| 摘要 |
PURPOSE:To obtain a crosslinked rubber compsn. which has excellent wear resistance, can be clearly toned, does not cause slipping on a wetted surface and can be easily expanded, by blending an org. peroxide crosslinking agent, a blowing agent and a toning agent with a blend of 1,2-polybutadiene and a rubber component in a specified ratio. CONSTITUTION:0.1-5pts.wt. org. peroxide (pref. dialkyl peroxide), 0-30pts.wt. blowing agent (e.g. sodium bicarbonate or azodicarbonamide) and a toning agent (known inorg. or org. toning agent) are blended with 100pts.wt. mixture of 30-90wt% 1,2-polybutadiene (A) having a bonded vinyl content of 70% or above, a crystallinity of 5% or above and an intrinsic viscosity [eta] of 0.5dl/g or above (in toluene at 30 deg.C) and 10-70wt% at least one member (B) selected from natural and synthetic diene rubbers. Pref. the toning agent is used in a quantity of 0.1-30pts.wt. per 100pts.wt. mixture of components A and B.
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