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Nano composite photocatalytic coating

A nano-composite, photocatalytic technology, applied in the field of coatings and coatings, can solve the problems of limited application methods, coatings are not suitable for continuous use, etc., and achieve the effects of light weight, good aging resistance, and long processing time

Inactive Publication Date: 2006-09-27
YORK INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The properties of such coating solutions, including the titania sol-gels described further herein, severely limit the application methods
Due to these limitations in processing time and application methods, known coatings are not suitable for continuous use in manufacturing equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This formulation is a preferred embodiment for preparing primers for organic polymeric substrates. The recommended primer application techniques are the spray technique, the roller and brush technique and the dip technique.

[0040] Substance Chemical composition of coating (weight %)

[0041] Polyalkylphenylsiloxane 44%

[0042] Xylene 55.5%

[0043] Fumed silica 0.5%

[0044] Fumed silica was mixed with xylene and stirred until the silica was substantially evenly distributed. Add the polyalkylphenylsiloxane to the mixture and mix well. When the primer is used on a substrate comprising an organic polymeric material, its use is not limited to application on organic polymeric substrates, and can be used on any type of substrate if adhesion is a concern.

Embodiment 2

[0046] For this formulation, spray, roller and brush techniques are recommended.

[0047] Substance Chemical composition of coating (weight %)

[0048] Polyalkylphenylsiloxane 44%

[0049] Xylene 50%

[0050] Fumed silica 0.5%

[0051] NCPP 5%

[0052] IABP 0.5%

[0053] Mix NCPP with xylene and stir. While stirring the mixture, the IABP was added, followed by the fumed silica until the powder was substantially uniformly dispersed. The polyalkylphenylsiloxane is then added to the mixture and stirred until the powder is substantially uniformly dispersed. For spraying, it may be necessary to adjust the solvent content to obtain the desired fluidity, which in turn depends on the spraying parameters of the spraying equipment used.

Embodiment 3

[0055] For this formulation, dip coating techniques, flow coating processes, spin coating processes and capillary coating processes are recommended.

[0056] Substance Chemical composition of coating (weight %)

[0057] Polyalkylphenylsiloxane 44%

[0058] Xylene 50%

[0059] Fumed silica 0.1%

[0060] NCPP 5.4%

[0061] IABP 0.5%

[0062] Mix NCPP with xylene and stir. While stirring the mixture, the IABP was added, followed by the fumed silica. Stir the mixture until the mixture is properly mixed. The polyalkylphenylsiloxane is then added to the mixture and the mixture is stirred until a substantially homogeneous mixture is obtained.

[0063] Technical data

[0064] Color: transparent white

[0065] Gloss: semi-gloss

[0066] Volume percent solids: 33

[0067] Viscosity at 20°C: 10cps

[0068] Specific gravity: 0.96

[0069] Flash point: 85

[0070] Pot life at room temperature: 12 hours

[0071] Drying time at room temperature: 30 seconds

[0072] Dry to To...

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Abstract

A photocatalytic coating composition and method of coating articles, the composition containing solvents for rapid evaporation at room temperature, polyalkylphenylsiloxane, xylene, nano densified hydrophilic fumed silica, nanostructured composite photocatalyst powder and nano inorganic anti-bacteria powder. The coating may be applied by conventional coating methods to organic or inorganic structured surfaces where photocatalytic activity is desired, such as in a forced air-circulating environment. Once applied, the coating quickly dries to leave an adherent, flexible, durable, and long-lasting photocatalytic coating having a large surface area and exhibiting high surface activity against pathogens and pollutants such as bacteria, viruses, mold, fungi, and volatile organic compounds.

Description

technical field [0001] The present invention generally relates to coatings and coating methods. In particular, the present invention relates to novel nanocomposite photocatalytic coatings for use in heating, ventilation, air conditioning and refrigeration (HVACR) equipment, and methods of applying said coatings to such equipment. Once the coating is applied to the substrate, the coating is stable in UV, highly oxidizing and high temperature environments, such as in forced air circulation systems containing UV light as the purification mechanism. When exposed to ultraviolet light, the photocatalytic component in the coating acts as a catalyst, thereby promoting the photocatalytic oxidation of organic chemicals and promoting the elimination of bacteria, viruses, dust mites, Mold and spores, fungi and other contaminants. technical background [0002] The use of titanium dioxide as a catalyst in photocatalytic oxidation is well known. When exposed to ultraviolet (UVA, UVB and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/00B01J27/18B01J37/02A61L9/20B01J27/185B01J31/06
CPCB01J37/0219F24F2003/1675B01J27/1802B01J37/0236C09D183/04B01J31/06B01J27/1853B01J35/004B01J35/002B01J35/0013F24F2003/1628B01J27/1817A61L9/205F24F8/167F24F8/24B01J35/30B01J35/39B01J35/23C08L2666/54
Inventor 梁曼隆
Owner YORK INT
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