CalpreneВ® 501 Thermoplastic rubber SBS dry CalpreneВ® 501 is a 69/31 Butadiene/Styrene Thermoplastic Copolymer, polymerized in solution and having a linear structure. Presentation C-501    Porous crumb C-501C  Porous pellet C-501M Powder form dusted with amorphous silica Main Applications Asphalt Modification (Paving and Roofing), Compounding and Adhesives. Documents TDS   MSDS   Characteristics Property Unit Value Structure --- Linear Styrene % 31  Bookfield Viscosity cps 5 000 TSV cSt 13 Melt Flow Index, 190oC, 5kg g/10' --- Volatile matter % 0.4 Hardness  oShore A  76