COATED MEMBRANE FOR OUTSIDE PLATE, COATING MATERIAL COMPOSITION, FORMATION OF COATING MEMBRANE AND COATED MATERIAL

PROBLEM TO BE SOLVED: To obtain a coating membrane for outside plate having properties preventing fouling by raindrops, excellent in acid and cracking resistances and useful for a building, a displayed material, etc., by forming the coating membrane to have a prescribed value of the dynamic retreating tension (Tr) of water. SOLUTION: This coating membrane has >=47dyne/cm dynamic retreating tension of water (Tr) and preferably >=0.01mJ/m acidity term (r ). The coating membrane for a outer plate comprises (A) an organic polymer having one or more kinds of alkoxysilyl group of formula I [R is H, a 1-10C alkyl, a 1-10C epoxyalkyl, an aryl, etc.; (n) is 0-2], (B) at least one of partially hydrated condensed material obtained by hydrating an organic silicon compound of formula II [R is a 1-6C alkyl, a 1-11C epoxyalkyl, an aryl, etc.; R is a 1-6C alkyl; (m) is 0-3] and condensing the partially hydrated and condensed compound and having