Advanced Elastomer Systems Santoprene® 221-55 Thermoplastic Rubber

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Subcategory: Elastomer, TPE; Polymer; Thermoplastic

Material Notes:
A colorable thermoplastic UV grade elastomer with good fluid resistance, formulated to replace thermoset elastomers such as EPDM, polychloroprene, and chlorosulfonated polyethylene. It can be processed using injection molding, extrusion, blow molding or other melt processing techniques.

Key Features: Dielectric constant 2.3, dielectric strength at 3.17 mm (125 mil), 19.6 kV/mm (500 v/mil); Continuous temperature rating 1000 hrs. @ 135°C (275°F); Excellent flex fatigue resistance; Excellent ozone resistance; Excellent mechanical properties retention after UV exposure

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	0.97 g/cc		TPE-0105 (ASTM D792)
Mechanical Properties
Hardness, Shore A	55		5 Second; TPE-0169 (ASTM D 2240)
Tensile Strength, Ultimate	5.2 MPa		TPE-0153 (ASTM D 412)
Elongation at Break	400 %		TPE-0153 (ASTM D 412)
100% Modulus	0.002 GPa		TPE-0153 (ASTM D 412)
Compression Set	23 %		23°C, 168 hrs.; TPE-0016 (ASTM D 412)
Electrical Properties
Dielectric Constant	2.3		Frequency not specified
Dielectric Strength	19.6 kV/mm		at 3.17 mm (0.125 in)
Thermal Properties
Maximum Service Temperature, Air	135 °C		Continuous temperature Rating, 1000 hours
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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