Technical indexes :

Type	EX-20	EX-40
Appearance	Yellow transparent lumpy solid	Yellow clear mucus
Epoxide value (eq/100g)	0.19-0.23/100g	0.38-0.45/100g
Unhydrolytic chlorine (eq/100g)	≤0.001/100g	≤0.001/100g
Hydrolytic chlorine(eq/100g)	≤0.02/100g	≤0.02/100g
Volatile %	≤1%	≤1%
Softening point °C	60-70°C	≤28°C

The bromine-containing epoxy resin is a mixture of a brominated epoxy resin and a non-brominated epoxy resin, the mixture containing at least 25% by weight of the brominated epoxy resin.

The bromine-containing epoxy resins may include a tetra-bromo bisphenol A based epoxy resin, a tetra-bromo bisphenol-A-bisphenol-A epoxy resin, a tetra-bromobisphenol-A-benzene formaldehyde epoxy resin. The amount of bromine contained in the bromine-containing epoxy resin may be 10-50% by weight. The number of the equivalents of the bromine-containing compound is 330-1500, preferably 330-575. The amount of the bromine-containing epoxy resin to be used is 10-50% by weight based on the total weight of the resin composition.