MatWeb, The Online Materials Database

Advanced Elastomer Systems Santoprene® 261-87 Thermoplastic Rubber

Subcategory: Elastomer, TPE; Polymer; Thermoplastic

Material Notes:
A colorable thermoplastic elastomer for wet electrical wire and cable applications 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: UL 62 Bulletin listed for flexible cord applications; Wire and cable rating: 105°C (221°F) dry, 75°C (167°F) wet and 60°C (140°F) oil; EM 60 at 75°C (167°F): 1 day SIC = 2.59; % change in SIC, 1 to 14 days = 1.00; % change in SIC, 7 to 14 days = 0.50; Stability factor, 14 days = 0.14; Power factor, %, 14 days = 1.11; Deformation at 150°C (302°F) (T-2/T-1) = 0.59

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	Original Value		Comments
Density	0.96 g/cc		TPE-0105 (ASTM D792)
Mechanical Properties
Hardness, Shore A	87		5 Second; TPE-0169 (ASTM D 2240)
Tensile Strength, Ultimate	14.5 MPa		TPE-0153 (ASTM D 412)
Elongation at Break	600 %		TPE-0153 (ASTM D 412)
100% Modulus	0.0069 GPa		TPE-0153 (ASTM D 412)
Thermal Properties
Maximum Service Temperature, Air	105 °C		Wire and Cable Rating Dry
Brittleness Temperature	Max -59 °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