| abstract |
A water-repellent solution for forming a superior water-repellent film on a glass substrate is produced by subjecting a fluoroalkyl-group contained silane compound to a hydrolysis and a condensation polymerization. With this, at least dimers and trimers of the silane compound are produced. In case wherein the fluoroalkyl-group contained silane compound is of a type having the following general formula, satisfied performance of the formed water-repellent film is expected:wherein "m" is equal to or greater than 7 (seven) and "X" represents halogen, isocyanate-group or alkoxy-group, said alkoxy-group including methoxy-group [OCH3], ethoxy-group [OC2H5] or isopropoxy-group [OC3H5]. When the "m" is equal to or greater than 9 (nine), the performance of the film is much increased. |