CalpreneВ® 540 Thermoplastic rubber SBS dry CalpreneВ® 540 is a 60/40 Butadiene/Styrene Thermoplastic Copolymer, polymerized in solution and having a linear structure. This product is presented in pellet form and has excellent optical properties, due to its clarity. It is stabilized with a non staining antioxidant system FDA approved for use in food contact applications and is essentially gel free with a very clear color. Presentation C-540   Pellet Main Applications Compounding, Adhesives and Plastic Modification. Documents TDS   MSDS   Characteristics Property Unit Value Structure --- Linear Styrene % 40  Bookfield Viscosity cps 600 TSV cSt --- Melt Flow Index, 190oC, 5kg g/10' 5 Volatile matter % 0.4 Hardness  oShore A  90