for 3h to get the slurry; then put the slurry into the oven Medium drying, drying temperature is 90°C, drying time is 8h, to obtain a powder; then the obtained powder is ground and put into a muffle furnace for calcination, and the temperature is raised from room temperature in an air atmosphere, and the heating rate is 5 °C / min, heat up to 900 °C, keep warm for 8 hours, then cool down to room temperature at a cooling rate of 5 °C / min to obtain a calcined pigment sample, then ball mill the obtained sample at 400 r / min for 4 hours, and dry at 90 °C for 8 hours. Finally, a black heat-reflecting pigment was obtained with an average particle diameter of 1.2 μm.

Embodiment 2

[0042] ZnO, CuO, Al 2 o 3 and Cr 2 o 3 According to the stoichiometric relationship Zn 1-x Cu x al 2-y Cr y o 4 Mixing where x=0.5, y=0.3. Add water and grinding balls to the mixed oxide, the mass ratio of mixed oxide, water and grinding balls is 1:2:5, repeat at 300r / min, and ball mill for 4h to get the slurry; then put the slurry into the oven Medium drying, the drying temperature is 80°C, the drying time is 12h, and the powder is obtained; then the obtained powder is ground and put into a muffle furnace for calcination, and the temperature is raised from room temperature in an air atmosphere, and the heating rate is 5 °C / min, heat up to 1000 °C, keep it warm for 7 hours, and then cool down to room temperature at a cooling rate of 10 °C / min to obtain a calcined pigment sample, then ball mill the obtained sample at 500 r / min for 4 hours, and dry at 80 °C for 12 hours. Finally, a black heat-reflecting pigment was obtained with an average particle diameter of 1.5 μm. ...

Embodiment 3

[0044] ZnO, CuO, Al 2 o 3 and Cr 2 o 3 According to the stoichiometric relationship Zn 1-x Cu x al 2-y Cr y o 4 Mixed, where x=0.7, y=0.2. Add water and grinding balls to the mixed oxide, the mass ratio of mixed oxide, water and grinding balls is 2:3:9, repeat at 600r / min, ball mill for 2h to get the slurry; then put the slurry into the oven Medium drying, the drying temperature is 70°C, the drying time is 14h, and the powder is obtained; then the obtained powder is ground and put into a muffle furnace for calcination, and the temperature is raised from room temperature in an air atmosphere, and the heating rate is 8 °C / min, heat up to 1100°C, keep it warm for 6h, then cool down to room temperature at a cooling rate of 10°C / min to obtain a calcined pigment sample, then ball mill the obtained sample at 600r / min for 3h, and dry at 80°C for 12h. Finally, a black heat-reflecting pigment was obtained with an average particle diameter of 0.9 μm.

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Abstract

The invention relates to a black heat-reflecting pigment and its preparation method and application. The black heat-reflecting pigment comprises a composite oxide containing Zn, Cu, Al and Cr, and the chemical formula is Zn 1‑x Cu x al 2‑ y Cr y o 4 , where 0.4<x<0.8, 0<y<0.4.

Description

technical field [0001] The invention relates to a black heat-reflecting pigment and its preparation method and application, belonging to the technical field of inorganic oxide pigment preparation. Background technique [0002] At present, the heat reflective coatings on the market are mostly white, but white coatings can no longer meet people's requirements for exterior wall coatings. Pigment is a key factor in determining the performance of colored heat reflective coatings. The coloring of colored heat-reflective heat-insulating coatings is mainly achieved by adding pigments to white or low-covering coatings. Except for titanium dioxide, other traditional inorganic pigments and organic pigments have poor heat reflection performance in the infrared region and cannot meet the thermal requirements. Therefore, the development and application of heat-reflective pigments has become a research hotspot in the field of heat-reflective heat-insulation coatings. Inorganic heat refle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/33
CPCC08K3/22C08K2201/003C09D5/004
Inventor 高彦峰李华宋炳坷
Owner 广东白兔新材料科技有限公司
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