Abstract:Nitrile rubber(NBR) with high content acrylonitrile has good oil and heat resistance,but poor low temperature and wear resistance.However,the butadiene rubber(BR) has the excellent low temperature resistance,flexibility,wear resistance and poor oil resistance.It was discussed that the effect of different blending ratio with BNR and BR on the mechanical properties and heat resistance,low temperature resistance and oil resistance of coat-metal sealing gasket.The results showed that the comprehensive properties of the NBR/BR blends at the ratio of 85/15 to 90/10 with a certain amount of plasticizer were superior to the NBR and BR,and the low temperature was greatly improved.Meanwhile,the brittleness temperature of blends was less than-50 ℃with decreasing of costs.