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Advanced Elastomer Systems Santoprene® 121-79 W233 Thermoplastic Rubber

Subcategory: Elastomer, TPE; Polymer; Thermoplastic

Material Notes:
A black thermoplastic elastomer with excellent adhesion to vulcanized thermoset EPDM rubber, specifically formulated for injection 'corner molding' applications.

Key Features: Excellent adhesion to vulcanized EPDM rubber; Specially formulated as corner molding material in automotive glass run channel to replace thermoset EPDM rubber corner molding materials; Good melt flow properties; Good compression properties; Short processing time compared to thermoset EPDM rubber

Additional processing comments: This thermoplastic rubber is a shear-dependent material that can be processed on conventional thermoplastic equipment for injection molding. Material can be recycled. SANTOPRENE rubber is incompatible with acetal and PVC.

Values below are for injection molded plaques, side gated, 82.6 mm x 117.5 mm x 3.0 mm. Tensile properties measured across flow. Data provided by Advanced Elastomer Systems.

Physical Properties Metric English Comments

Density 0.93 g/cc 0.0336 lb/in³ TPE-0105 (ASTM D792)

Mechanical Properties

Hardness, Shore A 79 79 5 Second; TPE-0169 (ASTM D 2240)

Tensile Strength, Ultimate 7.4 MPa 1070 psi TPE-0153 (ASTM D 412)

Elongation at Break 510 % 510 % TPE-0153 (ASTM D 412)

100% Modulus 0.0036 GPa 0.522 ksi TPE-0153 (ASTM D 412)

Graves Tear Strength 30 kN/m 171 pli TPE-0056 (ASTM D 624)

Compression Set 23 % 23 % 23°C, 22 hrs.; TPE-0016 (ASTM D 412)

Compression Set, Elevated Temperature 52 % 52 % 70°C, 22 hrs.; TPE-0016 (ASTM D 412)

Compression Set, Elevated Temperature 59 % 59 % 100°C, 22 hrs.; TPE-0016 (ASTM D 412)

Thermal Properties

Brittleness Temperature Max -60 °C Max -76 °F TPE-0089 (ASTM D 746)

Processing Properties

Processing Temperature 177 - 232 °C 351 - 450 °F

Drying Temperature 82 °C 180 °F Desiccant drying for 3 hours recommended

Dry Time 3 hour 3 hour

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