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Preparation method of titanium dioxide for color masterbatch

A titanium dioxide and color masterbatch technology, applied in chemical instruments and methods, dyeing physical treatment, dyeing organosilicon compound treatment, etc. The effect of interfacial surface energy

Inactive Publication Date: 2016-03-23
NINGBO XINFU TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention aims to improve the application performance of titanium dioxide through inorganic coating and organic coating treatment, but it does not mention the impact on the rheological properties of high-concentration color masterbatch

Method used

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  • Preparation method of titanium dioxide for color masterbatch

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of titanium dioxide for color masterbatch, including the following steps:

[0029] a. Preparation of TiO 2 Slurry: The titanium solution added with seed crystals is heated and kept under low pressure for hydrolysis to prepare metatitanic acid, and then the metatitanic acid after washing, bleaching and salt treatment is pressed to obtain a filter cake, which is calcined at 900°C or higher to obtain Crude titanium dioxide with a rutile content ≥99.5%, pulverize and add sodium hydroxide to sand mill, adjust the PH value to 8-11, and prepare TiO with a particle size of 2 Slurry

[0030] b. Silicon coating: Dilute the TiO2 slurry obtained in step a to a concentration of 300g / L~450g / L, adjust the pH of the slurry=8~11, add dispersant ammonium dihydrogen phosphate solution, and add the amount to P 2 O 5 The proportion of titanium dioxide is 0.01%, the concentration is 48g / L, the steam is heated to 60℃, the silicon-containing compound sodium silicate is added und...

Embodiment 2

[0035] A preparation method of titanium dioxide for color masterbatch, including the following steps:

[0036] a. Preparation of TiO 2 Slurry: The titanium solution added with seed crystals is heated and kept under low pressure for hydrolysis to prepare metatitanic acid, and then the metatitanic acid after washing, bleaching and salt treatment is pressed to obtain a filter cake, which is calcined at 900°C or higher to obtain Crude titanium dioxide with a rutile content ≥99.5%, pulverize and add sodium silicate sand mill, adjust the PH value to 8-11, prepare TiO with a particle size of 2 Slurry

[0037] b. Silicon coating: Dilute the TiO2 slurry obtained in step a to a concentration of 300g / L~450g / L, adjust the pH of the slurry=8~11, and add a mixed solution of dispersant sodium hexametaphosphate and ammonium dihydrogen phosphate , The addition amount is P 2 O 5 The proportion of the total weight of titanium dioxide is 0.1%, the concentration is 50g / L, the steam is heated to 70℃, an...

Embodiment 3

[0042] A preparation method of titanium dioxide for color masterbatch, including the following steps:

[0043] a. Preparation of TiO 2 Slurry: The titanium solution added with seed crystals is heated and kept under low pressure for hydrolysis to prepare metatitanic acid, and then the metatitanic acid after washing, bleaching and salt treatment is pressed to obtain a filter cake, which is calcined at 900°C or higher to obtain Crude titanium dioxide with rutile content ≥99.5%, pulverized and sanded with a mixture of sodium hydroxide and sodium silicate, adjust the pH to 8-11, to obtain TiO with a particle size of 2 Slurry

[0044] b. Silicon coating: dilute the TiO2 slurry obtained in step a to a concentration of 300g / L~450g / L, adjust the pH of the slurry=8~11, add dispersant sodium hexametaphosphate solution, and add the amount to P 2 O 5 The proportion of the total weight of titanium dioxide is 0.2%, the concentration is 52g / L, the steam is heated to 90℃, the silicon-containing comp...

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Abstract

The invention relates to a preparation method of titanium dioxide for a color masterbatch. The preparation method comprises the following steps: a) preparing TiO2 slurry; b) silicon coating: diluting the TiO2 slurry obtained in step a to 300g / L to 450g / L, regulating pH of the slurry to 8 to 11, adding dispersing agent, feeding steam to heat to 60 to 90 DEG C, adding a silicon-containing compound under agitation, maintaining the pH of the slurry to be 8 to 10 to enable the surfaces of TiO2 particles to be coated with silicon oxide layers; c) aluminum coating: adding an aluminum oxide compound into the slurry obtained in step b, performing hydrolysis to form water-containing aluminum oxide layers on the surfaces of the silicon oxide layers, and maintaining the pH of the slurry to be 4 to 10 and temperature to be 40 to 60 DEG C; d) drying; e) crushing. The whiteness of the titanium dioxide obtained by adopting the preparation method provided by the invention is high, the dispersity is good, the newly formed interfacial surface energy is reduced through coating treatment, the titanium dioxide is prevented from being coagulated again during processing of the color masterbatch, especially high-concentration masterbatch, and thus not only can the amount of the used titanium dioxide be reduced, but also the rheological property of the color masterbatch can be improved.

Description

Technical field [0001] The invention belongs to the field of chemical production, and specifically relates to a preparation method of titanium dioxide for high-concentration masterbatch. Background technique [0002] Colorants play a key role in the coloring of plastics. Masterbatch coloring is the most commonly used plastic coloring method. Color masterbatch is used to color plastics and has been widely used in plastic processing industry, cable processing, synthetic fiber processing and other industries. Compared with the traditional float dyeing method, it has the advantages of uniform dispersion, low cost, simple operation, etc. Its composition is mainly composed of three parts: pigment, dispersant and carrier. [0003] The plastics industry is the second largest user of titanium dioxide. As the best white inorganic pigment used in plastics, titanium dioxide can not only provide whiteness, gloss and hiding power for plastics, but also improve the light resistance, heat resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/08C09C3/12
CPCC09C1/36C01P2006/22C01P2006/60C09C1/3615C09C1/363C09C1/3661C09C1/3669C09C1/3684C09C1/3692
Inventor 陆祥芳陈跃晏育刚邵国雄李古鹏吴婷婷
Owner NINGBO XINFU TITANIUM DIOXIDE
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