Sodium-zinc-phosphate-based pigment with high sunlight reflective property, and preparation method thereof

A zinc-sodium phosphate-based technology with reflective properties, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of decreased color stability performance, complex pigment preparation process, and less stable coloring than inorganic pigments. , to achieve the effect of good coloring stability, low firing temperature and simple preparation process

Inactive Publication Date: 2013-01-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of organic pigment has a good coloring effect, but under the irradiation of sunlight, due to the damage of ultraviolet rays to organic matter, the stability of its color decreases, and it has a certain degree of volatility.
For the composite of organic and inorganic materials, people have developed a new type of raw material that is coated with colored organic pigments and has infrared reflection properties on the outside of inorganic white pigments or fillers. Such inorganic fillers include titanium dioxide, zinc oxide, etc., and organic pigments include anthraquinone, phthalate Cyanine, Nitrogen, etc., such as reflective pigments prepared by wrapping titanium dioxide with phthalocyanine blue (Su Dagen, Ye Feng, etc. Infrared reflective pigments prepared by wrapping TiO2 with phthalocyanine dyes[J]. Electroplating and Finishing. 2011,30(1):75 -77), but the preparation process of this composite pigment is complicated, and the coloring stability is not as good as that of inorganic pigments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Weigh the three samples according to the molar ratio of zinc oxide: sodium tripolyphosphate: bismuth oxide being 1.0:0.32:0.038;

[0019] (2) Mix the weighed samples and place them in a ball mill jar for ball milling, set the speed at 1000r / min, and mill for 20 minutes to obtain a well-mixed mixture;

[0020] (3) Take out the mixture obtained in step (2) and place it in a crucible, and fire it in a resistance furnace at 1000°C, then keep it at this temperature for 2.0h, and after cooling, grind it to obtain a yellow pigment. Visible-near-infrared spectrophotometer detection, the average solar reflectance of the pigment is 86.6%, which is higher than 71% of the yellow infrared reflective pigment (Zheng Gongshao. Infrared reflective pigment and its application [J]. Shanghai Paint. 2008 , 46(12):19-23).

Embodiment 2

[0022] (1) Weigh the three samples according to the molar ratio of zinc oxide: sodium tripolyphosphate: iron oxide being 1.0:0.32:0.102;

[0023] (2) Mix the weighed samples and place them in a ball mill jar for ball milling, set the speed at 1000r / min, and mill for 20 minutes to make the samples evenly mixed;

[0024] (3) The mixture obtained in step (2) was taken out and placed in a crucible, fired in a resistance furnace at 1100°C, and then kept at this temperature for 1.0h. After cooling, the reddish-brown pigment was ground by grinding, and the solar reflectance of the pigment was detected by an ultraviolet-visible-near-infrared spectrophotometer. The average solar reflectance of the pigment was 67.38%, which was higher than the 51% of the reddish-brown infrared reflective pigment reported in research (Zheng Gong Shao. Infrared reflective pigments and their applications [J]. Shanghai Paint. 2008, 46(12):19-23).

Embodiment 3

[0026] (1) Weigh the three samples according to the molar ratio of zinc oxide: sodium tripolyphosphate: copper oxide being 1.0:0.32:0.051;

[0027] (2) Mix the weighed samples and place them in a ball mill jar for ball milling, set the speed at 1200r / min, and mill for 50min to obtain a mixture;

[0028] (3) Take out the mixture obtained in step (2) and place it in a crucible, and fire it in a resistance furnace at 900°C, then keep it at this temperature for 2.0h, and after cooling, grind it to obtain a green pigment, which is UV-visible -Detected by near-infrared spectrophotometer, the average sunlight reflectance of the pigment is 53.94%, which is higher than the 38% of the green infrared reflective pigment reported in the research (Zheng Gongshao. Infrared reflective pigment and its application [J]. Shanghai Paint. 2008 , 46(12):19-23).

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Abstract

The invention relates to a sodium-zinc-phosphate-based pigment with a high sunlight reflective property, and a preparation method thereof. According to the invention, a component A which is zinc oxide, a component B which is sodium phosphate or sodium tripolyphosphate, and a component C which is a metal oxide or a metal salt are weighed according to a certain ratio; the three samples are mixed according to the ratio, and the samples are grinded; the obtained mixture is processed through high-temperature calcining; the temperature of the obtained mixture is maintained for a certain period of time, and the mixture is cooled; the mixture is grinded, such that a finished product is obtained. With the method provided by the invention, the prepared sodium-zinc-phosphate-based pigment has a highsunlight reflectivity. The method is also advantaged in simple technology and low pigment calcining temperature. The method is energy saving.

Description

technical field [0001] The invention relates to the field of pigment preparation, in particular to a sodium zinc phosphate-based pigment with high solar reflection performance and a preparation method thereof. Background technique [0002] In sunlight, the wavelength band that makes objects heat is concentrated in the infrared part, and 95% of the energy in the infrared part is concentrated in the near-infrared part. The study of pigments with near-infrared infrared reflection has important application significance. Infrared reflective pigments refer to pigments that exhibit a certain color in visible light and reflect infrared light in the infrared region. At present, infrared reflective pigments are divided into organic infrared reflective pigments, inorganic infrared reflective pigments, and organic-inorganic composite pigments. Infrared reflective inorganic pigments are mixed with metal oxides, nitrates, acetates, or oxides and then calcined and reacted at a high tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/45
Inventor 苏达根付文祥钟明峰
Owner SOUTH CHINA UNIV OF TECH
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