MANUFACTURING METHOD OF A BISPHENOL A NOVOLAC EPOXY RESIN WITH A DISTRIBUTION OF MOLECULAR WEIGHT CONTROLLED THROUGH A CONTENT CONTROL OF MATERIALS WITH LOW MOLECULAR WEIGHT, AND A BISPHENOL A NOVOLAC EPOXY RESIN MANUFACTURED FROM THE SAME

摘要

PURPOSE: A manufacturing method of a bisphenol A novolac epoxy resin is provided to provide a bisphenol A novolac epoxy resin having excellent physical properties like heat resistance, etc and improved workability by reducing a content of materials with low molecular weight and simplifying processes.;CONSTITUTION: A manufacturing method of a bisphenol A novolac epoxy resin comprises: a step of preparing a bisphenol A novolac resin solution by mixing bisphenol A novolac epoxy resin with alcohol solvent, and leaving the solution alone; a step of separating the bisphenol A novolac epoxy resin solution in an upper part, and mixing alcohol solvent to the bisphenol A novolac epoxy resin solution in a lower part again, and leaving the solution alone; and a step of separating the bisphenol A novolac epoxy resin in the upper part, and extracting the bisphenol A novolac epoxy resin solution in the lower part.;COPYRIGHT KIPO 2013