Preparation method of high-light-resistant titanium dioxide pigment for laminated paper

A technology of titanium dioxide and laminated paper, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems that cannot meet the light resistance performance requirements of high-end laminated decorative paper, and achieve good average particle size and particle size distribution , Improve the opacity, improve the effect of covering power

Active Publication Date: 2019-05-03
中信钛业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101857736A and CN102585559A have improved the UV light resistance performance of the product, but

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1.1. Weigh 300g of the primary rutile titanium dioxide powder prepared by the chlorination method, add deionized water to prepare a slurry with a concentration of 300g / L, use a pH meter to detect the pH value of the slurry during the entire coating process, and use sodium hydroxide solution Regulate slurry pH to 8.5, add concentration and be 50g / L citric acid solution, wherein the addition of citric acid accounts for TiO 2 0.2% by weight, aging for 20 minutes; 1.2. Heat the ground slurry to 55°C, and maintain this temperature throughout the coating process;

[0029] 1.3. Add 2.0% (in P 2 o 5 accounted for TiO 2 by weight) sodium tripolyphosphate solution, the concentration of sodium tripolyphosphate solution is P 2 o 5 Calculated as 80g / L, at the same time, the concentration is calculated as Al 2 o 3 The aluminum chloride solution calculated at 80g / L maintains the pH value of the slurry at 4.0 and matures for 30 minutes to form a dense aluminum phosphate coating l...

Embodiment 2

[0035] 1.1. Weigh 450g of the primary rutile titanium dioxide powder prepared by the chlorination method, add deionized water to prepare a slurry with a concentration of 450g / L, use a pH meter to detect the pH value of the slurry during the entire coating process, and adjust it with potassium hydroxide solution Slurry pH to 10.5, adding concentration is 80g / L ammonium citrate solution, wherein the addition of ammonium citrate accounts for TiO 2 1.0% by weight, dispersed for 40 minutes;

[0036] 1.2. Heat the ground slurry to 60°C, and maintain this temperature throughout the coating process;

[0037] 1.3. Add 6.0% (in P 2 o 5 accounted for TiO 2 by weight) sodium phosphate solution, the concentration of sodium phosphate solution is P 2 o 5 It is calculated as 100g / L, and the concentration is calculated as Al 2 o 3 The aluminum sulfate solution calculated as 100g / L maintains the pH value of the slurry at 6.0 and matures for 60 minutes to form a dense aluminum phosphate c...

Embodiment 3

[0043] 1.1. Weigh 400g of the primary rutile titanium dioxide powder prepared by the chlorination method, add deionized water to prepare a concentration of 400g / L, use a pH meter to detect the pH value of the slurry during the entire coating process, and adjust the slurry with potassium hydroxide solution pH to 9.5, adding a concentration of 100g / L sodium citrate solution, wherein the amount added to account for TiO 2 0.5% by weight, dispersed for 30 minutes;

[0044] 1.2. Heat the ground slurry to 65°C, and maintain this temperature throughout the coating process;

[0045] 1.3. Add 4.0% (in P 2 o 5 accounted for TiO 2 by weight) sodium hydrogen phosphate solution, the concentration of sodium hydrogen phosphate solution is P 2 o 5 It is calculated as 90g / L, and at the same time, the concentration is determined by Al 2 o 3 The aluminum sulfate solution of 90g / L maintains the pH value of the slurry at 6.5, and matures for 60 minutes to form a dense aluminum phosphate coat...

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PUM

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Abstract

The invention provides a preparation method of a high-light-resistant titanium dioxide pigment for laminated paper. The method comprises the following steps: preparing titanium dioxide slurry from a rutile-type titanium dioxide initial product prepared by adopting a chlorination process method, and adjusting the pH value to 8.5-10.5; adding a citric acid radical-containing organic substance as a dispersing agent, and performing grinding treatment; performing heating to 55-65 DEG C for coating treatment, performing coating by using a dense aluminum phosphate coating layer, performing coating byusing a loose silicon aluminum compound coating layer, and performing coating by using a loose boehmite-type hydrated aluminum oxide coating layer; performing washing by using deionized water until conductivity of a filter cake is greater than 15000 omega*cm, and performing drying; and adding amino-containing organic matter in the steaming powder process, and performing organic coating treatmentto obtain the titanium dioxide pigment for the decorative laminated paper. The method provided by the invention has the advantages that the titanium dioxide pigment prepared by the method has the characteristics of high light performance, good whiteness and a high retention rate in the laminated decorative paper, and the prepared titanium dioxide pigment has a medium color bottom phase and the advantage of easy color matching, and can be widely used in the field of the high-end laminated decorative paper.

Description

technical field [0001] The invention relates to a preparation method of titanium dioxide pigment for high light resistance laminated paper in the field of chemical industry. Background technique [0002] Titanium dioxide, also known as titanium dioxide, has become the most widely used white pigment due to its high refractive index, high color reduction and hiding power, and is known as the "king of white pigments". It is mainly used in industrial production such as papermaking, paint, plastics, rubber, and chemical fibers. Laminated paper, also known as decorative paper, is an essential raw material in building materials. It is mainly used for furniture, flooring and other finishes. It plays a decorative role in providing decorative patterns and a covering function to prevent the glue from seeping out of the bottom layer. This requires the paper to have good hiding power, whiteness and excellent light stability, color brilliance, etc. Titanium dioxide is the most important...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/08C09C3/06D21H17/69
Inventor 于学成姜志刚刘立新王建伟李冬旭许丽岩杨平
Owner 中信钛业股份有限公司
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