Patent ID: 8828565

Claim:
A lubricant composition comprising at least one kind of compound represented by following formula (1): where X represents a cyclic group that may be substituted; Y represents a divalent or higher-valent linking group having at least one polar group and having no aromatic cyclic group; p1 represents an integer of 1 to 4; p2, p3, and p4 each represents an integer of 0 to 4; q represents an integer of 1 to 30; n represents an integer of 1 to 10; s represents an integer of 1 to 4; and t represents an integer of 2 to 10, provided that the binding sequence of —(CF 2 ) p1 —, —(CF) p2 —, —[CF(CF 3 )] p3 —, and —[C(CF 3 ) 2 ] p4 — that constitute —{(CF 2 ) p1 (CF) p2 [CF(CF 3 )] p3 [C(CF 3 ) 2 ] p4 O}— in formula (1) is not limited, and —{(CF 2 ) p1 (CF) p2 [CF(CF 3 )] p3 [C(CF 3 ) 2 ] p4 O}— means a perfluoroalkyleneoxy group in which a perfluoroalkylene unit selected from —(CF 2 ) p1 —, —(CF) p2 —, —[CF(CF 3 )] p3 —, and —[C(CF 3 ) 2 ] p4 — and an oxygen atom are distributed randomly; when q is 2 or more, a plurality of —{(CF 2 ) p1 (CF) p2 [CF(CF 3 )] p3 [C(CF 3 ) 2 ] p4 O}— may be the same as or different from each other; when s is 2 or more, a plurality of n's and q's may be the same as or different from each other; and when t is 2 or more, a plurality of s's and Y's may be the same as or different from each other; and when p2 is 1 or more, the perfluoroalkyleneoxy group has a branched structure.