Calprene 419 Thermoplastic butadiene and styrene copolymer Dynasol Styrene block copolymer (SBC) >> Styrene butadiene styrene rubber, SBS ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) Calprene 419 is a 70/30 Butadiene/Styrene Thermoplastic Copolymer, polymerized in solution and has a radial structure. This product is available in porous crumb. Due to their high cohesive strength, thermoplastic polymers are widely used in pressure-sensitive adhesive formulations. 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. 70/30 butadiene/styrene thermoplastic copolymer, polymerized in solution. Used in pressure-sensitive adhesives. Possesses a radial structure and high cohesive strength. Offers adhesion to cloth, paper, films and sheet metal for PSA. Applications : pressure-sensitive adhesives (as masking tape, cellophane tape, insulating tape, tapes for sealing and binding, decorative contact paper and labels).