POLYHYDRIC HYDROXY RESIN, EPOXY RESIN, PRODUCTION METHOD THEREOF, EPOXY RESIN COMPOSITION, AND CURED PRODUCT THEREOF

摘要

PROVIDED ARE AN EPOXY RESIN, A POLYHYDRIC HYDROXY RESIN, AND A COMPOSITION THEREOF THAT PRODUCES A CURED PRODUCT OF EXCELLENT FLAME RETARDANCY, EXCELLENT MOISTURE RESISTANCE, AND LOW ELASTICITY AND IS SUITABLE FOR USE IN ENCAPSULATING ELECTRONIC PARTS, CIRCUIT BOARD MATERIALS, AND THE LIKE. DISCLOSED IS A STYRENE-MODIFIED POLYHYDRIC HYDROXY RESIN THAT IS PRODUCED BY REACTING 0.3 TO 1.0 MOLE OF A STYRENE WITH 1 MOLE OF A PHENOL NOVOLAC IN THE PRESENCE OF AN ACID CATALYST AND CONTAINS A MONOHYDRIC HYDROXY COMPOUND AS A BY-PRODUCT IN AN AMOUNT OF 3% OR LESS BY AREA WHEN DETECTED BY GEL PERMEATION CHROMATOGRAPHY. DISCLOSED FURTHER ARE AN EPOXY RESIN THAT IS PRODUCED BY REACTING THE STYRENE-MODIFIED POLYHYDRIC HYDROXY RESIN WITH EPICHLOROHYDRIN AND AN EPOXY RESIN COMPOSITION THAT COMPRISES THE STYRENE-MODIFIED POLYHYDRIC HYDROXY RESIN OR THE EPOXY RESIN AS AN ESSENTIAL COMPONENT.