| 摘要 |
PROBLEM TO BE SOLVED: To provide a stainproof painting agent composition capable of exhibiting hydrophilicity and stainproof property directly after the painting on the surface of a structure without needing an acid treatment or the like, excellent in storage stability, drying property and handleability, and capable of forming paint film excellent in adhesivity and transparency, and having good appearance, and to provide a method for manufacturing the composition. SOLUTION: An organo silicate of the general formula 1 (wherein, R is a 1-10C hydrocarbon group; and n is an integer of >=1) is hydrolyzed in the presence of an acid catalyst so that the amount of hydrolyzing water is 60-600 pts.wt. based on 100 pts.wt. of the Si in the organo silicate in terms of SiO2, and a water-containing diluent is added to the obtained hydrolyzate so that the water content after the adjustment is 600-4,000 pts.wt. based on 100 pts.wt. of the Si in the organo silicate in terms of SiO2.
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