Photocatalyst transfer film and production method thereof

Patent metadata

Field	Value
Publication number	US-11987682-B2
Application number	US-201917043517-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Apr 12, 2018
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

Provided are a photocatalyst transfer film allowing a uniform and highly transparent photocatalyst layer to be transferred to the surfaces of various transfer base materials; and a production method thereof. The photocatalyst transfer film has, on a biaxially oriented polypropylene film, a photocatalyst layer containing a titanium oxide particle-containing photocatalyst, a silicon compound and a surfactant. The production method of the photocatalyst transfer film includes applying a photocatalyst coating liquid to a biaxially oriented polypropylene film; and performing drying. The photocatalyst coating liquid contains a titanium oxide particle-containing photocatalyst, a silicon compound, a surfactant and an aqueous dispersion medium.

First claim

The invention claimed is:

1. A photocatalyst transfer film comprising:
a biaxially oriented polypropylene film having an arithmetic average roughness Ra of 0.01 to 1 μm when measured by a 3D laser microscope; and
a photocatalyst layer that is in direct contact with the biaxially oriented polypropylene film and contains a titanium oxide particle-containing photocatalyst, a silicon compound which is a hydrolysis condensate of a tetrafunctional silicon compound and is obtained under the presence of an organic ammonium salt, and a surfactant.

2. The photocatalyst transfer film according to claim 1 , wherein the surfactant is an acetylene-based surfactant.

3. The photocatalyst transfer film according to claim 1 , wherein the photocatalyst layer has a thickness of 20 to 300 nm.

4. The photocatalyst transfer film according to claim 1 , wherein the biaxially oriented polypropylene film has a thickness of 12.5 to 100 μm.

5. The photocatalyst transfer film according to claim 1 , wherein a protective layer containing a silicon compound is further laminated on the photocatalyst layer.

6. A method for producing a photocatalyst transfer film according to claim 1 , comprising:
applying a photocatalyst coating liquid to said biaxially oriented polypropylene film having an arithmetic average roughness Ra of 0.01 to 1 μm when measured by a 3D laser microscope, the photocatalyst coating liquid containing said titanium oxide particle-containing photocatalyst, said silicon compound which is a hydrolysis condensate of a tetrafunctional silicon compound and is obtained under the presence of an organic ammonium salt, said surfactant and an aqueous dispersion medium; and
performing drying.

7. A photocatalyst transfer film comprising:
a biaxially oriented polypropylene film having an arithmetic average roughness Ra of 0.01 to 1 μm when measured by a 3D laser microscope; and
a photocatalyst layer that is in direct contact with the biaxially oriented polypropylene film and contains an anatase-type or rutile-type titanium oxide particle-containing photocatalyst, a silicon compound which is a hydrolysis condensate of a tetrafunctional silicon compound and is obtained under the presence of an organic ammonium salt, and a surfactant.

8. The photocatalyst transfer film according to claim 7 , wherein the surfactant is an acetylene-based surfactant.

9. The photocatalyst transfer film according to claim 7 , wherein the photocatalyst layer has a thickness of 20 to 300 nm.

10. The photocatalyst transfer film according to claim 7 , wherein the biaxially oriented polypropylene film has a thickness of 12.5 to 100 μm.

11. The photocatalyst transfer film according to claim 7 , wherein a protective layer containing a silicon compound is further laminated on the photocatalyst layer.

12. A method for producing a photocatalyst transfer film according to claim 7 , comprising:
applying a photocatalyst coating liquid to said biaxially oriented polypropylene film having an arithmetic average roughness Ra of 0.01 to 1 μm when measured by a 3D laser microscope, the photocatalyst coating liquid containing said titanium oxide particle-containing photocatalyst, said silicon compound which is a hydrolysis condensate of a tetrafunctional silicon compound and is obtained under the presence of an organic ammonium salt, said surfactant and an aqueous dispersion medium; and
performing drying.

Assignees

• Shinetsu Chemical Co

Inventors

• Yuyama Masahiro
• Furudate Manabu
• Inoue Tomohiro

Classifications

• B01J35/395

  Thickness of the active catalytic layer · CPC title

• B01J35/39

  Photocatalytic properties · CPC title

• B01J31/38

  of titanium, zirconium or hafnium · CPC title

• B01J31/06

  containing polymers {(organometallic polymers B01J31/123; polymer-bound organometallic complexes B01J31/165; coordination polymers B01J31/1691)} · CPC title

• B01J21/06

  Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof · CPC title