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Metal oxide particles containing titanium oxide coated with silicon dioxide-stannic oxide complex oxide

Inactive Publication Date: 2014-07-17
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a coating liquid for forming a transparent coating film on a substrate, which contains titanium oxide particles coated with silicon dioxide-stannic oxide complex oxide colloidal particles. The coating film formed using this coating liquid has excellent weatherability, light stability, chemical resistance, flexibility, and dyeing affinity, and high surface hardness. It also has no change in color or color deterioration when exposed to ultraviolet rays. The refractive index of the coating film can be easily adjusted by changing the mass ratio of the matrix formation component and the metal oxide particles. The coating liquid can be used for various applications such as lenses for glasses and optical devices, display element filters, and looking glass. Additionally, the coating film formed using this coating liquid prevents the reflection of fluorescent light and other display elements, resulting in clear and eyestrain-free images.

Problems solved by technology

On the other hand, the plastic molded articles have practical disadvantages when used for lenses for glasses, window materials, and the like because the plastic molded articles are easily scratched due to insufficient hardness, are easily affected by solvents, are charged to attach dusts, and have insufficient heat resistance.
Such a lens has a refractive index of about 1.50 that is lower than a refractive index of a glass lens of about 1.52, and the lens thus has a disadvantage that a thickness of the edge of the lens is made thick when the lens is used as a lens for nearsightedness.

Method used

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Examples

Experimental program
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examples

[0139]The present invention will be further described in detail with reference to the following examples. The present invention, however, is not limited to the examples

preparation examples

Preparation Example 1

[0140]A water dispersion sol of titanium oxide-containing core particles (A1) was prepared based on Example 2 in Japanese Patent Application Publication No. H10-245224 (JP H10-245224 A).

[0141]Process (a): Into a 3-liter separable flask made of glass with a jacket, 293.8 g (79.8 g in terms of TiO2) of titanium tetrachloride (manufacture by Sumitomo Sitix Co., Ltd., a concentration of 27.2% by mass in terms of TiO2, Cl 32.0% by mass) and 371.6 g of water were poured to prepare 665 g of titanium chloride aqueous solution (12.0% by mass in terms of TiO2). Stirred with a stirring bar made of glass, the aqueous solution was heated to 50° C. and thereafter, 950.8 g of 35% by mass hydrogen peroxide aqueous solution and 566.4 g of metal tin powder (manufactured by Yamaishi Metal Co., Ltd., trade name AT-Sn, No. 200) were added with cooling. The addition of the hydrogen peroxide aqueous solution and the metal tin powder was performed such that first 31.5 g (0.265 mol) of ...

preparation example 2

[0145]A water dispersion sol of titanium oxide-containing core particles (A2) was prepared based on Example 2 in Japanese Patent Application Publication No. H10-310429 (JP H10-310429 A).

[0146]Process (a): Into a 3-liter separable flask made of glass with a jacket, 587.5 g (159.8 g in terms of TiO2) of titanium tetrachloride (27.2% by mass in terms of TiO2, Cl 32.0% by mass, manufacture by Sumitomo Sitix Co., Ltd.), 114.6 g (49.2 g in terms of ZrO2) of zirconium oxycarbonate and (43.0% by mass in terms of ZrO2), manufactured by Daiichi Kigenso Kagaku Kogyo Co., Ltd), and 629.6 g of water were poured to prepare 1331.7 g of a mixed aqueous solution of titanium chloride and zirconium oxychloride (12.0% by mass in terms of TiO2, 3.7% by mass in terms of ZrO2). Stirred with a stirring bar made of glass, the aqueous solution was heated to 60° C., and thereafter, 358.0 g of 35% by mass hydrogen, peroxide aqueous solution and 190.0 g of metal tin powder (manufactured by Yamaishi Metal Co., L...

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Abstract

A metal oxide particle containing titanium oxide coated with silicon dioxide-stannic oxide complex oxide including: a titanium oxide-containing core particle (A); and a coating layer with which the titanium oxide-containing core particle (A) is coated and that is made of silicon dioxide-stannic oxide complex oxide colloidal particles (B) having a mass ratio of silicon dioxide / stannic oxide of 0.1 to 5.0, wherein one or more intermediate thin film layers that are made of any one of an oxide; a complex oxide of at least one element selected from the group consisting of Si, Al, Sn, Zr, Zn, Sb, Nb, Ta, and W; and a mixture of the oxide and the complex oxide are interposed between the titanium oxide-containing core particle (A) and the coating layer made of the silicon dioxide-stannic oxide complex oxide colloidal particles (B).

Description

TECHNICAL FIELD[0001]The present invention relates to a metal oxide particle containing titanium oxide coated with silicon dioxide-stannic oxide complex oxide comprising: a titanium oxide-containing core particle (A); and a coating layer with which the titanium oxide-containing core particle (A) is coated and that is made of silicon dioxide-stannic oxide complex oxide colloidal particles (B) having a mass ratio of silicon dioxide / stannic oxide of 0.1-5.0, in which one or more intermediate thin film layers that are made of any one of an oxide; a complex oxide of at least one element selected from the group consisting of Si, Al, Sn, Zf, Zn, Sb, Nb, Ta, and W; and a mixture of the oxide and the complex oxide are interposed between the titanium oxide-containing core particle (A) and the coating layer made of the silicon dioxide-stannic oxide complex oxide colloidal particles (B). The present Invention also relates to a water dispersion sol, organic solvent dispersion sol, or mixed solve...

Claims

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Application Information

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IPC IPC(8): C09D5/00C09D7/62
CPCC09D5/00C01G23/047C09C1/3661C01P2004/64C01P2004/84C08G18/0866C09D175/04C01G23/053C01P2006/22B82Y30/00C09D7/62C09D7/67Y10T428/31663C01G23/04B05D7/00B32B27/20C09C1/36
Inventor KOYAMA, YOSHINARIFURUKAWA, TOMOKIASADA, MOTOKO
Owner NISSAN CHEM IND LTD