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Photocatalyst Coating Composition

A technology of photocatalyst and composition, applied in the direction of coating, chemical/physical process, physical/chemical process catalyst, etc., to achieve the effect of stable construction, excellent workability, and low temperature dependence of viscosity

Active Publication Date: 2020-07-24
TOTO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the actual situation is that even with these technologies, especially when coating on-site construction on a wide area such as a wall, it is necessary to require higher skills for the builder.

Method used

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  • Photocatalyst Coating Composition
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  • Photocatalyst Coating Composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-11、 and comparative example 1-4

[0093]In Examples 1-11, a prescribed amount of synthetic phyllosilicate as a stabilizer was added to deionized water and sufficiently stirred. In Examples 1-10 synthetic hectorite was used, while in Example 11 synthetic saponite was used. Next, the pre-prepared 1% aqueous solution of methylene blue was gradually added in small amounts. An anatase-type titanium oxide aqueous dispersion was prepared as photocatalyst particles. As inorganic compounds, water-dispersed colloidal silica and zirconia sol were prepared. Thereafter, photocatalyst particles and an inorganic compound were added so that the anatase type titanium oxide aqueous dispersion / water dispersion type colloidal silica / zirconia sol became a predetermined mass ratio. However, in Examples 4 and 9, no inorganic compound was added. Thereafter, a predetermined amount of polysaccharide thickener was added. However, in Examples 4, 5, and 9, no polysaccharide thickener was added. Thereafter, one or two or more selected...

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Abstract

The present invention provides a photocatalyst coating composition that exhibits excellent visibility during construction and can form a homogeneous photocatalyst film with a uniform thickness on the surface of a substrate due to good physical properties. Specifically, it is an alkaline photocatalyst coating composition containing photocatalyst particles, a basic dye, a layered silicate, and a dispersant. The basic dye can improve the visibility of the portion coated with the photocatalyst coating composition, thereby realizing easy identification based on the difference in appearance from the uncoated portion. The basic dye loses its color after being applied due to decomposition by sunlight or decomposition by a photocatalyst. The phyllosilicate suppresses time-dependent discoloration of the basic dye and maintains the color tone stably.

Description

technical field [0001] The present invention is a photocatalyst coating composition, which has excellent workability because of its good visual recognition and physical properties. As a result, a homogeneous photocatalyst film with uniform thickness can be formed on the surface of the substrate. Background technique [0002] Photocatalysts such as titanium oxide have been used in many applications such as building exterior materials in recent years. The photocatalyst excited by light can decompose various harmful substances, so this property can be used to purify the surface of the substrate coated with photocatalyst. In addition, the photocatalyst excited by light makes the surface of the base material coated with the photocatalyst hydrophilic, so that the dirt attached to the surface can be easily washed away with water by utilizing the hydrophilicity. It is well known that such a photocatalyst film is formed by applying a coating liquid containing a photocatalyst. In ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/61C09D7/43C09D7/41
CPCC09D7/65C09D7/61C09D7/63C09D7/41B01J21/063B01J35/004B01J35/12B01J37/0219C09D5/1693C09D5/1618C09D5/1687C08K3/36C08K2003/2241C08K2003/2244
Inventor 福嶋哲弥下村裕明足立进池田猛
Owner TOTO LTD
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