| abstract |
(57) [Summary] (Modified) [PROBLEMS] A surface-treating composition for a substrate, which has a sufficient anti-staining action, has a long-lasting action, and also has sufficient weather resistance. A silicon-containing organic fluorine-containing polymer (1) represented by the following general formula (I), a fluorine-containing organic solvent (2), and an organic solvent compatible with the fluorine-containing organic solvent (2) However, the fluorine-containing organic solvent (2) is excluded] A surface treatment composition containing (3). In the formula, Rf is a perfluoroalkyl group, Z is a fluorine or trifluoromethyl group, a, b, c, d and e are 0 or an integer of 1 or more, a + b + c + d + e is at least 1 or more, and a, b, The order of existence of each repeating unit surrounded by c, d, and e is not limited in the formula. Y is hydrogen or an alkyl group having 1 to 4 carbon atoms, X is hydrogen, bromine or iodine, R 1 is a hydroxyl group or a hydrolyzable substituent, R 2 Is hydrogen or a monovalent hydrocarbon group, l is 0, 1 or 2, m Is 1, 2 or 3, and n is an integer of 1 or more. |