Patent ID: 8039560

Claim:
A process for the preparation of a brominated epoxy resin with a symmetric or saturated heterocyclic alphatic molecular structure, wherein the process includes the following steps: (i) 2,6-substituted symmetric monophenol compound (A) is reacted with an aldehyde compound or a cyclodiene compound (B) at the presence of an acidic catalyst to form a bisphenol type phenol-aldehyde compound (C) with a symmetrical structure or saturated ring structure; (ii) an epoxidation is carried out by reacting the resulted bisphenol type phenol-aldehyde compound (C) with epichlorohydrin to form a phenol-aldehyde epoxy resin (D); and (iii) the phenol-aldehyde epoxy resin (D) is reacted with a bromine containing phenolic compound (E) to produce a brominated epoxy resin (F).