| 摘要 |
PROBLEM TO BE SOLVED: To provide an expandable silicone rubber composition which gives a foamed elastic material satisfactorily improved and stabilized in the charge amount and having a cell with a stable size without irregularity, and an electroconductive roll suitable for an electroconductive image-forming member for a toner around a photoreceptor drum by an electrophotographic method. SOLUTION: The expandable silicone rubber composition comprises 100 pts.wt. of a vinyl group-containing silicone rubber compound as a main component, and incorporated therewith, at least, 0.1-30 pts.wt. of a chemical blowing agent, 0.1-10 pts.wt. of an amine-modified silicone oil and an appropriate amount of a vulcanizing agent. The electroconductive roll is obtained by heating the expandable silicone rubber composition thereby to simultaneously cause expansion and hardening. |
