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COMSOL CD

Advanced Elastomer Systems Santoprene® 121-79 W233 Thermoplastic Rubber

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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 PropertiesOriginal ValueComments
Density0.93 g/cc TPE-0105 (ASTM D792)

Mechanical Properties
Hardness, Shore A79 5 Second; TPE-0169 (ASTM D 2240)
Tensile Strength, Ultimate7.4 MPa TPE-0153 (ASTM D 412)
Elongation at Break510 % TPE-0153 (ASTM D 412)
100% Modulus0.0036 GPa TPE-0153 (ASTM D 412)
Graves Tear Strength30 kN/m TPE-0056 (ASTM D 624)
Compression Set23 % 23°C, 22 hrs.; TPE-0016 (ASTM D 412)
Compression Set, Elevated Temperature52 % 70°C, 22 hrs.; TPE-0016 (ASTM D 412)
Compression Set, Elevated Temperature59 % 100°C, 22 hrs.; TPE-0016 (ASTM D 412)

Thermal Properties
Brittleness TemperatureMax -60 °C TPE-0089 (ASTM D 746)

Processing Properties
Processing Temperature177 - 232 °C 
Drying Temperature82 °C Desiccant drying for 3 hours recommended
Dry Time3 hour 
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