| 摘要 |
PURPOSE:To obtain the titled composition having excellent heat-resistance and voltage-resistance and suitable for the distributor cap and rotor of an automobile, by adding a small amount of a foaming agent to a composition composed of a polyolefin and mica at a specific ratio. CONSTITUTION:The objective composition is produced by compounding (A) 100pts.wt. of a composition composed of (i) 95-40wt%, preferably 90-40% polyolefin (preferably propylene polymer) and (ii) 5-60%, preferably 10-60% mica [preferably phlogopite of formula K2Mg6(Si3Al)2O20(OH)4 or muscovite of formula K2Al4(Si3Al)2O20(OH)4 and having particle diameter of 1-300mu] with (B) 0.05-0.5pts. of a foaming agent (e.g. azodicarbon-amide). |
