Advanced Elastomer Systems Santoprene® 181-73 Thermoplastic Rubber

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Subcategory: Elastomer, TPE; Polymer; Thermoplastic

Close Analogs: This grade is no longer a commercial product

Material Notes:
A black thermoplastic medical grade elastomer with good fluid resistance, certified non-toxic by MEM elution test. It has USP Class VI Certificate of Compliance for biocompatibility and can be processed using injection molding, extrusion, blow molding or other melt processing techniques. Drug Master File has been established at US FDA National Center for drugs and biologics.

Key Features: MEM elution cytotoxicity to L-929 mouse fibroblast cells, 72 hr. exposure to rubber extract; NAmSA, MT023-100 test method; test unit, % cell lysis; typical value 0; USP physiochemical test for elastomer closures, heavy metals such as lead; NAmSA, CP020-004 test method; Test unit, ppm; typical value <1

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.

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Physical Properties	Original Value		Comments
Density	0.98 g/cc		TPE-0105 (ASTM D792)
Mechanical Properties
Hardness, Shore A	73		5 Second; TPE-0169 (ASTM D 2240)
Tensile Strength, Ultimate	8.5 MPa		TPE-0153 (ASTM D 412)
Elongation at Break	460 %		TPE-0153 (ASTM D 412)
100% Modulus	0.0036 GPa		TPE-0153 (ASTM D 412)
Tear Strength	28 kN/m		28 kN/m at 23°C. Value at 100°C is 13 kN/m. TPE-0056 (ASTM D 624)
Compression Set	24 %		23°C, 168 hrs.; TPE-0016 (ASTM D 412)
Compression Set, Elevated Temperature	38 %		100°C, 168 hrs.; TPE-0016 (ASTM D 412)
Tensile Set	14 %		23°C, 168 hrs.; TPE-0053 (ASTM D 412)
Thermal Properties
Brittleness Temperature	Max -60 °C		TPE-0089 (ASTM D 746)
Processing Properties
Processing Temperature	177 - 232 °C
Drying Temperature	82 °C		Desiccant drying for 3 hours recommended
Dry Time	3 hour
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