Epoxy resin composition

1. An epoxy resin composition comprising: an epoxy resin (A), a curing agent (B) and a phosphorous-containing compound (C) indicated by the following general formula (1);

wherein m indicates an integer from 2 to 10, R 1 to R 4 each independently indicate a hydrogen atom, an alkyl group or an aryl group, R 5 indicates a hydrocarbon group that may contain an oxygen atom, a sulfur atom or a nitrogen atom, X indicates an oxygen atom or a sulfur atom, Y indicates an oxygen atom, a sulfur atom or —NR 6 —, and R 6 indicates a hydrogen atom, an alkyl group or an aryl group and

either R 1 or R 2 is a hydrogen atom and the other is an alkyl group or aryl group and at the same time, either of R 3 or R 4 is a hydrogen atom and the other is an alkyl group or aryl group.

2. The epoxy resin composition according to claim 1 , wherein X and Y in the aforementioned general formula (1) are both oxygen atoms.

3. The epoxy resin composition according to claim 1 , wherein R 5 in the aforementioned general formula (1) is a hydrocarbon group having one aromatic ring or more than two aromatic rings.

4. The epoxy resin composition according to claim 1 , wherein R 1 to R 4 in the aforementioned general formula (1) are each independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R 5 is a functional group having any of structures selected from the following general formulae (2-1), (2-2), (2-4), (2-5) and (2-6);

wherein R 7 indicates a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 8 indicates a single bond, a methylene group, or —C(CH 3 ) 2 —, and R 9 and R 10 each independently indicate a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,

wherein n indicates an integer from 0 to 3, o indicates an integer from 0 to 50, R 11 indicates a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 12 indicates a hydrocarbon group which may contain an oxygen atom or a sulfur atom, and Z is a hydroxyl group or a functional group indicated by the following general formula (2-3),

wherein R 13 to R 16 each independently indicate a hydrogen atom, or an alkyl group having 1 to 6 carbon atoms,

5. The epoxy resin composition according to claim 4 , wherein the aforementioned R 5 is a functional group indicated by the aforementioned formula (2-1), and the aforementioned R 7 is a hydrogen atom.

6. The epoxy resin composition according to claim 1 , wherein a flame retardant (D) is contained; wherein, said flame retardant (D) is at least one of flame retardants selected from groups comprising an inorganic flame retardant, an aromatic bromine compound and a phosphorous-containing flame retardant except for the phosphorous-containing compound (C).

7. The epoxy resin composition according to claim 6 , wherein the flame retardant (D) is a phosphorous-containing flame retardant that does not contain halogen.

8. A prepreg comprising a sheet-like substrate made of at least one of fibers selected from inorganic fibers and organic fibers, and the epoxy resin composition according to claim 1 .

9. A method for manufacturing an epoxy resin laminated plate, wherein metallic foils are arranged to laminate on at least one surface of a prepreg according to claim 8 or a laminated body obtained by laminating two or more said prepregs, and the thermal compression bonding is carried out.

10. An epoxy resin laminated plate manufactured by the method according to claim 9 .