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Preparation method of titanium dioxide for printing ink

A technology of titanium dioxide and ink, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of titanium dioxide whiteness, limited application, poor weather resistance, etc., and achieve excellent particle size distribution, low wear and heat resistance good sex effect

Inactive Publication Date: 2015-04-01
NINGBO XINFU TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impurity sulfur content in the finished titanium dioxide is extremely high, which cannot be removed during the washing process, and the colored impurity elements have a great influence on the whiteness of titanium dioxide and have defects such as easy yellowing, poor weather resistance, and poor heat resistance, which have great limitations. its application in ink

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1, the metatitanic acid press filter cake treated with KP reagent and Al salt was calcined above 900°C to obtain crude titanium dioxide with a rutile content ≥ 99.5%, and TiO2 slurry was obtained after crushing, wetting and wet grinding 1000mL of TiO2 slurry after wet grinding was taken, added desalted water to dilute the TiO2 concentration to 400g / L, adjusted pH=12 with NaOH, and added 0.1% sodium hexametaphosphate. Steam was introduced to raise the temperature to 70°C, and 0.2% sodium metaaluminate was added while stirring for 10 minutes, then H2SO4 solution was added within 60 minutes to adjust and maintain pH = 8, and then left to mature for 30 minutes. Then filter and wash to make the resistivity of the filter cake ≥ 100Ω·M, then dry at 120°C for 120min, and heat-treat at 800°C for 30min. Finally, during steam milling, dodecyltriethoxysilane was added and the carbon content on the titanium dioxide particles was measured to be 0.2%. The prepared titanium di...

Embodiment 2

[0014] Example 2, the metatitanic acid press filter cake treated with KP reagent and Al salt was calcined above 900°C to obtain crude titanium dioxide with a rutile content ≥ 99.5%, and TiO2 slurry was obtained after crushing, wetting and wet grinding 1000mL of TiO2 slurry after wet grinding was taken, added desalted water to dilute the TiO2 concentration to 450g / L, adjusted pH=8 with NaOH, and added 0.2% sodium hexametaphosphate. Steam was introduced to raise the temperature to 30°C, and 1% aluminum sulfate was added while stirring for 5 minutes, then H2SO4 solution was added within 180 minutes to adjust and maintain pH = 4, and then left to mature for 10 minutes. Then filter and wash to make the resistivity of the filter cake ≥ 100Ω·M, then dry at 160°C for 60min, and heat-treat at 300°C for 2h. Finally, during steam milling, dodecyltriethoxysilane was added, and the carbon content on the titanium dioxide particles was measured to be 0.5%. The prepared titanium dioxide was ...

Embodiment 3

[0015] Example 3, the metatitanic acid press filter cake treated with KP reagent and Al salt was calcined above 900°C to obtain crude titanium dioxide with rutile content ≥ 99.5%, and TiO2 slurry was obtained after crushing, wetting and wet grinding , take wet milled TiO2 slurry 1000mL, add an appropriate amount of desalted water to dilute the TiO2 concentration to 420g / L, adjust the pH to 11 with NaOH, feed steam to raise the temperature to 70°C, add 0.8% aluminum chloride while stirring, and add The time is 15 minutes, then add H2SO4 solution within 120 minutes to adjust and maintain PH = 6, and then stand and mature for 20 minutes. Then filter and wash to make the resistivity of the filter cake ≥ 100Ω·M, then dry at 140°C for 90min, and heat-treat at 500°C for 1h. Finally, during steam milling, dodecyltriethoxysilane was added and the carbon content on the titanium dioxide particles was measured to be 1%. The prepared titanium dioxide was used in water-based ink, and the g...

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Abstract

The invention discloses a preparation method of titanium dioxide for printing ink. The preparation method comprises the following steps of a, calcining metatitanic acid squeezed filter cake subjected to treatment at a temperature of more than 900 DEG C to obtain a titanium dioxide crude product, and preparing TiO2 slurry, b, feeding steam into the TiO2 slurry, and adding an aluminum-containing compound into the TiO2 slurry, c, adjusting slurry pH to 4-8 and keeping the pH, d, carrying out curing for 10-30min, e, carrying out filtration to remove soluble salt, carrying out drying and carrying out heat treatment, and f, carrying out air-flow crushing and simultaneously, adding an organic surface conditioning agent into the titanium dioxide to obtain a finished product. Compared with the prior art, the titanium dioxide obtained by the preparation method does not yellow easily, has good weatherability and heat resistance, and has high luster, high tinting strength, high masking performances, low wear resistance, excellent dispersibility and excellent granule size distribution in a solvent system and an aqueous system.

Description

technical field [0001] The invention belongs to the field of chemical production, in particular to a preparation method of titanium dioxide for ink. Background technique [0002] As people's awareness of environmental protection increases, more and more packaging uses flexographic printing. The inks used in flexographic printing include solvent-based inks and water-based inks. Among them, water-based inks are widely welcomed because the solvent used is water, no organic solvents or less dosage, and low organic volatile VOC content. [0003] For white inks, titanium dioxide is the most important and widely used white pigment, accounting for 80% of all white pigments used. Reasonable selection of titanium dioxide is the key to making high-quality white inks. Therefore, according to the specific characteristics and requirements of the ink, the performance of the environment-friendly water-based ink special titanium dioxide has the following characteristics: ①Good whiteness, du...

Claims

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Application Information

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IPC IPC(8): C01G23/08
Inventor 陆祥芳陈跃晏育刚邵国雄吴婷婷
Owner NINGBO XINFU TITANIUM DIOXIDE
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