Composition for forming water repellent film, water repellent film, substrate with water repellent film, and article

摘要

Provided is a composition for forming a water repellent film which is excellent in water repellency and can form a water repellent film excellent in abrasion resistance, particularly in combination with light resistance test in a form close to actual use and excellent in abrasion resistance. And a water repellent film formed using the water repellent film-forming composition, a substrate with a water repellent film provided with the water repellent film on at least a part of the substrate, and an article comprising the water repellent film provided substrate. . A hydrolyzable silane compound (1) having a perfluoroalkyl group and having no ether bond, a poly (oxyfluoroalkylene) group and a plurality of hydrolyzable silyl groups having a specific structure and having a number average molecular weight The composition for water repellent film formation which contains the compound (21) which is 3000 or more so that it may become predetermined ratio.