Septon SEPS Hydrogenated poly-isoprene Kuraray Rubber - Elastomer >> Polyisoprene rubber, IR SEALANT ADHESIVE Septon™ are hydrogenated styrene block copolymer materials. It is available as a hydrogenated poly-isoprene (SEPS) polymer. No Crystallization Moderate Tensile Strenght High Elongation The versatility of SEPTON™ polymers oiginates from the unique molecular structure. Each molecule of SEPTON™ consists of block segments of styrene monomer units and hydrogenated conjugated diene monomer units. SEPTON™ is available in either a diblock(A-B)type: 1 or the more common triblock (A-B)type: 2 or 3. The A-B-A structure of the SEPTON™ rubber molecule has polystyrene end blocks and an elastomeric midblock. Prior to processing, the polystyrene end blocks are associeated in rigid domains. In the presence of heat and shear such as during processing, the polystyrene domains soften and permits flow. After cooling, the polystyrene domains reform and harden, locking the rubber network in place. This physical phenomenon provides SEPTON™ with its high tensile strength. The rubber midblock provides SEPTON™ its elasticity. Since SEPTON™ is a thermoplastic, it is recyclable. 1 Polystyrene-b-poly(ethylene/propylene) 2 Polystyrene-b-poly(ethylene/propylene)-b-Polystyrene 3 Polystyrene-b-poly(ethylene/butylene)-b-Polystyrene Adhesives, sealants Hydrogenated poly-isoprene (SEPS) polymer. Consists of block segments of styrene monomer units and hydrogenated conjugated diene monomer units. Used in adhesives and sealants. Possesses elasticity and thermoplastic properties. Provides no crystallization, moderate tensile strenght and high elongation.