Epoxy resins, their preparation, and use

摘要

Epoxy resins (I) (claimed), contains bisphenol cpds. in which at least one of the aromatic rings is substd. with linear or branched opt. substd. alkylene with at least one aryl gp.. Also claimed are: (i) a two-stage process for the prodn. of modified epoxy resins by (a) reacting a bis-phenol with an alkenyl-aromatic cpd. in presence of a weak acid, opt. adding more of the same or another bisphenol and (b) reacting with an epoxide; (ii) a one-stage process for the prodn. of modified epoxy resins by reacting a mixt. of aralkylated and non-aralkylated bisphenols with an epoxide; (iii) modified epoxy resins obtd. by these processes.