Curing agent for epoxy resin, epoxy resin composition and method for preparing siloxane-modified phenol resin

摘要

The present invention provides a curing agent for epoxy resin containing a siloxane-modified phenol resin (3) obtained by dealcoholization condensation reaction between a phenol resin (1) and a hydrolyzable alkoxysilane (2). The present invention further provides an epoxy resin composition comprising an epoxy resin and the above-mentioned curing agent for epoxy resin. The present invention further provides a method for preparing a siloxane-modified phenol resin (3) characterized by subjecting a phenol resin (1) and a hydrolyzable alkoxysilane (2) to dealcoholization condensation reaction.