SolpreneВ® 4301 Thermoplastic rubber SBS dry SolpreneВ® 4301 is a linear block copolymer of styrene and butadiene, having 33% of styrene content, most of it forming a polystyrene block, which gives the polymer a thermoplastic behavior. It has a non staining antioxidant system FDA approved for use in food contact applications and is essentially gel free with a very clear color. Presentation S-4301   Porous crumb Main Applications Asphalt Modification (Paving & Roofing), Plastic Modificacion and Adhesives. Documents TDS   MSDS   Characteristics Property Unit Value Structure --- Linear Styrene % 33  Bookfield Viscosity cps --- TSV cSt 12.8 Melt Flow Index, 200oC, 5kg g/10' < 1.0