| abstract |
The present invention provides a novel perfluoro(poly)ether-based decane compound which can form a layer having water repellency, oil repellency, stain resistance, and high surface smoothness and friction durability, and contains the same A surface treatment composition of a perfluoro(poly)ether-based decane compound.nIt is represented by the formula (1): (Rf-PFPE) α-X-(SiQkY3-k)β‧‧(1) wherein Rf represents a C1-16 alkyl group which may be substituted by a fluorine atom, and PFPE represents Perfluoro(poly)ether group, X represents an organic group of 3 to 10 valence, Y represents a hydrogen atom, a hydroxyl group, a hydrolyzable group or a hydrocarbon group, Q represents -Z-SiR1pR23-p, and Z represents a divalent The organic group, R1 represents a hydroxyl group or a hydrolyzable group, R2 represents an alkyl group of C1-22 or Q', and the Q' system has the same meaning as Q, and p is an integer of 0 to 3 in each of Q and Q'. In the formula (1), the sum of p is 1 or more, and in Q, the Si system which is linearly connected via the Z group has a maximum of 5, the k is an integer of 1 to 3, and the α and β are 1 to 9. The integer, the sum of α and β is the value of the valence of X. |