Patent ID: 6946534

Claim:
Fluorinated polyethers having a fluorinated aliphatic group at a main chain, which are represented by the following formula (1): where R F represents OCH 2 (CF 2 ) n CH 2 O, or OCH 2 CF 2 O(CF 2 CF 2 O) n CF 2 CH 2 O, where n is a natural number ranging from 1 to 12; Ar 1 represents where B is not present or a C═O group, or Ar 1 represents where Hal is one selected from F, Cl, Br and I; Ar 2 represents where D is one selected from —C(CF 3 ) 2 , —C(CH 3 ) 2 , —CO—, —SO 2 —, —O— and —S—, or Ar 2 represents where R 1 and R 2 are the same or different and each independently represents a halogen atom selected from F, Cl, Br and I, and m is a natural number of 1-3, or Ar 2 represents E represents H, or where P is H or a substituted or unsubstituted phenyl group; x is a number ranging from 0.1 to 1.0; y is 1.0−x.