POLYPHENOL RESIN, PROCESS FOR ITS PRODUCTION, EPOXY RESIN COMPOSITION AND ITS USE
摘要
<p>The invention aims at providing an epoxy resin composition which is excellent in flexibility and capable of forming thin film and can give flame-retardant products of curing. The invention is characterized by a polyphenol compound which is prepared by condensing phenol with bischloro- methylbiphenyl (BCMB) or bismethoxymethylbiphenyl, removing unreacted phenol from the reaction mixture, and then reacting the resulting system with BCMB again and has a weight-average molecular weight of 3000 or above as determined by GPC; and use of the polyphenol compound as a curing agent for epoxy resins.</p>
