| 摘要 |
PURPOSE:To obtain the titled composition giving high coefficient of friction on ice over a wide range of temperatures, by incorporating natural and/or diene synthetic rubber with a combination of low-temperature type plasticizer having specific freezing point and alumina of specific particle diameter range. CONSTITUTION:The objective composition can be obtained by incorporating and kneading (A) 100pts.wt. of natural and/or diene synthetic rubber such as polyisoprene, polybutadiene with (B) 10-80pts.wt. of low-temperature type plasticizer such as di-(2-ethylhexyl)phthalate with a freezing point <=-40 deg.C and (C) 45(pref. 10-30)pts.wt. of alumina with an average size 0.01-0.5(pref. 0.05-0.3)mm.. Said composition gives excellent brake performance on ice over a range of temperatures -5--35 deg.C without impairing its wear resistance, wet-road brake performance and road-protecting ability, thus being suitable as a tread rubber composition for spikeless snow tires.
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