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Dispersion of rutile titanium oxide particles, method for producing same and use of same

A rutile type, titanium oxide technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as inability to improve crystallinity, achieve effective UV shielding, excellent dispersion stability, and high refraction rate effect

Active Publication Date: 2012-01-18
SAKAI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It has been known that the crystallinity of rutile-type titanium oxide can be improved by firing. However, if fired, the particles grow at the same time, and the crystallinity cannot be improved in the state of fine particles.

Method used

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  • Dispersion of rutile titanium oxide particles, method for producing same and use of same
  • Dispersion of rutile titanium oxide particles, method for producing same and use of same
  • Dispersion of rutile titanium oxide particles, method for producing same and use of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Step 1

[0069] The aqueous solution of titanium tetrachloride was diluted with water and adjusted so that it was 200 g / L as titanium oxide and the chloride ion concentration was 8.3 mol / L. 1 L of the titanium tetrachloride aqueous solution was charged into a separable flask equipped with a reflux device, heated at the boiling point (110° C.) for 2 hours, and hydrolyzed to obtain a slurry containing precipitated rutile-type titanium oxide particles.

[0070] Step 2

[0071]The slurry was filtered using a glass fiber filter paper with a collection diameter of 300 nm to remove unreacted titanium tetrachloride and dissolved components. The rutile-type titanium oxide particles thus obtained were made into a slurry in water, and an aqueous sodium hydroxide solution was added to the obtained slurry until the slurry had a pH of 7.0, and then filtered using a glass fiber filter paper with a collection diameter of 300 nm. At this time, the rutile-type titanium oxide was slurri...

Embodiment 2

[0082] In the fifth step of Example 1, a dispersion of rutile-type titanium oxide particles was obtained in the same manner as in Example 1 except that hydrochloric acid was used instead of nitric acid for deflocculation.

Embodiment 3

[0084] In the third step of Example 1, a dispersion of rutile-type titanium oxide particles was obtained in the same manner as in Example 1 except that 90 mol parts of acetic acid was added to 100 mol parts of titanium oxide.

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Abstract

Disclosed is a dispersion of rutile titanium oxide particles, wherein the D50 of the particle size distribution of the rutile titanium oxide particles is within the range of 1-15 nm and the D90 thereof is not more than 40 nm as measured by dynamic light scattering, the specific surface area of the rutile titanium oxide particles as determined by a BET method is within the range of 120-180 m2 / g, and the weight reduction rate is not more than 5% when the rutile titanium oxide particles are heated from 105 DEG C to 900 DEG C. The dispersion of rutile titanium oxide particles can be obtained by a method which comprises: a first step wherein an aqueous titanium tetrachloride solution is thermally hydrolyzed, thereby obtaining a slurry that contains deposited rutile titanium oxide particles; a second step wherein the slurry obtained in the first step is filtrated and washed with water, thereby removing water-soluble salts dissolved therein; a third step wherein the slurry obtained in the second step is subjected to a hydrothermal reaction in the presence of an organic acid; a fourth step wherein the slurry obtained in the third step is filtrated and washed with water; a fifth step wherein an acid is added to the slurry obtained in the fourth step and a wet dispersion process is performed, thereby obtaining a dispersion; and a sixth step wherein the excess acid and water-soluble salts are removed from the dispersion obtained in the fifth step.

Description

technical field [0001] The invention relates to a dispersion of rutile-type titanium oxide particles, a preparation method thereof and an application thereof, especially for a resin composition. Background technique [0002] A method for preparing a dispersion of rutile-type titanium oxide particles is conventionally known. The most common method is to hydrolyze the titanium salt to obtain a titanium hydroxide-containing slurry, and to deflocculate the slurry with an acid or base to obtain a dispersion. However, since the titanium oxide particles in the dispersion of rutile-type titanium oxide particles obtained by such a conventionally known method have a D90 of 40 nm or more, they cannot be used for resin moldings requiring high transparency and coatings for hard coats. applications such as dressings. [0003] Therefore, various methods for preparing a dispersion of fine rutile-type titanium oxide particles have been proposed in recent years. For example, it has been pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C08L101/00C09C1/36C09D17/00B01J13/00C08K3/22
CPCB82Y30/00C01P2004/64C01P2006/12C01P2002/72C01G23/0536C01P2006/37C01G23/053C09D17/008Y10T428/2982B01J13/00C08K3/22C09C1/36
Inventor 野村笃史中川健一森田考则
Owner SAKAI CHEM IND CO LTD
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