| 摘要 |
PURPOSE:To obtain a rubber composition having low impact resilience used as a rubber vibration insulator for a hard disk of a computer having excellent vibration-insulating characteristics at from room temperature to a high temperature containing butyl rubber as a principal component, reinforcing agent and a phenolic resin. CONSTITUTION:(A) 100 pts.wt. butyl rubber (containing halogenated butyl rubber) is mixed with (B) 30-80 pts.wt. reinforcing agent (preferably carbon black) and (C) 10-40 pts.wt. phenolic resin having 500-1200 number-average molecular weight, preferably alkyl-modified phenolic resin, especially 4-8C alkyl-modified phenolic resin, and further suitable amount of filler, curing agent, curing accelerator and auxiliary, etc., as necessary, to afford the aimed rubber composition having low impact resilience capable of giving a rubber vibration insulator exhibiting excellent vibration-insulating characteristics in a wide range of temperature from about room temperature to a high temperature generating a peak of dissipation factor at about room temperature. |
