Coating process and silicon-containing liquid composition

Abstract

The present invention relates to a silicon-containing liquid composition comprising (A) 100 parts by weight of an organosilicate, calculated as SiO 2 , (B) 0.1 to 10 parts by weight of a catalyst, (C) 100 to 50,000 parts by weight of water, and (D) 100 to 50,000 parts by weight of a solvent, a weight ratio of the water (C) to the solvent (D) being in the range of 30:70 to 80:20.

What is claimed is:  
     
         1 . A silicon-containing liquid composition comprising (A) 100 parts by weight of an organosilicate, calculated as SiO 2 , (B) 0.1 to 10 parts by weight of a catalyst, (C) 100 to 50,000 parts by weight of water, and (D) 100 to 50,000 parts by weight of a solvent, a weight ratio of the water (C) to the solvent (D) being in the range of 30:70 to 80:20.  
     
     
         2 . A silicon-containing liquid composition according to  claim 1 , having a hydrolysis percentage of 1,000 to 90,000%.  
     
     
         3 . A silicon-containing liquid composition according to  claim 1 , further comprising (E) at least one additive selected from the group consisting of pigments, fillers and paint additives.  
     
     
         4 . A silicon-containing liquid composition according to  claim 1 , wherein the organosilicate (A) is represented by the general formula:  
       SiO x (OR) y    
       wherein x is a number of 0 to 1.2, and y is a number of 1.4 to 4 with the proviso that (2x+y) is 4; and R is C 1  to C 4  alkyl.  
     
     
         5 . A silicon-containing liquid composition according to  claim 1 , wherein the organosilicate (A) is methyl silicate.  
     
     
         6 . A coating process comprising: 
 coating a surface of a structure with the silicon-containing liquid composition as defined in  claim 1  so as to prevent the surface of the structure from being contaminated.    
     
     
         7 . A coating process comprising: 
 coating a surface of an inorganic structure with the silicon-containing liquid composition as defined in  claim 1  so as to prevent the surface of the inorganic structure from being contaminated.    
     
     
         8 . A coating process comprising: 
 forming the silicon-containing liquid composition as defined in  claim 1  into an aerosol; and    spray-coating the aerosol onto a surface of a structure.    
     
     
         9 . A coating process comprising: 
 wipe-coating a surface of a structure with the silicon-containing liquid composition as defined in  claim 1 .    
     
     
         10 . A coating film produced from the silicon-containing liquid composition as defined in  claim 1 , said coating film having a surface resistivity of 7.5×10 7  to 1.5×10 12 .  
     
     
         11 . A coating film produced from the silicon-containing liquid composition as defined in  claim 1 , said coating film having a water contact angle of 5° to 35°.  
     
     
         12 . A silicon-containing liquid composition comprising (A) 100 parts by weight of an organosilicate, calculated as SiO 2 , (B) 0.1 to 10 parts by weight of a catalyst, (C) 5,000 to 30,000 parts by weight of water, and (D) 5,000 to 30,000 parts by weight of a solvent, and having a hydrolysis percentage of 10,000 to 90,000%, a weight ratio of the water (C) to the solvent (D) being in the range of 30:70 to 80:20, said composition being produced by contacting (A) 100 parts by weight of the organosilicate, calculated as SiO 2 , (B) 0.1 to 10 parts by weight of the catalyst; (C) 500 to 5,000 parts by weight of the water; and (D) 100 to 5,000 parts by weight of the solvent, with each other; reacting a resultant mixture until a hydrolysis percentage thereof reaches 1,000 to 90,000%; and diluting a resultant reaction mixture with additional amounts of the water (C) and the solvent (D) to adjust a final hydrolysis percentage thereof into 10,000 to 90,000%.