Patent ID: 6512075
Filing Date: 2003-01-28
Classification: C08G,C08L,H05K

Abstract:
A high Tg brominated epoxy resin for a glass fiber laminate, which is characterized in forming with (A) multifunctional phenol-benzaldehyde epoxy resin (formula 1.) 10Ëœ70 weight %, (B) difunctional epoxy resin 0Ëœ55 weight %, (C) difunctional bromine-containing epoxy resin 0Ëœ20 weight % and (D) tetrabromobisphenol-A 15Ëœ40 weight %, then taking (D) to react with at least one of (A), (B) and (C), and then added with the rest of (A), (B) and (C), and mixing well to obtain brominated epoxy resin with average molecular weight (Mw) of 1500Ëœ4000, dispersive index in molecular weight of 1.5Ëœ4.0 (Mw/Mn), epoxy equivalent weight (EEW) of 300Ëœ450 g/eq, and glass Tg of 150Ëœ190Â° C.