| 摘要 |
PROBLEM TO BE SOLVED: To obtain a conductive rubber compsn. with uniform resistance, excellent ozone resistance, low hardness and excellent formability by mixing an acrylonitrile-butadiene rubber containing a specified amt. of acrylonitrile and an epichlorohydrin rubber containing a specified amt. of ethylene oxide in a specified mixing ratio. SOLUTION: The compsn. contains an acrylonitrile-butadiene rubber containing 18 to 40 wt.% acrylonitrile and having 30 to 60 Mooney viscosity at 100 deg.C, and an epichlorohydrin rubber containing 10 to 40 mol.% ethylene oxide in 80:20 to 20:80 weight ratio of mixing. NBR and ECO are compounded in the conductive rubber compsn. by generally 30 to 80 wt.% in total to the whole rubber compsn., and preferably by 50 to 70 wt.%. Moreover, a conductive filler is preferably compounded in the conductive rubber compsn. to decrease the resistance and to control the resistance. |
