| abstract |
A perfluoro (poly) ether group-containing silane compound suitable for forming a surface treatment layer having durability against UV is provided. An -PFPE-X-SiR a k R b l perfluoro (poly) ether group-containing silane compound containing a structure represented by R c m. For example, PFPE is a perfluoro (poly) ether group, X is a substituted or unsubstituted alkylene group having 2 to 20 carbon atoms, R a is a functional group containing Si, R b is a hydroxyl group or a hydrolyzable group, R c represents a hydrogen atom or a lower alkyl group, k is an integer from 1 to 3, l and m are each an integer of 0 to 2, in each -SiR a k R b l R c m, k, l and The sum of m is 3. [Selection figure] None |