Multifunctional nitrileoxide compound

1. A compound of the formula (I):

wherein:

R 2 and R 3 represent each independently a hydrogen atom or a hydrocarbon group;

A represents an s-valent organic group; and

s is an integer of 2-10.

2. The compound as claimed in claim 1 wherein s is 2 or 3.

3. The compound as claimed in claim 1 which is represented by the formula (II):

wherein:

R 2 and R 3 represent each independently a hydrogen atom or a hydrocarbon group; and

R 4 represents a di-valent hydrocarbon group;

provided that each of R 2 , R 3 and R 4 binds to a carbon atom to which a nitrileoxide is attached at a carbon atom thereof.

4. The compound as claimed in claim 1 wherein R 2 and R 3 are each independently a hydrogen atom, or an alkyl group, a cycloalkyl group, a heterocycloalkyl group, an aryl group, a heteroaryl group or a (poly)alkylether group which may have one or more substituents.

5. The compound as claimed in claim 1 wherein at least one of R 2 and R 3 is an aryl group, a tert-alkyl group, a sec-alkyl group or a (poly)alkylether group which may be substituted by one or more substituents.

6. The compound as claimed in claim 3 wherein R 4 is a group of the formula:

—R 4c —R 4b —R 4a —R 4b —R 4c —

wherein:

R 4a represents an alkylene group or a di-valent (poly)alkylether group which may have one or more substituents;

R 4b represents each independently a bond, an oxygen atom, or an alkylene group which may have one or more substituents; and

R 4c represents each independently a bond, or an alkylene group, a cycloalkylene group or an arylene group which may have one or more substituents.

7. The compound as claimed in claim 6 wherein R 4b is —OCO— or —COO—.

8. The compound as claimed in claim 3 wherein R 4 is a group of the formula:

—R 4c —O—R 4a —O—R 4c —

wherein:

R 4a represents an alkylene group or a di-valent (poly)alkylether group which may be substituted by one or more substituents; and

R 4c represents an arylene group.

9. The compound as claimed in claim 1 which is represented by the formula (III):

wherein:

R 7 represents a tri-valent organic group;

R 2 and R 3 represent each independently a hydrogen atom or a hydrocarbon group; and

Link represents a bond or a di-valent group;

provided that each of R 2 , R 3 and Link binds to a carbon atom to which a nitrileoxide is attached at a carbon atom thereof.

10. The compound as claimed in claim 9 wherein Link represents —R 4a —, —R 4b — or —R 4c —, or a group in which two or more of —R 4a —, —R 4b — and —R 4c — are linked:

wherein R 4a represents an alkylene group or a di-valent (poly)alkylether group which may have one or more substituents;

R 4b represents each independently a bond, an oxygen atom, or an alkylene group which may have one or more substituents; and

R 4c represents each independently a bond, or an alkylene group, a cycloalkylene group or an arylene group which may have one or more substituents.

11. The compound as claimed in claim 9 wherein the Link is an oxygen atom, a sulfur atom, an alkylene group, an alkyleneoxy group, an alkylenedioxy group, a carbonyl group, —O—CO—, —CO—O—, —O—CO—O—, —NR—, —C(O)NR—, —NR—CO—NR— (wherein R is a hydrogen atom or an alkyl group or an aryl group which may have one or more substituents), an arylene group, an aryleneoxy group, an arylenedioxy group, or a group in which two or more of them are linked.

12. The compound as claimed in claim 9 wherein R 7 is C(R) (R is a hydrogen atom or an alkyl group which may be substituted by a fluorine atom), a nitrogen atom, an optionally substituted silicon atom, or a tri-valent aromatic ring which may have a heteroatom as a ring member atom.

13. A composition comprising one or more compounds as claimed in claim 1 .

14. A composition for applying to a material containing a group reactive with a nitrileoxide group, which comprises one or more compounds as claimed in claim 1 .

15. The composition as claimed in claim 13 which is a cross-linking agent.

16. The composition as claimed in claim 13 which is a raw material of for a liquid rubber.

17. A composite of two or more compounds which are treated with the cross-linking agent as claimed in claim 15 .

18. A liquid rubber produced by using the composition as claimed in claim 16 .