Patent ID: 8901263

Claim:
A perfluoropolyether thiol compound comprising at least one perfluoropolyether segment, at least one mercapto group, and at least one intervening divalent carbonylimino moiety; wherein said compound is one of a class that is represented by the following general formula (II): R f ′—(O[CF(CF 3 )CF 2 O] a CF(CF 3 )—[C(═O)—N(R)-Q-(SH) x ]) y (II) wherein R f ′ is a linear or branched perfluoroalkyl or perfluoroalkylene group; a has an average value of 4 to 20; R is hydrogen or alkyl; Q is a divalent organic linking group selected from —CH 2 CH 2 CH 2 —[NH—C(═O)]—CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 —[N(CH 3 )—C(═O)]—CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 —[N(CH 3 )—C(═O)]—CH 2 CH 2 CH 2 —S—C(═O)—CH 2 CH 2 CH 2 —, —CH 2 CH 2 —[NH—C(═O)]—CH 2 CH 2 CH 2 —, —CH 2 CH 2 —[O—C(═O)]—CH 2 CH 2 —, —(CH 2 CH 2 O) 2 —[C(═O)]—CH 2 CH 2 —, and combinations thereof; x is an integer of 1; and y is an integer of 1 or 2.