Thermosetting resin composition containing polymer having specific terminal structure

1. A thermosetting resin composition containing a polymer having a repeating structural unit of the following Formula (1-a):

(wherein each of R 1 and R 2 is independently a hydrogen atom, a C 1-4 alkyl group, phenyl group, or a C 3-6 cyclic alkyl group, X is a single bond or a divalent organic group, and Y is a divalent organic group), and a terminal structure of the following Formula (1-b):

(wherein Q is a C 1-5 alkylene group, phenylene group in which at least one hydrogen atom may be substituted by a halogen atom, or a 5- or 6-membered divalent saturated heterocyclic group containing at least one nitrogen atom, and R 3 is a hydrogen atom or methyl group).

2. The thermosetting resin composition according to claim 1 , wherein if the ratio of a terminal that has the terminal structure of Formula (1-b) in the polymer is defined as a ratio of the amount by mole of an imidazole compound consumed for formation of the terminal structure to the amount by mole of a diamine compound or a bisphenol compound that is a raw material compound for the polymer, the ratio is 1% by mole to 100% by mole.

3. The thermosetting resin composition according to claim 1 , wherein Q in the Formula (1-b) is a C 1-5 alkylene group.

4. The thermosetting resin composition according to claim 1 , wherein in Formula (1-a), X is a divalent organic group containing a C 1-6 alkylene group in which at least one hydrogen atom may be substituted by a halogen atom, a cyclic alkylene group, an arylene group in which at least one hydrogen atom may be substituted by a halogen atom, a sulfonyl group, a carbonyl group, a —O— group, or a —COO— group.

5. The thermosetting resin composition according to claim 1 , wherein in Formula (1-a), X is a divalent organic group of the following Formula (2):

(wherein each of R 4 and R 5 is independently a hydrogen atom or methyl group in which at least one hydrogen atom may be substituted by a halogen atom, and m is 0 or 1).

6. The thermosetting resin composition according to claim 5 , wherein the divalent organic group of Formula (2) is represented by the following Formula (2-a) or Formula (2-b):

7. The thermosetting resin composition according to claim 1 , wherein in Formula (1-a), Y is a divalent organic group of the following Formula (3) or Formula (4):

(wherein T is a single bond, a sulfonyl group, or a —O— group, each of R 7 and R 8 is independently a hydrogen atom or methyl group in which at least one hydrogen atom may be substituted by a halogen atom, two R 6 s are each independently a hydrogen atom, methyl group, ethyl group, or methoxy group, and n is 0 or 1).

8. The thermosetting resin composition according to claim 7 , wherein the divalent organic group of Formula (3) or Formula (4) is represented by the following Formula (3-a), Formula (4-a), or Formula (4-b):

9. The thermosetting resin composition according to claim 1 , wherein the polymer has a weight average molecular weight of 1,000 to 100,000.

10. The thermosetting resin composition according to claim 1 , further comprising an epoxy resin.

11. The thermosetting resin composition according to claim 1 , further comprising a phenolic resin.

12. The thermosetting resin composition according to claim 1 , further comprising a solvent.

13. The thermosetting resin composition according to claim 1 , further comprising a silane coupling agent.

14. The thermosetting resin composition according to claim 1 , further comprising an inorganic filler.

15. The thermosetting resin composition according to claim 1 which is an adhesive composition or an underfill composition.