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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