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Titanium oxide black pigment and preparation method thereof

A titanium oxide, black pigment technology

Active Publication Date: 2021-09-07
GUANGDONG HINNO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface coating layer of this technology is SiO 2 , the prepared modified titanium oxynitride still has a strong absorption of ultraviolet light and visible light, which will reduce the service life of the material, and the insulation performance needs to be further improved

Method used

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  • Titanium oxide black pigment and preparation method thereof
  • Titanium oxide black pigment and preparation method thereof

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preparation example Construction

[0015] A preparation method of titanium oxide black pigment, comprising the steps of:

[0016] The titania nuclei are wet-milled, and Al is coated on the titania nuclei after wet milling by a sol-gel method. 2 o 3 film and SiO 2 membrane;

[0017] Coating the Al by sol-gel method 2 o 3 For film, the heating rate of calcination is 2°C / min~7°C / min, the temperature of constant temperature calcination is 350°C~800°C, and the time is 1h~10h;

[0018] Coating the SiO with the sol-gel method 2 For the film, the heating rate of calcination is 2°C / min to 7°C / min, the temperature of constant temperature calcination is 100°C to 600°C, and the time is 1h to 10h.

[0019] The process conditions of the sol-gel method are easy to control, and can be operated at lower temperatures and milder conditions. The content of various components can be precisely controlled and uniformly mixed at the molecular level, thereby effectively controlling the particle size and morphology. and nature. ...

Embodiment 1

[0047] This embodiment provides a black titanium oxide pigment and a preparation method thereof.

[0048] Use the sol-gel method in the following sequence:

[0049] (1) Dispersion of nuclei: use 50 parts by mass of Ti with a particle size of 35nm to 91nm 2 o 3 and 50 mass parts Ti 3 o 5 As titanium oxide nuclei, ethanol was added to the nuclei and subjected to wet grinding to obtain intermediate I.

[0050] (2) Coating Al 2 o 3 Membrane: uniformly mix intermediate I with aluminum isopropoxide, ethanol, and deionized water, add hydrochloric acid and / or ammonia water, control the pH to 5-6, react for 1 hour, heat to 90°C and dry at constant temperature for 3 hours. Heating to 600°C at a heating rate of 5°C / min in the atmosphere, and calcination at a constant temperature for 8 hours to obtain intermediate II;

[0051] Wherein, the molar ratio of aluminum isopropoxide to deionized water is 1:50.

[0052] (3) coated SiO 2 Membrane: Mix intermediate II with tetraethyl ortho...

Embodiment 2

[0056] This embodiment provides a black titanium oxide pigment and a preparation method thereof.

[0057] Use the sol-gel method in the following sequence:

[0058] (1) Dispersion of nuclei: use 50 parts by mass of Ti with a particle size ranging from 87nm to 137nm 2 o 3 and 50 mass parts Ti 3 o 5 As the titania nuclei, deionized water was added to the nuclei for wet grinding to obtain intermediate I.

[0059] (2) Coating Al 2 o 3 Membrane: uniformly mix intermediate I with aluminum isopropoxide, ethanol, and deionized water, add hydrochloric acid and / or ammonia water, control the pH to 8-9, react for 3 hours, heat to 80°C and dry at constant temperature for 6 hours, then Heating to 600°C at a heating rate of 5°C / min in the atmosphere, and calcination at a constant temperature for 8 hours to obtain intermediate II;

[0060] Wherein, the molar ratio of aluminum isopropoxide to deionized water is 1:50.

[0061] (3) coated SiO 2 Membrane: Mix intermediate II with tetraet...

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Abstract

The invention relates to a titanium oxide black pigment and a preparation method thereof. Through: Wet milling TiO2 nuclei and coating Al on the TiO2 nuclei after wet milling by sol-gel method 2 o 3 film and SiO 2 film to obtain a titanium oxide black pigment containing two coating layers. Coated Al 2 o 3 For the film, the heating rate of the calcination is controlled to be 2°C / min to 7°C / min, the temperature of the constant temperature calcination is 350°C to 800°C, and the time is 1h to 10h; coated SiO 2 For the film, the heating rate of the calcination is controlled to be 2°C / min to 7°C / min, the temperature of the constant temperature calcination is 100°C to 600°C, and the time is 1h to 10h; by forming dense Al 2 o 3 film and SiO 2 film, endow titanium oxide black pigment with excellent insulation, and reduce the exposure of oxygen defects and photoactive groups on the surface, effectively block the contact between titanium oxide nuclei and organic matter, and synergistically improve the photostability of titanium oxide black pigment, Achieve the effect of prolonging the service life.

Description

technical field [0001] The invention relates to the field of pigments, in particular to a titanium oxide black pigment and a preparation method thereof. Background technique [0002] Titanium oxide (chemical formula: Ti n o 2n-1 ) is a kind of black oxide, which has the advantages of high hiding power similar to titanium dioxide pigment, good thermal stability, easy dispersion in aqueous phase and organic phase, environmental protection and non-toxicity, etc., and is suitable for coloring. However, titanium suboxide contains low-valent titanium oxide, and there are lattice defects of oxygen. Its conductivity is generally greater than 1S / cm, which limits its application in the field of insulation; and titanium suboxide is in the ultraviolet and visible light bands, especially in the range of 300nm to 600nm. It has high absorption intensity and strong photocatalytic activity. When used in combination with organic matter, photocatalytic decomposition reaction will occur, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/62C09C3/06C09C3/04
CPCC09C1/622C09C3/006C09C3/043C09C3/063
Inventor 张新权郭永军陈建雄朱扬杰黄荣暖
Owner GUANGDONG HINNO TECH CO LTD