Patent ID: 7449266

Claim:
A compound according to Formula (I): R f —(Y—BTA) j (I) wherein R f is a monovalent or divalent perfluoropolyether group having at least two catenated oxygen atoms; Y is a covalent bond or is a divalent organic linking group selected from carbonyl, carbonyloxy, carbonylimino, sulfonamido, —C k H 2k O(CO)—, —(CO)NR d —C k H 2k —(CO)O—, —(CO)NR d —C k H 2k —(CO)NR d —, —(CO)NR d —C k H 2k —O(CO)—, —(CO)O—C k H 2k —(CO)O—, —(CO)O—C k H 2k —(CO)NR d —, —(CO)NR d —Ar—(CO)O—, —(CO)NR d —Ar—(CO)NR d —, —(CO)NR d —Ar—O(CO)—, —(CO)O—Ar—(CO)O—, —(CO)O—Ar—(CO)NR d —, or —(CO)—Ar—O(CO)— wherein Ar is an arylene, k is an integer of 1 to 10, and R d is hydrogen or an alkyl, with the proviso that Y is not equal to —NH—(CO)—; j is 1 or 2; and BTA is a monovalent benzotriazolyl group selected from wherein the benzotriazolyl group is unsubstituted or substituted with an alkyl, alkoxy, or combination thereof.