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Preparation method for high-light fastness titanium dioxide pigment

A technology of titanium dioxide and light resistance, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of the light resistance of titanium dioxide pigments, increased energy consumption, and increased production costs of titanium dioxide pigments. Transparency, light fastness improvement, high opacity effect

Active Publication Date: 2012-07-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical scheme improves the retention and opacity of titanium dioxide pigments, the light resistance of titanium dioxide pigments still needs to be improved
[0007] U.S. Patent No. 12192790 discloses a method for manufacturing titanium dioxide for decorative paper. It coats dense aluminum phosphate compounds on the surface of titanium dioxide, and after coating, high-temperature treatment improves the graying resistance of titanium dioxide pigments. Graying resistance is improved, but high temperature treatment increases energy consumption, leading to increased production costs of titanium dioxide pigments

Method used

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  • Preparation method for high-light fastness titanium dioxide pigment
  • Preparation method for high-light fastness titanium dioxide pigment
  • Preparation method for high-light fastness titanium dioxide pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] With deionized water, 1000g of titanium dioxide primary product (anatase titanium dioxide produced by sulfuric acid method, Ningbo Xinfu Titanium Dioxide Co., Ltd.) is prepared into a slurry containing a concentration of 320g / L of titanium dioxide primary product, and sodium hexametaphosphate is added Add 0.05L of sodium hexametaphosphate aqueous solution with a mass concentration of 70g / L, add sodium hydroxide aqueous solution with a mass percentage of 20% sodium hydroxide to adjust the pH to 8, and then pass the slurry into a sand mill for sand grinding. The final slurry is filtered through a sieve to remove coarse particles to obtain an aqueous suspension of the primary product of titanium dioxide.

[0039] Add the aqueous suspension of the primary titanium dioxide product into the coating tank while stirring and raising the temperature to 40°C, and keep this temperature until the coating of aluminum hydroxide is completed. Start to pack dense silicon dioxide, drop r...

Embodiment 2

[0044] With deionized water, 1000g titanium dioxide primary product (rutile type titanium dioxide produced by the sulfuric acid process, Ningbo Xinfu Titanium Dioxide Co., Ltd.) is formulated into a slurry containing a titanium dioxide primary product concentration of 280g / L, adding sodium silicate with a mass concentration of 0.03L of 100g / L sodium silicate aqueous solution, add sodium hydroxide aqueous solution containing 10% sodium hydroxide mass percentage to adjust the pH to 9, then pass the slurry into the sand mill for sand grinding, and the slurry after sand grinding Coarse particles are filtered through a sieve to obtain an aqueous suspension of the primary titanium dioxide.

[0045] Add the aqueous suspension of primary titanium dioxide into the coating tank while stirring and raising the temperature to 55°C, and keep this temperature until the coating of aluminum hydroxide is completed. Start to pack dense silicon dioxide, drop relative titania initial product addit...

Embodiment 3

[0050] With deionized water, 1000g of titanium dioxide primary product (anatase titanium dioxide produced by sulfuric acid method, Ningbo Xinfu Titanium Dioxide Co., Ltd.) is prepared into a slurry containing a concentration of 300g / L of titanium dioxide primary product, and the mass concentration of sodium silicate is added. 0.03L of 100g / L sodium silicate aqueous solution, add sodium hydroxide aqueous solution containing 10% sodium hydroxide mass percentage to adjust the pH to 10, then pass the slurry into the sand mill for sand grinding, and the slurry after sand grinding The material is filtered through a sieve to remove coarse particles to obtain an aqueous suspension of the primary product of titanium dioxide.

[0051] Add the aqueous suspension of primary titanium dioxide into the coating tank while stirring and raising the temperature to 70°C, and keep this temperature until the coating of aluminum hydroxide is completed. Adding mass percent in coating tank is the sulf...

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Abstract

The invention discloses a preparation method for a high-light fastness titanium dioxide pigment. The preparation method comprises the following steps of: preparing aqueous suspension of a titanium dioxide initial product; depositing a layer of dense silicon dioxide cladding layer on a titanium dioxide pigment; depositing an aluminum phosphate compound on the silicon dioxide-coated titanium dioxide pigment; depositing aluminum hydroxide by using a parallel-flow method; after the aluminum hydroxide is coated, stirring and aging; and filtering, washing, drying, and performing fluid energy milling and organic treatment to obtain the high-light fastness titanium dioxide pigment. The method provided by the invention has the advantages of high controllability, reproducibility, high operability and the like, facilitates industrial production and has a good application prospect. The titanium dioxide pigment prepared by the method has the advantages of high light fastness, high light resistance, high non-transparency, high color-change resistance and the like, and can be used in decoration paper, laminated paper and coating and plastic products which have high requirements on the light resistance.

Description

technical field [0001] The invention relates to the field of preparation of titanium dioxide pigments, in particular to a preparation method of high light resistance titanium dioxide pigments. Background technique [0002] Titanium dioxide pigments are widely used in papermaking, ink, coatings, plastics and other fields, and papermaking is one of its most important application fields. In papermaking, decorative paper is the most widely used titanium dioxide, and the average usage amount in decorative paper can reach 27%, up to 45% in white decorative paper. Decorative paper is an integral part of the coating material of decorative thermosetting plastics. It is placed under the surface paper in the product structure, mainly to provide decorative patterns and cover the role of preventing the penetration of the underlying glue. Decorative paper is especially suitable for furniture surface finishing, laminate flooring and interior decoration. This kind of paper requires that th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06D21H17/69
Inventor 孙爱华储成义黄慧华李勇许高杰晏育刚陈跃陆祥芳
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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