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Compound modified titanium and preparation method thereof

A composite modification and titanium dioxide technology, which is applied in chemical instruments and methods, dyeing low molecular organic compound treatment, fibrous fillers, etc., can solve the problems of weak binding force and difficult dispersion of modified titanium dioxide, and achieve high binding force , Improve gloss, improve the effect of dispersion

Active Publication Date: 2010-03-31
江苏中来新材科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, stearic acid and hydroxybenzoic acid or o-hydroxybenzoic acid are dispersed in an organic solvent in the organic coating method, and stearic acid and hydroxybenzoic acid or o-hydroxybenzoic acid and TiO 2 It is difficult to combine the particles with chemical bonds, the binding force is weak, and the obtained modified titanium dioxide is difficult to disperse in the oily system

Method used

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Examples

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preparation example Construction

[0021] The present invention also provides a preparation method of composite modified titanium dioxide, comprising the following steps:

[0022] (a) beating and dispersing: dispersing titanium dioxide in water to form the first slurry;

[0023] (b) Inorganic coating: add at least one of the raw materials for preparing silica and alumina to the first slurry, stir evenly, then add the raw materials for preparing zirconium dioxide, stir evenly, and obtain the titanium dioxide surface-coated inorganic The second slurry of film layer;

[0024] (c) Organic coating: under stirring state, add organic coating solution to the second slurry to obtain the third slurry;

[0025] (d) The third slurry is washed, dried and pulverized to obtain composite modified titanium dioxide.

[0026] According to the preparation method provided by the present invention, the titanium dioxide is dispersed in water, stirred evenly, and ground to form a first slurry with a solid content of 35-40%. The tit...

Embodiment 1

[0052] This example is used to illustrate the composite modified titanium dioxide provided by the present invention and its preparation method.

[0053] (1) Solution preparation:

[0054] Sodium hexametaphosphate solution: weigh 10g sodium hexametaphosphate and dissolve in 200mL deionized water;

[0055] Oxalic acid solution: weigh 10g oxalic acid and dissolve in 200ml deionized water;

[0056] dilute H 2 SO 4 Solution: Measure 9ml concentration of 98% H 2 SO 4 Add deionized water to dilute to 1L;

[0057] Na 2 SiO 3 Solution: weigh 30g Na 2 SiO 3 Dissolve in 1L deionized water.

[0058] (2) Beating and dispersion:

[0059] Weigh 1000g of rutile titanium dioxide powder and place it in a 2.5L stainless steel stirrer. Under stirring, add 2500mL of deionized water at 80°C, and then add the sodium hexametaphosphate solution configured in step (1) to obtain a mixture. Put the mixture into a mixing and dispersing tank for stirring and dispersing, move it to a sand mill (...

Embodiment 2

[0074] This example is used to illustrate the composite modified titanium dioxide provided by the present invention and its preparation method.

[0075] Adopt the method identical with embodiment 1 to prepare composite modified titanium dioxide, difference is:

[0076] Inorganic coating: In step (4), Na is added dropwise in parallel 2 SiO 3 and dilute H 2 SO 4 After the solution was stirred at a high speed for 3 h, the Zr(SO 4 ) 2 Solution and NaOH solution, without aluminum oxide coating on the surface of titanium dioxide.

[0077] The same method as in Example 1 was used for organic coating and post-treatment, and the obtained composite modified titanium dioxide was designated as A2.

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Abstract

The invention provides a compound modified titanium and preparation method thereof. The compound modified titanium comprises a kernel and an envelop layer coated on the kernel; wherein the kernel is titanium oxide, the envelop layer is composed of inorganic film coated on the kernel and organic film coated on the inorganic film, the inorganic film has two layers at least, the layer close to the kernel contains at least one of silicon dioxide and aluminium oxide, the layer far away from the kernel is coated outside the layer close to the kernel, and the layer far away from the kernel contains zirconium dioxide. In the preparation method of compound modified titanium provided by the invention, the organic envelop liquid adopts surfactant, coupling agent and water emulsion, so that the binding force of titanium oxide of the organic film after being coated by inorganic envelop is high, and dispersity of titanium in oily system is improved.

Description

【Technical field】 [0001] The invention relates to a composite modified titanium dioxide and a preparation method of the composite modified titanium dioxide, belonging to the field of chemical industry. 【Background technique】 [0002] Titanium dioxide is currently the best white inorganic pigment in the world. It is widely used in architectural outdoor coatings, automotive topcoats, and plastic-steel doors and windows. With the increasing requirements of global environmental protection, the content of organic medium needs to be reduced, so the requirements for the dispersion performance of titanium dioxide in organic medium are higher. At the same time, single-functional titanium dioxide can no longer meet people's requirements for the application performance of titanium dioxide. Therefore, it is very necessary to prepare composite titanium dioxide with high gloss, super weather resistance and high dispersion performance to meet the needs of the titanium dioxide market. of. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08
Inventor 张璐璐许静杨柳林香生
Owner 江苏中来新材科技有限公司
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