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Advanced Elastomer Systems Santoprene® 211-45 Thermoplastic Rubber
Subcategory: Elastomer, TPE; Polymer; Thermoplastic
Material Notes:
A colorable thermoplastic molding grade elastomer with good fluid resistance, formulated to replace thermoset elastomers such as EPDM, polychloroprene, and chlorosulfonated polyethylene. A high-flow material designed for use in difficult injection molding applications.
Key Features: Dielectric constant 2.3, dielectric strength at 3.17 mm (125 mil), 19.6 kV/mm (500 v/mil); Excellent flex fatigue resistance; Excellent ozone resistance; Flex modulus at Tangent 5.5 MPa (800 psi); Excellent sealing properties
Additional processing comments: This thermoplastic rubber is a shear-dependent material that can be processed on conventional thermoplastic equipment for injection molding, extrusion, or blow molding. For extrusion, a general purpose screw with a compression ratio of 2.5 to 3.0 is recommended. 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 | |
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| Density | 0.96 g/cc | 0.0347 lb/in³ | TPE-0105 (ASTM D792) | |
Mechanical Properties | ||||
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| Hardness, Shore A | 45 | 45 | 5 Second; TPE-0169 (ASTM D 2240) | |
| Tensile Strength, Ultimate | 3.8 MPa | 551 psi | TPE-0153 (ASTM D 412) | |
| Elongation at Break | 330 % | 330 % | TPE-0153 (ASTM D 412) | |
| 100% Modulus | 0.0015 GPa | 0.218 ksi | TPE-0153 (ASTM D 412) | |
| Flexural Modulus | 0.0055 GPa | 0.798 ksi | Tangent | |
| Tear Strength | 13.7 kN/m | 78.2 pli | at 23°C. Value at 100°C is 4.9 kN/m. TPE-0056 (ASTM D 624) | |
| Compression Set | 13 % | 13 % | 23°C, 22 hrs.; TPE-0016 (ASTM D 412) | |
| Compression Set, Elevated Temperature | 22 % | 22 % | 100°C, 22 hrs.; TPE-0016 (ASTM D 412) | |
| Tensile Set | 5 % | 5 % | 23°C, 22 hrs.; per TPE-0053 (ASTM D 412) | |
Electrical Properties | ||||
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| Dielectric Constant | 2.3 | 2.3 | Frequency not specified | |
| Dielectric Strength | 19.6 kV/mm | 498 kV/in | at 3.17 mm (0.125 in) | |
Thermal Properties | ||||
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| Brittleness Temperature | Max -60 °C | Max -76 °F | TPE-0089 (ASTM D 746) | |
Processing Properties | ||||
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| 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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