Patent ID: 8084567
Filing Date: 2011-12-27
Classification: C08G,C08L,H01L

Abstract:
1. A method for producing an epoxy resin, which comprises the steps of: reacting a dihydroxynaphthalene compound (a1) with an aralkylating agent (a2) represented by the following Structural formula (2): wherein R 1 and R 2 each independently represents methyl group or hydrogen atom, Ar represents phenylene group, a phenylene group which is nuclear-substituted with 1 to 3 alkyl groups having 1 to 4 carbon atoms, naphthylene group, or a naphthylene group which is nuclear-substituted with 1 to 3 alkyl groups having 1 to 4 carbon atoms, and Y represents a halogen atom, an alkoxy group or hydroxyl group, in the presence of an acid catalyst to obtain a phenol resin having a molecular structure comprising a polyaryleneoxy structure as a main skeleton and a phenolic hydroxyl group and a structural segment represented by the following structural formula (1) being attached to an aromatic ring of the polyaryleneoxy structure, wherein R 1 , R 2 , Ar are as defined in the Structural formula (2), and n represents an average number of repeating units of 0.1 to 4, and reacting the resulting phenol resin with epihalohydrins (a3).