Patent ID: 8084405

Claim:
A composition comprising an aryl perfluoropolyether which is a difunctional aryl perfluoropolyether having the formula of R f 1 —[(Y) a —(C t R (u+v) )—(O—C t R 1 (u+v) ) b —R] 2 wherein R f 1 has a formula weight of about 400 to about 15,000; R f 1 is —(CF 2 CF 2 O) e (CF 2 O) f CF 2 —, —(C 3 F 6 O) p (CF 2 CF 2 O) q (CFXO) r CF 2 —, —(CF 2 CF 2 O)(C 3 F 6 O) w CF(CF 3 )—, —CF(CF 3 )O(C 3 F 6 O) w —R f 2 —O(C 3 F 6 O) w CF(CF 3 )—, —((CQ 2 )CF 2 CF 2 O) s CF 2 CF 2 —, or combinations of two or more thereof; where the units with formulae CF 2 CF 2 O and CF 2 O are randomly distributed along the chain; X is —F, —CF 3 , or combinations thereof; e and f are numbers such that the e/f ratio ranges from about 0.3 to about 5; each Q is independently —F, —Cl, or —H; p, q and r are numbers such that (p+q) ranges from 1 to 50 and r/(p+q) ranges from 0.1 to 0.05; each w is independently 2 to 45; R f 2 is linear or branched —C m F 2m —; m is 1-10; s is an average number such that the formula weight of R f 1 ranges from 400 to 15,000; each R is independently —H, —OH, —SO 3 M, NR 3 2 , —NO 2 , —R 4 OH, —R 4 SO 3 M, —R 4 NR 3 2 , —R 4 NO 2 , —R 4 CN, —C(O)OR 4 , —C(O)OM, —C(O)R 4 , —C(O)NR 3 2 , or combinations of two or more thereof; except that when b=0, R cannot be four hydrogen atoms and —OH, or —Br, or —NH 2 ; or R cannot be solely H or —NO 2 , or combinations thereof; each R 1 is independently H, —OH, —SO 3 M, —NR 3 2 , —NO 2 , —CN, —R 4 OH, —R 4 SO 3 M, —R 4 NR 3 2 , —R 4 NO 2 , —R 4 CN, —C(O)OR 4 , —C(O)OM, —C(O)R 4 , —C(O)NR 3 2 , or combinations of two or more thereof provided that if b=0, the combination of R and R 1 cannot be four or more hydrogen atoms and —OH, —NH 2 , or —NO 2 ; each R 3 is independently H, C 1 -C 10 alkyl, or combinations of two or more thereof; R 4 is a C 1 -C 10 alkyl; M is a hydrogen or metal ion wherein the metal ion is selected from the group consisting of alkali metal, alkaline earth metal, transition metal, or combinations of two or more thereof; a is 0 or 1; b is 0-5; Y is a divalent radical —CH 2 OCH 2 —, —(CH 2 ) o —O—, —(CF 2 ) n —, —CF 2 O—, —CF 2 OCF 2 —, —C(O)—, —C(S)—, or combinations of two or more thereof; n is about 1 to about 5; o is about 2 to about 5; t is equal to 6+u; u is any combination of 0, 2, 4, 6, 8, 10, 12, 14, 16; and v is independently either 2 or 4.