Patent ID: 6534601
Filing Date: 2003-03-18
Classification: C08G,H05K

Abstract:
A flame retardant epoxy resin modified with phosphorus and silicon prepared by reacting one or more epoxy resins selected from a group consisting of bisphenol A epoxy resins, bisphenol F epoxy resins, bisphenol S epoxy resins, bisphenol M epoxy resins and bisphenol AD epoxy resins with a compound having a structure represented by the following formula 1: and then reacting the phosphorus-modified epoxy resin with a compound having a structural unit represented by the following formula 3: (in which x, y and z are independently 0, 1, or 2) wherein the epoxy resin modified with phosphorus and silicon contains 2.0 wt % to 3.2 wt % of phosphorus and 0.5 wt % to 2.2 wt % of silicon.