Coated article, coating liquid composition, and method for producing coated article

Abstract

The invention is an coated article composed of a substrate and an organic-inorganic composite film, which is coated on the substrate and has an oxide of a cation atom capable of forming an oxide network coated on the surface of the substrate, and the same has a part of oxygen of the oxide substituted by an organic group, wherein the organic-inorganic composite film includes alkali metal oxides at a ratio of 0.1 through 30% of the total number of the alkali metal atoms and the cation atoms expressed in terms of the number of alkali metal atoms, and the article coated with a high-performance organic-inorganic composite film, is able to withstand outdoor uses and has high hardness.

1 . A composition for coating, including: 
 (a) a hydrolyzable and condensation-polymerizable organic metal compound having an organic group of nonhydrolyzability;    (b) an acid;    (c) an alkali metal compound; and    at least one of (d) a completely condensation-polymerizable or hydrolyzable/condensation-polymerizable compound and (e) an alkaline earth metal compound.    
   
   
       2 . The composition for coating as set forth in  claim 1 , wherein the number of alkali metal atoms of said (c) constituent is 0.1 through 30% with respect to the total number of cation atoms (excluding cation atoms of organic groups).  
   
   
       3 . The composition for coating as set forth in  claim 1 , wherein the number of cation atoms, excluding those contained within the organic groups, of said (d) constituent is 0 through 99.8% with respect to the total number of cation atoms (excluding cation atoms of organic groups).  
   
   
       4 . The composition for coating as set forth in  claim 1 , wherein the number of alkaline earth metal atoms of said (e) constituent is 0.1 through 30% with respect to the total number of cation atoms (excluding cation atoms of organic groups).  
   
   
       5 . The composition for coating as set forth in  claim 1 , wherein, with respect to the total number of cation atoms (excluding cation atoms of organic groups) , the number of cation atoms, excluding cation atoms contained within the organic groups, of said (a) constituent is 0.1 through 99.8%; the number of alkali metal atoms of said (c) constituents is 0.1 through 30%; the number of cation atoms, excluding cation atoms contained within the organic groups, of said (d) constituent is 0 through 99.7%; and the number of alkaline earth metal atoms of said (e) constituent is 0.1 through 30%; and said (b) constituent is set to a normality of 0.001 through 3, and water is included at a ratio of 0 through 5% by weight.  
   
   
       6 . The composition for coating as set forth in  claim 1 , including a solvent whose boiling point is 150° C. or less at atmospheric pressure.  
   
   
       7 . The composition for coating as set forth in  claim 6 , wherein said solvent is alcohol.  
   
   
       8 . The composition for coating as set forth in  claim 1 , wherein said (a) constituent is trialkoxysilane including a fluoroalkyl group.  
   
   
       9 . A method for producing a coated article, where in a composition for coating described in  claim 1  is coated and dried on a surface of a substrate.  
   
   
       10 . The method for producing a coated article, as set forth in  claim 9 , wherein said drying is carried out at room temperature.  
   
   
       11 . The method for producing a coated article, as set forth in  claim 9 , wherein said drying is carried out in an atmosphere whose relative humidity is 40% or less.  
   
   
       12 . The method for producing a coated article, as set forth in  claim 9 , further comprising heating carried out at a temperature which is higher than a room temperature but equal to or less than 300° C. after said drying.