METHOD FOR PRODUCING DIHYDROXYBENZENE TYPE NOVOLAK RESIN, EPOXY RESIN COMPOSITION AND CURED MATERIAL THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a dihydroxybenzene type novolak resin, with which unreacted a dihydroxybenzene in the obtained resin are efficiently separated without causing clogging, etc., of transportation line in the production and the amount of the unreacted dihydroxy benzenes remaining in the resin is reduced.;SOLUTION: This method for producing a dihydroxybenzene type novolak resin comprises reacting a dihydroxybenzene (A) with an aldehyde (B) in the presence of an acid or a base (C) and removing the unreacted dihydroxybenzene (A) in the presence of a glycol or a glycol ether (D).;COPYRIGHT: (C)2003,JPO