PRODUCTION OF HIGHLY REACTIVE MODIFIED PHENOL RESIN, MOLDING MATERIAL, MATERIAL FOR ELECTRIC AND ELECTRONIC PART AND SEMICONDUCTOR SEALING MATERIAL CONTAINING THE SAME HIGHLY REACTIVE MODIFIED PHENOL RESIN

摘要

PROBLEM TO BE SOLVED: To produce the subject resin having a low melt viscosity and high reactivity with an epoxy resin by carrying out the polycondensation of petroleum-based heavy oils, etc., with a resol resin in the presence of an acidic catalyst. ;SOLUTION: The polycondensation of (A) petroleum-based heavy oils or pitches, as necessary, subjected to a treatment for removing a paraffin fraction with (B) a resol resin is carried out in the presence of (C) an acidic catalyst which is preferably a Broensted acid selected from an organic acid, an inorganic acid and a solid acid to provide the objective resin. The rations of the components (A), (B) and (C) used are preferably regulated so as to provide 0.2-2mol component B, expressed in terms of the average molecular weight and based on 1mol component (A) calculated from the average molecular weight and 0.3-3mol component (C) based on 1mol component (A). The resultant resin is preferably purified in at least one step selected from, e.g. a step of removing a catalyst residue and then preferably used for various applications.;COPYRIGHT: (C)1998,JPO