Patent ID: 8734966

Claim:
A compound of the formula (1) R 1 —C 6 H 4 O—CH 2 CH(OH)CH 2 OCH 2 —R 2 —CH 2 —O—R 3 (1) wherein R 1 is hydrogen, alkoxyl having 1 to 4 carbon atoms, amino or amido, R 2 is —CF 2 O(CF 2 CF 2 O) x (CF 2 O) y CF 2 —, —CF 2 CF 2 O(CF 2 CF 2 CF 2 O) z —CF 2 CF 2 — or —CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) n CF 2 CF 2 CF 2 —, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 4, R 3 is —CH 2 CH(OH)CH 2 OH, —CH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH or —(CH 2 ) m OH, m is an integer of 2 to 6.