| 摘要 |
PURPOSE:To obtain the title composition undergoing a minimum change in resistance near the service temperature by using a compound of any one of the group II-IV elements as a filler. CONSTITUTION:An objective composition preferably comprises 100 pts.wt. crystalline polymer, 50-150 pts.wt. carbon black especially having an oil absorption of at least 50cc/100g, and 3-100 pts.wt. filler which comprises a compound of any one of the group II-IV elements [e.g. MgO, Mg(OH), fired clay (aluminum silicate), ZnO, fired SiO2, TiO2, ZrO2, zirconium silicate, barium titanate or barium sulfate] and which contains at most 500ppm impurities. |
