Coating composition and uses thereof

Abstract

A coating composition comprising a photocatalyst composite and a silicone resin is provided, in which the content of the photocatalyst composite ranges from about 1% to about 70% by weight (wt %), based on the total weight of the coating composition, and the photocatalyst composite contains a heat insulation material and a photocatalyst material. An energy-saving material is further provided, which includes a substrate and a film formed from the coating composition of the present invention on at least one of the surfaces of the substrate. The energy-saving material is capable of effectively shielding off infrared (IR) light, substantially decreasing indoor temperature, and reducing power consumption. In addition, in the presence of the photocatalyst which can absorb ultraviolet light, the material also exhibits good superhydrophilic and self-cleaning properties and provides antimicrobial and deodorization effects.

1 . A coating composition, comprising a photocatalyst composite and a silicone resin, wherein the content of the photocatalyst composite is about 1 to 70 wt %, based on the total weight of the composition, and the photocatalyst composite comprises:
 (1) a heat insulation material selected from the group consisting of antimony tin oxide (ATO), indium tin oxide (ITO), aluminum zinc oxide (AZO), indium zinc oxide (IZO), and gallium zinc oxide (GZO), and a combination thereof; and   (2) a photocatalyst material selected from the group consisting of titanium dioxide, zinc oxide, strontium titanate, and tin oxide, and a combination thereof, wherein the content of the photocatalyst material is about 10 to 90 wt %, based on the total weight of the photocatalyst composite.   
     
     
         2 . The coating composition according to  claim 1 , wherein the silicone resin is prepared through a sol-gel process. 
     
     
         3 . The coating composition according to  claim 1 , further comprising an organic solvent. 
     
     
         4 . The coating composition according to  claim 1 , wherein the heat insulation material is ATO or ITO. 
     
     
         5 . The coating composition according to  claim 1 , wherein the content of the photocatalyst material is about 40 to 85 wt %, based on the total weight of the photocatalyst composite. 
     
     
         6 . The coating composition according to  claim 1 , wherein the photocatalyst material is titanium dioxide. 
     
     
         7 . The coating composition according to  claim 1 , wherein the photocatalyst composite has a particle size of about 2 to 100 nanometers (nm). 
     
     
         8 . The coating composition according to  claim 1 , further comprising inorganic particulates selected from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), cadmium sulfide (CdS), zirconia (ZrO 2 ), calcium phosphate (Ca 3 (PO 4 ) 2 ), and calcium oxide (CaO), and a mixture thereof. 
     
     
         9 . An energy-saving material, comprising:
 a substrate; and   a film formed from the coating composition according to  claim 1  on at least one surface of the substrate.   
     
     
         10 . The energy-saving material according to  claim 9 , wherein the film is formed by coating, spraying, or dipping the coating composition according to  claim 1  on at least one surface of the substrate. 
     
     
         11 . The energy-saving material according to  claim 9 , wherein the film has a pencil hardness of H or higher as measured according to JIS K5400 standard method.