EBR vulcanizates that epoxide number is about 20% might as a kind of new type gas proofness rubber ,because its comprehensive properties approachs BR, and its gas permeability approachs IIR and less than BR greatly.

• 环氧值为20%25左右的EBR硫化胶的综合性能接近BR，而气密性大大好于BR，接近IIR，可以作为新型气密胶种。