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A kind of preparation method of silica microsphere-titanium dioxide composite powder pigment

A silicon dioxide and titanium dioxide technology, which is applied in chemical instruments and methods, inorganic pigment treatment, dyed polymer organic compound treatment, etc. Good dispersion, clean production process, no environmental pollution

Active Publication Date: 2020-06-09
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of difficult pulverization and refinement, weak surface activity and hydrolytic coating of titanium oxysulfate or titanium tetrachloride in the preparation method of the existing composite powder pigment with quartz as the core matrix. The wastewater discharge and environmental pollution problems in the preparation of composite powder pigments

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  • A kind of preparation method of silica microsphere-titanium dioxide composite powder pigment

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Embodiment 1

[0029] 1. Selection of raw materials:

[0030] The silica fume, the by-product of the fused zirconia production process, is the silica microsphere powder as the matrix, and its chemical composition is silica as an amorphous phase. The mass percentage of balls is 40%, the mass percentage of microspheres with a diameter of 0.5-2μm is 60%; the industrial grade metatitanic acid is used as the titanium dioxide precursor, the mass percentage of titanium dioxide in the industrial grade metatitanic acid is 55%, the water mass percentage is 43%, and the volatile matter The mass percentage of sulfur dioxide is 2%; with the polyethylene glycol of model being PEG6000 and the industrial grade sodium polyacrylate of 30% solid mass percentage as a dispersant, sodium hydroxide as an alkali treatment agent, and dilute sulfuric acid as a pH regulator;

[0031] 2. Raw material ratio and preparation process steps:

[0032] (1) Preparation of silica microsphere powder-water suspension

[0033] T...

Embodiment 2

[0047] 1. Selection of raw materials:

[0048] The silica fume, the by-product of the production process of fused zirconia, is used as the matrix, and its chemical composition is silica as an amorphous phase. The diameter of the microsphere is 0.5-3 μm, and the diameter of the microsphere is 2-3 μm. The mass percentage is 40%, the mass percentage of 0.5-2μm microspheres is 60%; the industrial grade metatitanic acid is used as the titanium dioxide precursor, the mass percentage of titanium dioxide in the metatitanic acid is 55%, the water mass percentage is 43%, and the volatile sulfur dioxide 2% by mass; the model is PEG6000 polyethylene glycol and 30% solid mass percent of industrial grade sodium polyacrylate as a dispersant, sodium hydroxide as an alkali treatment agent, and dilute sulfuric acid as a pH regulator;

[0049] 2. Raw material ratio and preparation process steps:

[0050] (1) Preparation of silica microsphere powder-water suspension

[0051] The raw materials a...

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Abstract

The invention provides a preparation method of SiO2 microsphere-TiO2 composite powder pigment. According to the preparation method, for selection of raw materials, a byproduct silica fume obtained ina production process of electric-fused zirconia is taken as a substrate, industrial metatitanic acid is taken as a TiO2 precursor, polyethylene glycol and sodium polyacrylate are taken as dispersants,sodium hydroxide is taken as an alkaline treating agent, and dilute sulfuric acid is taken as a pH regulator. SiO2 microspheres and metatitanic acid as the raw materials have high reactivity; the composite powder pigment prepared with the method is tightly cladded with TiO2, TiO2 and SiO2 are firmly bonded and are high in covering power, a scattering area of TiO2 is large, performance exertion ofthe pigment is facilitated, and meanwhile, the problem of washing, impurity removal and wastewater pollution produced in an existing chemical precipitation cladding method are solved.

Description

technical field [0001] The invention relates to the technical field of production of inorganic composite powder pigments, in particular to a composite powder pigment prepared by compounding micron-scale silica microspheres and submicron-scale titanium dioxide particles, that is, silica microspheres. A preparation method of ball-titanium dioxide composite powder pigment. Background technique [0002] Pigment is a powder material composed of solid microparticles with a high refractive index. Adding it to coatings, plastics, inks and other products can endow the product with opacity, hiding, gloss and color matching effects, and affect its UV aging resistance. , of which the white pigment is the most important. Titanium dioxide is a sub-micron powder material composed of crystalline titanium dioxide particles with a particle size of 0.2-0.3 μm. It is currently recognized as the white pigment with the best performance, the widest application range and the largest dosage. The a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C1/28C09C3/06C09C3/10
CPCC09C1/0087C09C1/28C09C1/3653C09C1/3661C09C1/3676C09C3/006C09C3/063C09C3/10
Inventor 孙思佳丁浩
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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