Thermosetting resin composition, prepreg, laminate and multilayer printed wiring board

1. A thermosetting resin composition comprising:

(A) a polyphenylene ether derivative having an N-substituted maleimide structure-containing group and a structural unit represented by the following general formula (I) in one molecule,

(B) at least one thermosetting resin selected from the group consisting of an epoxy resin, a cyanate resin and a maleimide compound, and

(C) a phosphorus flame retardant:

wherein R 1 each independently represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, and x represents an integer of 0 to 4.

2. The thermosetting resin composition according to claim 1 , wherein the N-substituted maleimide structure-containing group is a group represented by the following general formula (Z):

wherein R 2 each independently represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, y represents an integer of 0 to 4, and A 1 represents a group represented by the following general formula (II), (III), (IV) or (V):

wherein R 3 each independently represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, and p represents an integer of 0 to 4:

wherein R 4 and R 5 each independently represent an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, A 2 represents an alkylene group having 1 to 5 carbon atoms, an alkylidene group having 2 to 5 carbon atoms, an ether group, a sulfide group, a sulfonyl group, a carbonyloxy group, a keto group, a single bond, or a group represented by the following general formula (III-1), and q and r each independently represent an integer of 0 to 4:

wherein R 6 and R 7 each independently represent an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, A 3 represents an alkylene group having 1 to 5 carbon atoms, an isopropylidene group, an ether group, a sulfide group, a sulfonyl group, a carbonyloxy group, a keto group or a single bond, and s and t each independently represent an integer of 0 to 4:

wherein n represents an integer of 0 to 10:

wherein R 8 and R 9 each independently represent a hydrogen atom, or an aliphatic hydrocarbon group having 1 to 5 carbon atoms, and u represents an integer of 1 to 8.

3. The thermosetting resin composition according to claim 1 , wherein the structural unit represented by the general formula (I) is a structural unit represented by the following formula (I′):

4. The thermosetting resin composition according to claim 2 , wherein A 1 in the general formula (Z) is a group represented by any of the following formulae:

5. The thermosetting resin composition according to claim 1 , wherein the phosphorus flame retardant (C) is at least one selected from an aromatic phosphate, and a metal salt of a disubstituted phosphinic acid.

6. The thermosetting resin composition according to claim 5 , wherein the aromatic phosphate is represented by the following general formula (C-1) or (C-2), and the metal salt of a disubstituted phosphinic acid is represented by the following general formula (C-3):

wherein R C1 to R C5 each independently represent an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, A c represents an alkylene group having 1 to 5 carbon atoms, an alkylidene group having 2 to 5 carbon atoms, an ether group, a sulfide group, a sulfonyl group, a carbonyloxy group, a keto group, or a single bond, e and f each independently represent an integer of 0 to 5, g, h and i each independently represent an integer of 0 to 4,

R C6 and R C7 each independently represent an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or an aromatic hydrocarbon group having 6 to 14 carbon atoms, M represents a lithium atom, a sodium atom, a potassium atom, a calcium atom, a magnesium atom, an aluminum atom, a titanium atom or a zinc atom, and m1 represents an integer of 1 to 4.

7. The thermosetting resin composition according to claim 1 , wherein the maleimide compound as the component (B) is a polymaleimide compound (a) having at least two N-substituted maleimide groups in one molecule, or a polyaminobismaleimide compound (c) represented by the following general formula (VI):

wherein A 4 has the same definition as that of A 1 in the general formula (Z), and A 5 represents a group represented by the following general formula (VII):

wherein R 17 and R 18 each independently represent an aliphatic hydrocarbon group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, a hydroxyl group or a halogen atom, A 8 represents an alkylene group having 1 to 5 carbon atoms, an alkylidene group having 2 to 5 carbon atoms, an ether group, a sulfide group, a sulfonyl group, a carbonyloxy group, a keto group, a fluorenylene group, a single bond, or a group represented by the following general formula (VII-1) or (VII-2), and q′ and r′ each independently represent an integer of 0 to 4:

wherein R 19 and R 20 each independently represent an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, A 9 represents an alkylene group having 1 to 5 carbon atoms, an isopropylidene group, an m-phenylenediisopropylidene group, a p-phenylenediisopropylidene group, an ether group, a sulfide group, a sulfonyl group, a carbonyloxy group, a keto group or a single bond, and s′ and t′ each independently represent an integer of 0 to 4:

wherein R 21 represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, or a halogen atom, A 10 and A 11 each independently represent an alkylene group having 1 to 5 carbon atoms, an isopropylidene group, an ether group, a sulfide group, a sulfonyl group, a carbonyloxy group, a keto group, or a single bond, and w represents an integer of 0 to 4.

8. The thermosetting resin composition according to claim 1 , wherein the content ratio of the component (A) to the component (B) [(A)/(B)] is from 5/95 to 80/20 by mass.

9. The thermosetting resin composition according to claim 1 , further comprising an inorganic filler (D).

10. The thermosetting resin composition according to claim 1 , further comprising a curing accelerator (E).

11. The thermosetting resin composition according to claim 1 , further comprising an organic solvent.

12. A prepreg comprising the thermosetting resin composition of claim 1 and a sheet-form fiber reinforced substrate.

13. A laminate comprising the prepreg of claim 12 and a metal foil.

14. A multilayer printed wiring board comprising the prepreg of claim 12 .

15. A multilayer printed wiring board comprising the laminate of claim 13 .

16. A method for forming a laminate, comprising:

arranging a metal foil on one surface or both surfaces of at least one prepreg according to claim 12 ; and thereafter

molding the resultant structure under heat and pressure.

17. The method according to claim 16 , wherein the metal foil comprises copper, gold, silver, nickel, platinum, molybdenum, ruthenium, aluminum, tungsten, iron, titanium, or chromium, or an alloy containing at least one of copper, gold, silver, nickel, platinum, molybdenum, ruthenium, aluminum, tungsten, iron, titanium, or chromium.

18. The method according to claim 16 , wherein molding the resultant structure under heat and pressure is performed at a temperature of 100° C. to 300° C., and a pressure of 0.2 to 10.0 MPa for 0.1 to 5 hours.