Fluorinated ether compound, fluorinated ether composition, coating liquid and article

1. A fluorinated ether compound represented by the following formula (1):

A 1 -O-Q 1 -(R f11 O) m1 —R f12 —R 11 —N[—R 12 —SiR 13 n1 X 1 3-n1 ] 2   (1)

wherein

A 1 is a C 1-20 perfluoroalkyl group,

Q 1 is a single bond, a fluoroalkylene group containing at least one hydrogen atom, a fluoroalkylene group containing at least one hydrogen atom and having an etheric oxygen atom at its terminal other than the terminal on the side bonded to A 1 -O, a fluoroalkylene group with at least two carbon atoms containing at least one hydrogen atom and having an etheric oxygen atom between its carbon-carbon atoms, or a fluoroalkylene group with at least two carbon atoms containing at least one hydrogen atom and having an etheric oxygen atom between its carbon-carbon atoms and at its terminal other than the terminal on the side bonded to A 1 -O,

R f11 and R f12 are each independently a perfluoroalkylene group,

m1 is an integer of from 2 to 200,

(R f11 O) m1 is composed of one type of R f11 O or at least two types of R f11 O,

R 11 is a single bond, an alkylene group, an alkylene group having an etheric oxygen atom or —NH— at its terminal other than the terminal on the side bonded to N, an alkylene group with at least two carbon atoms having an etheric oxygen atom or —NH— between its carbon-carbon atoms, or an alkylene group with at least two carbon atoms having an etheric oxygen atom or —NH— between its carbon-carbon atoms and at its terminal other than the terminal on the side bonded to N,

R 12 is an alkylene group, or an alkylene group with at least two carbon atoms having an etheric oxygen atom or —NH— between its carbon-carbon atoms,

R 13 is a hydrogen atom or a monovalent hydrocarbon group,

X 1 is a hydrolyzable group,

n1 is an integer of from 0 to 2, and

two [—R 12 —SiR 13 n1 X 1 3-n1 ] groups are the same or different from each other.

2. The fluorinated ether compound according to claim 1 , wherein R f11 and R f12 are each independently a C 1-6 perfluoroalkylene group.

3. The fluorinated ether compound according to claim 1 , wherein R f11 and R f12 are each independently a perfluoroalkylene group having no branched structure.

4. The fluorinated ether compound according to claim 1 , wherein (R f11 O) m1 has {(CF 2 O) x1 (CF 2 CF 2 O) x2 } where (wherein each of x1 and x2 is an integer of at least 1 and x1+x2 is an integer of at least 2 and at most m1, and wherein the formula {(CF 2 O) x1 (CF 2 CF 2 O) x2 } represents a structure in which x1 pieces of (CF 2 O) and x2 pieces of (CF 2 CF 2 O) are randomly arranged.

5. The fluorinated ether compound according to claim 1 , wherein (R f11 O) m1 has (CF 2 CF 2 O—CF 2 CF 2 CF 2 CF 2 O) x3 where x3 is an integer of at least 1 and at most m1/2.

6. The fluorinated ether compound according to claim 1 , wherein Q 1 is a single bond, —R 5 O— or —R f5 O—R f6 O—, where R f5 and R f6 are each independently a C 2-6 fluoroalkylene group having a hydrogen atom.

7. The fluorinated ether compound according to claim 1 , wherein R 11 is a group selected from the group consisting of —CH 2 —, —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 OCH 2 CH 2 — and —CH 2 NHCH 2 CH 2 —.

8. The fluorinated ether compound according to claim 1 , wherein R 12 is —CH 2 CH 2 CH 2 — or —CH 2 CH 2 OCH 2 CH 2 CH 2 —.

9. The fluorinated ether compound according to claim 1 , which has a number average molecular weight of from 500 to 20,000.

10. A fluorinated ether composition, comprising:

a fluorinated ether compound of claim 1 ; and

a second fluorinated ether compound other than the fluorinated ether compound,

wherein a total amount of the fluorinated ether compound and the second fluorinated ether compound in the fluorinated ether composition is from 80 to 100 mass % with respect to a mass of the fluorinated ether composition, and

an amount of the second fluorinated ether compound is more than 0 mass % and less than 40 mass % with respect the total amount of the fluorinated ether compound and the second fluorinated ether compound.

11. The fluorinated ether composition according to claim 10 , wherein the second fluorinated ether compound is at least one member selected from the group consisting of:

Fluorinated ether compound (2): A fluorinated ether compound wherein in the fluorinated ether compound represented by the formula (1), a group having —N[—R 12 —SiR 13 n1 X 1 3-n1 ] 2 is bonded to both sides of (R f11 O) m1 ,

Fluorinated ether compound (3): A fluorinated ether compound wherein in the fluorinated ether compound represented by the formula (1), a group having A 1 is bonded to both sides of (R f11 O) m1 , and

Fluorinated ether compound (4): A fluorinated ether compound wherein in the fluorinated ether compound represented by the formula (1), —N[—R 12 —SiR 13 n1 X 1 3-n1 ] 2 is substituted by —N[—R 12 —SiR 13 n1 X 1 3-n1 ] 2-t [—R 15 ] t , where R 15 is an unsaturated bond-containing group which becomes —R 12 —SiR 13 n1 X 1 3-n1 by addition of HSiR 13 n1 X 1 3-n1 , or an isomer group of the unsaturated bond-containing group, and t is 1 or 2.

12. A coating liquid, comprising:

the fluorinated ether compound of claim 1 ; and

a liquid medium.

13. A coating liquid, comprising:

the fluorinated ether composition of claim 10 ; and

a liquid medium.

14. An article having a surface layer comprising the fluorinated ether compound of claim 1 .

15. An article having a surface layer formed of the fluorinated ether composition of claim 10 .

16. The fluorinated ether compound according to claim 1 , wherein R 11 is an alkylene group, an alkylene group having an etheric oxygen atom or —NH— at its terminal other than the terminal on the side bonded to N, an alkylene group with at least two carbon atoms having an etheric oxygen atom or —NH— between its carbon-carbon atoms, or an alkylene group with at least two carbon atoms having an etheric oxygen atom or —NH— between its carbon-carbon atoms and at its terminal other than the terminal on the side bonded to N.