CalpreneВ® 1015 Styrene-Butadiene Rubber CalpreneВ® 1015 is a linear high molecular weight random-block styrene-butadiene copolymer with 15% styrene, 10% present as a polystyrene block.  It has a non staining antioxidant system, FDA approved for use in food contact applications and is essentially gel free with a very clear colour. Presentation C-1015 Bale Main Applications Paving and Plastic Modification Documents TDS   MSDS   Characteristics Property Unit Value Styrene % 15 Polystyrene %  10  Mooney Viscosity ML1+4, 100ВєC ---  Insoluble Gel % max --- TSV cSt 35     Styrene solution     viscosity 5% cps ---