CURABLE COMPOSITION

1 . A curable composition comprising:

(A) a compound which is a compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule, wherein

the perfluoro(poly)ether group is a group represented by formula:

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

wherein a, b, 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 a, b, c, d, e and f is at least 5 or more, the occurrence order of the respective repeating units in parentheses with the subscript a, b, c, d, e or f is not limited in the formula, a ratio of e to f is less than 1.0, and each X 10 , at each occurrence, is independently a hydrogen atom, a fluorine atom or a chlorine atom;

(B) an organosilicon compound which has two or more hydrogen atoms each bonding to a silicon atom, in one molecule; and

(C) a catalyst.

2 . The curable composition according to claim 1 , wherein

(A) the compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule is a compound represented by formula (I):

CH 2 ═CH—R k1 -PFPE 1 -R k1 —CH═CH 2   (I)

wherein:

each R k1 , at each occurrence, independently represents a single bond or a divalent organic group; and

each PFPE 1 , at each occurrence, independently represents

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

wherein a, b, 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 a, b, c, d, e and f is at least 5 or more, the occurrence order of the respective repeating units in parentheses with the subscript a, b, c, d, e or f is not limited in the formula, a ratio of e to f is less than 1.0, and each X 10 , at each occurrence, is independently a hydrogen atom, a fluorine atom or a chlorine atom.

3 . The curable composition according to claim 1 , wherein a hydrogen atom bonding to a silicon atom in (B) the organosilicon compound which has two or more hydrogen atoms each bonding to a silicon atom, in one molecule, is comprised in the range from 0.5 to 5.0 mol based on 1 mol of an alkenyl group in (A) the compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule.

4 . The curable composition according to claim 1 , wherein (B) the organosilicon compound which has two or more hydrogen atoms each bonding to a silicon atom, in one molecule, has at least one selected from the group consisting of one or more monovalent perfluoroalkyl groups, monovalent perfluorooxyalkyl groups, divalent perfluoroalkylene groups and divalent perfluorooxyalkylene groups, in a molecular structure.

5 . The curable composition according to claim 1 , wherein the catalyst is a transition metal catalyst.

6 . The curable composition according to claim 1 , wherein the catalyst comprises at least one comprising platinum, rhodium, ruthenium, iridium and palladium.

7 . The curable composition according to claim 1 , wherein the catalyst comprises platinum.

8 . The curable composition according to claim 1 , comprising 0.1 to 500 ppm by mass of the catalyst in terms of metal atom relative to (A) the compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule.

9 . The curable composition according to claim 1 , wherein a ratio of the sum of e and f to the sum of a, b, c, d, e and f is 0.80 or more in (A) the compound having two or more alkenyl groups and a perfluoro(poly)ether group in one molecule.

10 . The curable composition according to claim 1 , wherein X 10 is a fluorine atom.