| 摘要 |
PURPOSE:To obtain a foamed material having excellent slip resistance on wet surface, slip resistance on normal road surface, abrasion resistance and light- weight and suitable for sole of footware, by crosslinking and foaming a mixture of 1,2-polybutadiene, a solution-polymerized SBR, a natural rubber, etc. CONSTITUTION:(A) 20-95(wt)% (preferably 30-70%) 1,2-polybutadiene having a vinyl bond content of >=70%, a crystallinity of >=5% (preferably 10-40%) and an intrinsic viscosity [eta] of >=0.5dl/g (measured in toluene at 30 deg.C) is mixed with (B) 5-60% (preferably 10-50%) solution-polymerized styrene-butadiene copolymer having a 1,2-bond content of 25-49% in butadiene unit and bonded styrene content of 4-40% and (C) 5-50% (preferably 10-40%) polymers selected from natural rubber, a synthetic diene rubber (excluding the copolymerized rubber of the component B) and a block copolymer of an aromatic vinyl compound and a conjugated diene compound. The mixture is crosslinked and foamed in the presence of a foaming agent. |
