Calprene 540 Thermoplastic butadiene and styrene copolymer Dynasol Styrene block copolymer (SBC) >> Styrene butadiene styrene rubber, SBS ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) Calprene 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. C-540 is used in adhesive formulation, in thermoplastic injected shoe sole formulations, and transparent compounds. These adhesives are used in products such as masking tape, cellophane tape, insulating tape, tapes for sealing and binding, decorative contact paper and labels. Some recent applications are used for installing tiles and other heavy objects. Pressure-sensitive adhesives may be used on cloth, paper, films and sheet metal. The latter two are normally covered with a thin layer of fixative to improve the bonding of the adhesive. Formulations which only use natural rubber tend to soften over time, while those using SBRs become hard as a result of oxidization. 60/40 butadiene/styrene thermoplastic copolymer, polymerized in solution. Used in pressure-sensitive adhesives. Possesses a linear structure and very good optical properties. Offers adhesion to cloth, paper, films and sheet metal for PSA. Applications: pressure sensitive adhesives (masking tape, cellophane tape, insulating tape, tapes for sealing and binding, decorative contact paper and labels).