Titanium dioxide for decorative paper and preparation method

A technology for titanium dioxide and decorative paper, applied in the field of titanium dioxide, can solve the problems of low papermaking retention rate, low isoelectric point, affecting product color, etc.

Active Publication Date: 2020-06-26
HENAN BILLIONS NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Publication No. CN108929574A discloses a method for manufacturing titanium dioxide for decorative paper. Its inner layer is a cerium oxide film layer, followed by zirconia, and the outermost layer is an aluminum oxide layer. This invention involves cerium oxide, which affects the hue of the product
Publication No. CN108587246A discloses a method in which the by-products of the chlorination process are used for titanium dioxide inorganic coating, and titanium dioxide with light resistance close to that of the finished product of cerium salt is obtained, but its isoelectric point is low, resulting in low retention rate of papermaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The abrasive slurry is imported into the coating tank, and the control slurry concentration is 350g / L (in the form of TiO 2 At the same time, the temperature was raised to 80°C; 2.8% of the mass fraction of titanium dioxide in the slurry was added within 60 minutes. 4 P 2 o 7 solution, 0.8% TiOCl 2 Solution and 0.6% sodium aluminate solution, control pH=4.5~5.5, homogenize for 30min; adjust the pH=9.5 of the slurry with dilute NaOH solution, adjust for 30min, homogenize for 30min; add titanium dioxide mass fraction in the slurry within 120min 2.5% NaAlO 2 solution, 1.0% MgSO 4 solution and H 2 SO 4 Solution, maintain co-current pH = 9.5, homogenize for 30min; use dilute H 2 SO 4 Adjust pH=7.0, adjust for 30 minutes, homogenize for 120 minutes; wash with water, flash evaporate, steam powder to obtain the product.

Embodiment 2

[0050] The abrasive slurry is imported into the coating tank, and the control slurry concentration is 350g / L (in the form of TiO 2 At the same time, the temperature was raised to 80°C; 2.0% of the mass fraction of titanium dioxide in the slurry was added within 60 minutes. 4 P 2 o 7 solution, 0.6% TiOCl 2 Solution and 0.4% sodium aluminate solution, control pH=4.5~5.5, homogenize for 30min; adjust the pH=9.5 of the slurry with dilute NaOH solution, adjust for 30min, homogenize for 30min; add titanium dioxide mass fraction in the slurry within 100min 3.0% NaAlO 2 solution, 0.8% MgSO 4 solution and H 2 SO 4 Solution, maintain co-current pH = 9.5, homogenize for 30min; use dilute H 2 SO 4 Adjust pH=7.0, adjust for 30 minutes, and homogenize for 120 minutes; wash with water, flash steam, and steam powder to obtain the product, and the others are the same as in Example 1.

Embodiment 3

[0052] The abrasive slurry is imported into the coating tank, and the control slurry concentration is 350g / L (in the form of TiO 2 At the same time, the temperature was raised to 80°C; 1.2% of the mass fraction of titanium dioxide in the slurry was added within 60 minutes. 2 HPO 4 solution (in P 2 o 5 meter, solution concentration is 90g / L), 0.4% TiOCl 2 solution (with TiO 2 meter, solution concentration 120g / L) and 0.23% sodium aluminate solution (as Al 2 o 3 solution concentration 140g / L), control pH=4.5~5.5, homogenize for 30min; use dilute NaOH solution (solution concentration 240g / L) to adjust the pH of the slurry=9.5, adjust for 30min, homogenize for 30min; The mass fraction of titanium dioxide in the slurry is 3.5% NaAlO 2 solution (as Al 2 o 3 meter, solution concentration 140g / L), 0.5% MgSO 4 Solution (as MgO, solution concentration 140g / L) and dilute H 2 SO 4 Solution (solution concentration 240g / L), maintain co-current pH=9.5, homogenize for 30min; use d...

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Abstract

The invention discloses titanium dioxide for decorative paper and a preparation method. The titanium dioxide comprises a titanium dioxide base material and a coating layer located on the surface of the titanium dioxide base material, and the coating layer sequentially comprises a titanium phosphate and aluminum phosphate mixed coating layer and a magnesium oxide and aluminum oxide mixed coating layer from the inside out. According to the titanium dioxide for decorative paper provided by the invention, a titanium phosphate and aluminum phosphate mixed film layer is coated on the surface of titanium dioxide, the hue of the titanium dioxide can be improved, the coating process of the titanium dioxide can be reduced, and the cost is reduced, and then an aluminum oxide and magnesium oxide mixedfilm layer is coated to improve the isoelectric point of the titanium dioxide, so that the titanium dioxide is positively charged in a papermaking system and can be better combined with negatively charged cellulose, the retention rate of the titanium dioxide in paper is improved, and then the covering power of the titanium dioxide is further improved. The invention further provides a preparationmethod of the titanium dioxide by taking the technical scheme as a starting point.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide, and in particular relates to a titanium dioxide for decorative paper and a preparation method. Background technique [0002] Titanium dioxide, also known as titanium dioxide, is considered to be the best white pigment in the world due to its excellent optical properties, and is widely used in coatings, plastics, papermaking, ink, chemical fiber and other fields. In the field of papermaking, decorative paper is the one that uses the most titanium dioxide, and the amount of titanium dioxide used can reach 45%. Titanium dioxide for decorative paper should have good hiding power, weather resistance (anti-chalking ability), color fastness, and water dispersibility, so as to ensure that the decorative paper has excellent performance. However, there are some photoactivation points on the surface of titanium dioxide powder particles. When exposed to sunlight (mainly in the near-ultraviolet spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06D21H17/69
CPCC09C1/3661C09C3/063D21H17/69
Inventor 陈建立王莉萍王永珊周文静冯亚阳曹青喜
Owner HENAN BILLIONS NEW MATERIAL CO LTD
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