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Photocatalyst laminate

A technology of photocatalyst and laminate, which is applied in the direction of catalyst protection, catalyst activation/preparation, catalytic reaction, etc., can solve the problems of loss of photocatalytic function, decrease of surface hydrophilicity, and poor antifouling property, etc., to maintain photocatalysis The effect of function, high design and stain resistance

Active Publication Date: 2019-04-16
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in fact, when a photocatalyst layer is formed on a base material through a primer layer containing the above-mentioned benzotriazole compound and exposed to the outside for a long period of time, it is found that the initial good photocatalytic function is gradually lost, and the hydrophilicity of the surface becomes weaker. Reduced, poor anti-fouling properties

Method used

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Examples

Experimental program
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Embodiment

[0239] The following examples and comparative examples are given to describe the present invention more specifically, but the present invention is not limited to these examples.

[0240] [1] Preparation of core-shell particle dispersion and titanium oxide particle aqueous dispersion

Synthetic example 1

[0241] [Synthesis Example 1] Preparation of Aqueous Dispersion of Core-Shell Titanium Oxide Microparticles (TW-1)

[0242] An aqueous dispersion of core-shell type titanium oxide fine particles having tetragonal titanium oxide fine particles in which tin and manganese were solid-solved as a core and silicon oxide as a shell was prepared.

[0243] First, an aqueous dispersion containing titanium oxide fine particles serving as the core was prepared, and secondly, an active silicic acid solution prepared by treating sodium silicate with a cation exchange resin was mixed to prepare core-shell type titanium oxide fine particles having a shell of silicon oxide. water dispersion.

[0244] Add 33 g of a 50 mass % tin (IV) chloride solution (manufactured by Nippon Chemical Industry Co., Ltd.) to 660 g of a 36 mass % titanium (IV) chloride aqueous solution (manufactured by Ishihara Sangyo Co., Ltd., product name: TC-36) , Manganese (II) monoxide (manufactured by High Purity Chemical R...

Synthetic example 2

[0249] [Synthesis Example 2] Synthesis of Core-Shell Type Titanium Oxide Microparticle Ethanol Dispersion (TE-1)

[0250] The core-shell type titanium oxide microparticles obtained in Synthesis Example 1 (TW-1, 300 g, solid content concentration of 10% by mass) and a sulfonic acid-based cationic ion-exchange resin (3 g) as a catalyst. Methyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., product name "KBM-13", 225 g) was put there, and stirred vigorously (250 rpm). By stirring, the dispersion liquid reacted with the alkoxysilane, and it was observed that it became uniform. At this time, it was observed that the temperature of the dispersion liquid rose from 25°C to 52°C.

[0251] After heating and stirring for 2 hours so that the temperature of the dispersion liquid became 50° C., ethanol (750 g) was added to the dispersion liquid while stirring (250 rpm), and diluted. The diluted dispersion was introduced into an ultrafiltration machine, and 800 g of exudat...

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Abstract

A photocatalyst laminate which is composed of an undercoat layer provided on a substrate and a photocatalyst layer laminated on the surface of the undercoat layer. The undercoat layer contains (A) 100parts by mass of a resin component and (B) 0.1-50 parts by mass of fine core-shell particles, each of which has a core that is formed of a fine tetragonal titanium oxide solid solution particle wherein tin and manganese are solid-solved and a shell that is formed from silicon oxide on the outside of the core. The photocatalyst laminate is not susceptible to decrease in the photocatalyst functioneven under outdoor exposure for a long period of time, and is thus capable of providing a coated article that exhibits excellent weather resistance.

Description

technical field [0001] The present invention relates to a photocatalyst laminate, and more specifically, to a photocatalyst laminate comprising an undercoat layer containing ultraviolet-shielding inorganic fine particles and a photocatalyst layer provided on a substrate. Background technique [0002] The photocatalyst coating film formed on the surface of various substrates has the following functions: the photocatalyst such as titanium oxide contained therein hydrophilizes the surface of the substrate by light irradiation, thereby easily washing away the dirt on the surface with water, or Decompose various organic matter. [0003] This photocatalyst coating film having a photocatalytic function is effectively used for cleaning, deodorizing, antibacterial, etc. on the surface of a substrate, for example, application to plastic moldings such as building exterior materials, interior materials, and films in development. [0004] However, if it is a method of directly forming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18B01J23/34B01J35/02B32B27/00C09D5/00C09D7/62C09D127/12C09D183/04C09D201/00
CPCB01J35/02B32B27/00B32B27/18C09D5/00C09D127/12C09D183/04C09D201/00B01J23/34C03C17/42C03C2217/445C03C2217/477C09D7/62B01J21/063B01J35/004C08K3/08C08K3/22C08K3/36C08K9/02B01J21/06B01J21/08B01J31/06B01J31/125B01J31/127B01J31/38B01J33/00B01J35/0013B01J37/0018B01J37/0221B01J37/0228B01J37/0244B01J37/033B01J37/04B01J2231/005B01J2531/002
Inventor 古馆学井上友博吉井良介增田幸平
Owner SHIN ETSU CHEM IND CO LTD
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