SBR 1502 Styrene Butadiene Rubber, Synthetic SBR rubber, with brand "Yangzi"; large petrochemical co. ... %4.50-6.75GB/T 8657-2000 ASoap %≤0.50Bound styrene %22.5-24.5GB/T 8658-1998Mooney viscosity 50ML(1 ... ,35min), MPa ≥25.5≥24.5Elongation (145,35min),% ≥340≥330 Styrene Butadiene Rubber SBR 1502