Patent ID: 7276563

Claim:
A sealing epoxy resin composition containing as ingredients an epoxy resin, a curing agent, an inorganic filler and a polyphenylene ether oligomer compound having a number average molecular weight of 700 to 3,000 and having an epoxy group at each terminal, represented by the formula (9), wherein —(O—X—O)— is represented by the formula (2): in which R 1 , R 2 , R 7 and R 8 are the same or different and are a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, R 3 , R 4 , R 5 and R 6 are the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group and A is a linear, branched or cyclic hydrocarbon having 20 or less carbon atoms or an aromatic group, —(Y—O)— is represented by the formula (3): in which R 9 and R 10 are the same or different and are a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group and R 11 and R 12 are the same or different and are a hydrogen atom, a halogen atom, an alkyl group having 6 or less carbon atoms or a phenyl group, —(Y—O)— is an arrangement of one kind of structure defined by the formula (3) or a random arrangement of two or more kinds of structures defined by the formula (3), Z is an organic group which has one or more carbon atoms and optionally contains an oxygen atom, each of a and b is 0 or an integer of 1 to 20, provided that at least either a or b is not 0, each of c and d is 0 or an integer of 1 to 20, provided that at least either c or d is not 0, and j is 0 or an integer of 1 to 5 and each of i is independently 0 or an integer of 1.