A comparative test for antidegradant FHD-60 to a ntidegradants A,FHD-40 and MDW was made in NR compound and NR/SBR/BR blend comp ound.

• 在NR胶料和NR/SBR/BR并用胶中 ,采用防老剂A ,FHD(4 0和 6 0 )和MDW进行对比试验。