Calprene 411 Thermoplastic butadiene and styrene copolymer Dynasol Styrene block copolymer (SBC) >> Styrene butadiene styrene rubber, SBS SEALANT ADHESIVE >> Hot-melt ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) ADHESIVE >> Solvent based Calprene 411 is a 70/30 Butadiene/Styrene Thermoplastic Copolymer, polymerized in solution and has a radial structure. This product is available in porous crumb. Besides the ease with which they may be dissolved, thermoplastic rubbers present a considerable advantage: they do not need to be cured to develop their adhesive properties. This rubber network remains unchanged until the polystyrene is dissolved or softened by heating, giving rise to the two methods (applying a solvent or heat) used to lessen the viscosity of these rubbers which may be utilized as adhesives. Once the temperature of polystyrene goes below its softening point, or when the solvent evaporates, the rubber structure is reestablished. Some of the applications in which our Solprene® and Calprene® thermoplastic rubbers in solvent-based adhesives are used are high-resistant, non-cured adhesives and contact cements, among others. 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. Hot melt adhesives High resistance, color stability Construction, mastics 70/30 butadiene/styrene thermoplastic copolymer, polymerized in solution. Used in adhesives and mastics. Possesses a radial structure. Can be easily dissolved. Does not need to be cured to develop its adhesive properties. Offers adhesion to cloth, paper, films and sheet metal for PSA. Provides high resistance and color stability in hot melt adhesives. Applications: solvent-based adhesives (high-resistant, non-cured adhesives, contact cements), pressure sensitive adhesives (masking tape, cellophane tape, insulating tape, tapes for sealing and binding, decorative contact paper and labels) and hot melt adhesives(construction, mastics).