FLUOROPOLYETHER GROUP CONTAINING COMPOUND

1 . A fluoropolyether group-containing compound of formula (1) or (2) below:

R F1 —X—R Si   (1)

R Si —X—R F2 —X—R Si   (2)

wherein

R F1 is Rf 1 —R F —O q —;

R F2 is —Rf 2 p —R F —O q —;

Rf 1 is a C 1-16 alkyl group optionally substituted with one or more fluorine atoms;

Rf 2 is a C 1-6 alkylene group optionally substituted with one or more fluorine atoms;

R F is each independently at each occurrence a group represented by formula:

—(OC 6 F 12 ) a —(OC 5 F 10 ) b —(OC 4 F 8 ) c —(OC 3 R Fa 6 ) d —(OC 2 F 4 ) e —(OCF 2 ) f —

a, b, c, d, e, and f are each independently an integer of 0 to 200, and the sum of a, b, c, d, e, and f is 1 or more, and the occurrence order of each repeating unit enclosed in parentheses provided with a, b, c, d, e, or f is not limited in the formula;

R Fa is each independently at each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom;

p is 0 or 1;

q is independently 0 or 1;

X is each independently at each occurrence a group represented by the following formula:

—R z1 —O—R z2 —

R z1 is each independently at each occurrence a group represented by —(CH 2 ) z1 —;

R z2 is each independently at each occurrence —(CH 2 ) z2 -optionally substituted with a C 1-6 alkyl group or a cyclic alkyl group optionally containing one or more nitrogen atoms, oxygen atoms, sulfur atoms, or silicon atoms, or with a perfluoroalkyl group;

z1 is each independently at each occurrence an integer of 0 to 20;

z2 is each independently at each occurrence an integer of 0 to 20;

R Si is each independently at each occurrence a group represented by the following formula:

—SiR a1 2 R b1   (S1)

R a1 is —Z 1 —SiR 22 q1 R 23 r1 ;

Z 1 is each independently at each occurrence a C 1-6 alkylene group, —(CH 2 ) z11 —O—(CH 2 ) z12 —, or —(CH 2 ) z13 -phenylene-(CH 2 ) z14 —;

z11 is an integer of 0 to 6;

z12 is an integer of 0 to 6;

z13 is an integer of 0 to 6;

z14 is an integer of 0 to 6;

R 22 is each independently at each occurrence a hydroxyl group or a hydrolyzable group;

R 23 is each independently at each occurrence a hydrogen atom or a monovalent organic group;

q1 is each independently at each occurrence an integer of 1 to 3;

r1 is each independently at each occurrence an integer of 0 to 2; and

R b1 is a C 1-6 alkyl group.

2 . The fluoropolyether group-containing compound according to claim 1 , wherein z1 is each independently at each occurrence an integer of 1 to 20, and z2 is each independently at each occurrence an integer of 1 to 20.

3 . The fluoropolyether group-containing compound according to claim 1 , wherein Z 1 is each independently at each occurrence a C 1-6 alkylene group.

4 . The fluoropolyether group-containing compound according to claim 1 , wherein q1 is 2 or 3.

5 . The fluoropolyether group-containing compound according to claim 1 , wherein R Fa is a fluorine atom.

6 . The fluoropolyether group-containing compound according to claim 1 , wherein R F is each independently at each occurrence a group represented by formula (f1), (f2), (f3), (f4), or (f5) below:

—(OC 3 F 6 ) d —  (f1)

wherein d is an integer of 1 to 200;

—(OC 4 F 8 ) c —(OC 3 F 6 ) d —(OC 2 F 4 ) e —(OCF 2 ) f —  (f2)

wherein c and d are each independently an integer of 0 or more and 30 or less, e and f are each independently an integer of 1 or more and 200 or less,

the sum of c, d, e, and f is 2 or more, and

the occurrence order of each repeating unit enclosed in parentheses provided with a subscript c, d, e, or f is not limited in the formula;

—(R 6 —R 7 ) g —  (f3)

wherein R 6 is OCF 2 or OC 2 F4,

R 7 is a group selected from OC 2 F 4 , OC 3 F 6 , OC 4 F 8 , OC 5 F 10 , and OC 6 F 12 , or is a combination of two or three groups independently selected from these groups, and

g is an integer of 2 to 100;

—(OC 6 F 12 ) a —(OC 5 F 10 ) b —(OC 4 F 8 ) c —(OC 3 F 6 ) d —(OC 2 F 4 ) e —(OCF 2 ) f —  (f4)

wherein e is an integer of 1 or more and 200 or less, a, b, c, d, and f are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the occurrence order of each repeating unit enclosed in parentheses provided with a, b, c, d, e, or f is not limited in the formula; and

—(OC 6 F 12 ) a —(OC 5 F 10 ) b —(OC 4 F 8 ) c —(OC 3 F 6 ) d —(OC 2 F 4 ) e —(OCF 2 ) f —  (f5)

wherein f is an integer of 1 or more and 200 or less, a, b, c, d, and e are each independently an integer of 0 or more and 200 or less, the sum of a, b, c, d, e, and f is at least 1, and the occurrence order of each repeating unit enclosed in parentheses provided with a, b, c, d, e, or f is not limited in the formula.

7 . The fluoropolyether group-containing compound according to claim 1 , wherein R F has a number average molecular weight of 6,000 to 30,000.

8 . The fluoropolyether group-containing compound according to claim 1 , wherein R F is a group represented by:

—(OC 4 F 8 ) c —(OC 3 F 6 ) d —(OC 2 F 4 ) e —(OCF 2 ) f —  (f2)

wherein c and d are each independently an integer of 0 or more and 30 or less, e and f are each independently an integer of 1 or more and 200 or less,

the sum of c, d, e, and f is 2 or more, and

the occurrence order of each repeating unit enclosed in parentheses provided with a subscript c, d, e, or f is not limited in the formula.

9 . The fluoropolyether group-containing compound according to claim 1 , wherein f is 1 or more and a ratio of e to f is less than 1.0.