Thermosetting resin composition, laminated body using it, and circuit board

1. A thermosetting resin composition comprising an imide oligomer component (A) comprising at least one imide oligomer represented by general formula (1):

(wherein R 1 s may be the same or different; R 2 s may be the same or different, and each R 2 s represents a divalent organic group containing at least two aromatic rings; R 3 s may be the same or different, and each R 3 s represents a monovalent organic group selected from —OH and —NH 2 ; R 4 s may be the same or different, and each R 4 s represents a tetravalent organic group containing at least one aromatic ring; V represents a direct bond or a divalent group selected from the group consisting of —O—, —CO—, —O-T-O—, —COO-T-OCO—, —C(CH 3 ) 2 —, and —C(CF 3 ) 2 —; T represents a divalent organic group; a and b independently represent an integer of 0 to 15; a+b represents an integer of 0 to 15; and the compound represented by general formula (1) may be a block copolymer or a random copolymer)

or general formula (2):

(wherein R 1 s may be the same or different; R 2 s may be the same or different, and each R 2 s represents a divalent organic group containing at least two aromatic rings; R 3 s may be the same or different, and each R 3 s represents a monovalent organic group selected from —OH and —NH 2 ; R 4 s may be the same or different, and each R 4 s represents a tetravalent organic group containing at least one aromatic ring; V represents a direct bond or a divalent group selected from the group consisting of —O—, —CO—, —O-T-O—, —COO-T-OCO—, —C(CH 3 ) 2 —, and —C(CF 3 ) 2 —; T represents a divalent organic group; c is an integer of 1 to 15; d is an integer of 0 to 15; c+d is an integer of 1 to 15; and the compound represented by general formula (2) may be a block copolymer or a random copolymer); and an epoxy resin component (B) comprising at least one epoxy resin;

wherein each R 1 represents

a divalent organic group selected from the group consisting of the following:

general formula (6):

wherein each X independently represents a divalent group selected from the group consisting of —C(═O)—, —SO 2 —, —O—, —S—, —(CH 2 ) L —, —NHCO—, —C(CH 3 ) 2 —, —C(CF 3 ) 2 —, and —C(═O)O—, or a direct bond; each R 5 independently represents —OH, —NH 2 , hydrogen, halogen, or an alkyl group having 1 to 4 carbon atoms; and L and s independently are an integer of 0 to 5.

2. The thermosetting resin composition according to claim 1 , further comprising a polyimide resin component (C) containing at least one polyimide resin.

3. The thermosetting resin composition according to claim 2 , wherein the mixing ratio by weight of the weight of the polyimide resin component (C) to the total weight of the imide oligomer component (A) and the epoxy resin component (B), (C)/[(A)+(B)], is in the range of 0.1 to 2.0.

4. The thermosetting resin composition according to claim 1 , wherein the molar ratio of the number of moles of active hydrogen groups contained in the imide oligomer component (A) to the number of moles of the epoxy groups contained in the epoxy resin component (B), (A)/(B), is in the range of 0.4 to 2.0.

5. The thermosetting resin composition according to claim 1 , wherein the weight-average molecular weight of the imide oligomer component (A) is 15,000 or less.

6. A laminate comprising at least one resin layer comprising the thermosetting resin composition according to claim 1 .

7. A circuit board comprising the thermosetting resin composition according to claim 1 .

8. The thermosetting resin composition according to claim 2 , wherein the molar ratio of the number of moles of active hydrogen groups contained in the imide oligomer component (A) to the number of moles of the epoxy groups contained in the epoxy resin component (B), (A)/(B), is in the range of 0.4 to 2.0.

9. The thermosetting resin composition according to claim 3 , wherein the molar ratio of the number of moles of active hydrogen groups contained in the imide oligomer component (A) to the number of moles of the epoxy groups contained in the epoxy resin component (B), (A)/(B), is in the range of 0.4 to 2.0.

10. The thermosetting resin composition according to claim 2 , wherein the weight-average molecular weight of the imide oligomer component (A) is 15,000 or less.

11. The thermosetting resin composition according to claim 3 , wherein the weight-average molecular weight of the imide oligomer component (A) is 15,000 or less.

12. The thermosetting resin composition according to claim 4 , wherein the weight-average molecular weight of the imide oligomer component (A) is 15,000 or less.