These resins are the condensation product of 2,2-bis(3,5-
dibromo-4-hydroxyphenyl) propane and epichlorohydrin.
Bromine has been incorporated into BADGE-type resins
to increase the ignition resistance of such resins by the use
of tetrabrominated bisphenol A for the synthesis of the
glycidyl ethers. Because bromine substitution reduces
the thermal stability of the resins, the products are usually
used with or condensed with bisphenol A. They therefore
contain less than the theoretical amount of bromine indicated
by the chemical formula (18–48% Br). Brominated epoxy
resins are used as reactive flame retardants and are applied in
electrical and electronics parts and equipment.
