Cold Polymerized Emulsion Styrene Butadiene Rubber (SBR) We are supplier Styrene Butadiene Rubber 1500( SBR 1500) Description SBR 1500 is a cold polymerized, 23.5% styrene staining type SBR made with a mixed acid emulsifier, staining stabilizer and salt acid coagulation. SBR 1500 exhibits appreciably higher physical properties than can be obtained with most hot rubbers.