Solprene 4318 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 Solprene 4318 is a linear block copolymer of styrene and butadiene having 32% of styrene content, most of it forming a polystyrene block which gives the polymer a thermoplastic behavior. It has a non staining antioxidant system FDA approved for use in food contact applications and is essentially gel free with a very clear color. S-4318 is used as compounding ingredient for adhesives. The product is an excellent modifier for asphalt applications including self-adhesive roofing membrane and sealant . Also is used in thermoplastic injected shoe soles formulations. 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 Low viscosity, and good resistance. Excellent tack and peel, good shear and low cohesive strength PSA, sealants Linear thermoplastic block copolymer of styrene and butadiene. Used as compounding ingredient for adhesives and as a modifier for asphalt applications including self-adhesive roofing membrane and sealant. 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 low viscosity, good resistance, very good tack and peel, good shear and low cohesive strength. 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(PSA, sealants).