Diepoxy compound, process for producing same, and composition containing the diepoxy compound

A process for producing a diepoxy compound represented by the formula (1)

• wherein R1, R2, R3 and R4 independently each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, comprising reacting a dihydroxy compound represented by the formula (2)
• wherein R1, R2, R3 and R4 are the same meaning as defined above, with an epihalohydrin represented by the formula (3)
• wherein X1 represents a halogen atom, in the presence of an ammonium salt and an inorganic base.

A dihydroxy compound represented by the formula (2)

• wherein R1, R2, R3 and R4 independently each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.

A process for producing a dihydroxy compound represented by the formula (2)

• wherein R1, R2, R3 and R4 independently each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, comprising reacting a compound represented by the formula (5)
• wherein R1, R2, R3 and R4 are the same meaning as defined above, with a compound represented by the formula (6)
• in the presence of an acid.

A composition containing a diepoxy compound represented by the formula (1)

• wherein R1, R2, R3 and R4 independently each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and a curing agent.

A composition containing a diepoxy compound represented by the formula (1)

• wherein R1, R2, R3 and R4 independently each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, a curing agent and alumina.