Fluoropolyether group-including compound
A fluoropolyether group-containing compound of formula (1) or (2): wherein R F1 , R X1 , R X2 and R Si are as defined herein.
1. A composition containing a fluoropolyether group-containing compound of formula (1) and a fluoropolyether group-containing compound of formula (2) below:
wherein
R F1 is R f1 -R F -O q —;
R F2 is-R f2 p -R F -O q —;
R f1 is a C 1-16 alkyl group optionally substituted with one or more fluorine atoms;
R f2 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;
R X1 is each independently at each occurrence a C 1-6 alkylene group;
R X2 is each independently at each occurrence a C 1-6 alkylene group optionally substituted with a C 1-6 alkyl group or cyclic alkyl group optionally containing one or more nitrogen atoms, oxygen atoms, sulfur atoms, or silicon atoms, or with a perfluoroalkyl group;
R Si is each independently at each occurrence represented by formula (S1) below:
-X 1 -SiR a1 p1 R b1 q1 R c1 r1 (S1)
X 1 is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
R a1 is each independently at each occurrence -Z 1′ -SiR a1′ p1′ R b1′ q1′ R c1′ r1′ ;
Z 1′ is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
R a1′ is each independently at each occurrence -Z 1′ -SiR a1′ p1′ R b1′ q1′ R c1′ r1′ ;
Z 1′ is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
R a1′ is each independently at each occurrence -Z 1″ -SiR a1″ p1″ SiR b1″ q1″ -R c1″ r1″ ;
Z 1′″ is each independently at each occurrence a single bond, an oxygen atom, or a divalent organic group;
R b1′″ is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
R c1′″ is each independently at each occurrence a hydrogen atom or a monovalent organic group;
q 1′″ is each independently at each occurrence an integer of 0 to 3;
r 1′″ is each independently at each occurrence an integer of 0 to 3;
R b1″ is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
R c1″ is each independently at each occurrence a hydrogen atom or a monovalent organic group;
p 1″ is each independently at each occurrence an integer of 0 to 3;
q 1″ is each independently at each occurrence an integer of 0 to 3;
r 1″ is each independently at each occurrence an integer of 0 to 3;
R b1′ is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
R c1′ is each independently at each occurrence a hydrogen atom or a monovalent organic group;
p 1′ is each independently at each occurrence an integer of 0 to 3;
q 1′ is each independently at each occurrence an integer of 0 to 3;
r 1′ is each independently at each occurrence an integer of 0 to 3;
R b1 is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
R c1 is each independently at each occurrence a hydrogen atom or a monovalent organic group;
p 1 is each independently at each occurrence an integer of 0 to 3;
q 1 is each independently at each occurrence an integer of 0 to 3;
r 1 is each independently at each occurrence an integer of 0 to 3; and
at least one R b1 , R b1′ , R b1″ , or R b1′″ is present for each group represented by R Si .
2. The composition according to claim 1 , wherein p 1 is 0, and q 1 is 2 or 3.
3. The composition according to claim 1 , wherein R Fa is a fluorine atom.
4. The composition according to claim 1 , wherein X 1 is each independently at each occurrence a divalent organic group.
5. The composition according to claim 1 , wherein X 1 is each independently at each occurrence -(Z 21 ) z11 -(X 2 ) z12 -(Z 22 ) z13 -
wherein Z 21 and Z 22 are a divalent organic group;
X 2 is an oxygen atom;
z11 is 0 or 1;
z12 is 0 or 1;
z13 is 0 or 1; and
at least one of z11 and z13 is 1.
6. The composition according to claim 1 , wherein X 1 is each independently at each occurrence an alkylene group.
7. The composition according to claim 1 , wherein a molar ratio of the fluoropolyether group-containing compound of formula (2) to a total of the fluoropolyether group-containing compounds of formulae (1) and (2) contained in the composition is 0.001 to 0.35.