Transparent aqua-based nano sol-gel composition and method of applying the same

Abstract

The present invention relates to a transparent aqua-based nano sol-gel composition and method of applying the same to transparent substrates without decreasing the visible light and sunlight transmittance thereof. The transparent aqua-based nano sol-gel can be applied to a surface of a transparent substrate to form a porous film which will not reduce the visible light and sunlight transmittance of the transparent substrate and will impart a self-cleaning function to the transparent substrate. The transparent aqua-based nano sol-gel composition contains a transparent aqua-based zeolite sol-gel having a particle size of less than 100 nm, a polysiloxane derivate, a surfactant, a transparent aqua-based photocatalytic sol-gel of titanium dioxide having a particle size of less than 100 nm, and deionized water.

1 . A method of applying a transparent aqua-based nano sol-gel composition, comprising:
 (i) the step of preparing a transparent aqua-based nano sol-gel by well mixing, and then filtering, the transparent aqua-based nano sol-gel composition as claimed in  claim 1  to obtain a transparent aqua-based nano sol-gel; and   (ii) the step of preparing a coating film upon a transparent substrate by applying the transparent aqua-based nano sol-gel to a surface of the transparent substrate evenly to form a transparent coating film and then curing the coating film while retaining the evenness of the coating film so that the transparent coating film can adhere to the surface of the substrate more rigidly and reliably.   
     
     
         2 . The method of applying a transparent aqua-based nano sol-gel composition as claimed in  claim 1 , wherein in step (ii), the transparent aqua-based nano sol-gel is evenly applied to the surface of the transparent substrate with any wet coating method selected from a roll coating method, a wipe coating method, a brush coating method, a dip coating method, a spray coating method, a spin coating method and a sprinkle coating method. 
     
     
         3 . The method of applying a transparent aqua-based nano sol-gel composition as claimed in  claim 1 , which can be carried out to coat one side or both sides of the substrate. 
     
     
         4 . The method of applying a transparent aqua-based nano sol-gel composition as claimed in  claim 2 , which can be carried out to coat one side or both sides of the substrate. 
     
     
         5 . The method of applying a transparent aqua-based nano sol-gel composition as claimed in  claim 1 , wherein in step (ii), the coating film is cured with natural air drying for 24 hours or above, or heating at a temperature of 450° C. or below for 5 minutes or above. 
     
     
         6 . The method of applying a transparent aqua-based nano sol-gel composition as claimed in  claim 1 , wherein the dry film thickness of the finished transparent aqua-based coating film is between 40˜350 nm. 
     
     
         7 . The method of applying a transparent aqua-based nano sol-gel composition as claimed in  claim 5 , wherein the dry film thickness of the finished transparent aqua-based coating film is between 40˜350 nm.