Composition comprising perfluoropolyether

1. 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.

2. A composition according to claim 1 wherein M is H, Li, Na, K, Ca, or combinations of two or more thereof.

3. A composition according to claim 1 wherein b is 0 and R is not four hydrogen atoms and —OH, or —NH 2 ; or solely H or —NO 2 groups or combinations thereof.

4. A composition according to claim 1 wherein said composition is said aryl perfluoropolyether.

5. A composition according to claim 1 further comprising a halogenated oil which is a perfluoropolyether.

6. A composition according to claim 5 wherein said aryl perfluoropolyether is present in said composition from about 0.01 to about 99% by weight.

7. A composition according to claim 1 further comprising a halogenated oil and a thickening agent, wherein said halogenated oil is a perfluoropolyether, a fluorosilicone, a polytrifluorochloroethylene, or combinations of two or more thereof; and said thickening agent is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof.

8. A composition according to claim 7 further comprising an additive wherein said additive is perfluoroalkyl surfactant, polyoxyperfluoroalkyl surfactant, oil or grease stabilizer, anticorrosive agent, anti-wear agent, or combinations of two or more thereof.

9. A composition according to claim 8 wherein said aryl perfluoropolyether is present in said composition from about 0.1 to about 90% and said thickening agent is present in said composition from about 0.01 to about 60%, both by weight.

10. A grease composition comprising, or produced by combining, a halogenated oil, an aryl perfluoropolyether and a thickening agent, wherein said halogenated oil is a perfluoropolyether, a fluorosilicone, a polytrifluorochloroethylene, or combinations of two or more thereof; said aryl perfluoropolyether is the same as recited in claim 1 and said thickening agent is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof.

11. A grease composition according to claim 10 furthercomprising an additive wherein said additive is perfluoroalkyl surfactant, polyoxyperfluoroalkyl surfactant, oil or grease stabilizer, anticorrosive agent, anti-wear agent, or combinations of two or more thereof.

12. A grease composition according to claim 11 wherein said aryl perfluoropolyether is present from about 0.1 to about 90% and said thickening agent is present from about 0.01 to about 50%, both by weight of said grease.

13. A composition comprising, or produced by combining, a perfluoropolyether, an aryl perfluoropolyether and a thickening agent, wherein said aryl perfluoropolyether is the same as recited in claim 1 ; and said thickening agent is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof.