ExxonMobil Santoprene® 121-80M300 Thermoplastic Rubber

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ExxonMobil Santoprene® 121-80M300 Thermoplastic Rubber (discontinued **)
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Thermoplastic Elastomer, Melt-Processible Rubber
Material Notes:	Description: A black thermoplastic high-flow elastomer for excellent injection molding performance with good fluid resistance, formulated to replace thermoset elastomers such as EPDM, polychloroprene, and high quality SEBS compounds. It is polyolefin-based and UV stable. Supplied as free-flowing pellets in 20 kilogram (44 pound) moisture barrier bags. Features: Water used as physical foaming agent Density range 0.95 to 0.15 depending on foaming agent Excellent ozone resistance Product Notes: Values are for injection molded plaques, side gated. 82.6 mm x 117.5 mm x 3 mm Information provided by Advanced Elastomer Systems.
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Physical Properties	Metric	English	Comments

Density	0.920 g/cc	0.0332 lb/in³	ASTM D792

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	75	75	5 seconds; ASTM D2240
	80	80	15 seconds; ASTM D2240
	80	80	15 seconds, After oven air aging 1008 hrs. @ 125°C; ASTM D2240
Tensile Strength at Break	8.377 MPa	1215 psi	After oven air aging 1008 hrs. @ 125°C; ASTM D412
	9.31 MPa	1350 psi	Across flow; ASTM D412
Tensile Stress at Strain	3.38 MPa @Strain 100 %	490 psi @Strain 100 %	across flow; ASTM D412
Elongation at Break	504 %	504 %	After oven air aging 1008 hrs. @ 125°C; ASTM D412
	560 %	560 %	Across flow; ASTM D412
Compression Set	44 % @Temperature 70.0 °C, Time 79200 sec	44 % @Temperature 158 °F, Time 22.0 hour	Method B; ASTM D395
	46 % @Temperature 236 °C, Time 252000 sec	46 % @Temperature 457 °F, Time 70.0 hour	Method B; ASTM D395
Tensile Set	11 %	11 %	ASTM D412

Thermal Properties	Metric	English	Comments
Brittleness Temperature	-50.0 °C	-58.0 °F	ASTM D746

Processing Properties	Metric	English	Comments
Processing Temperature	177 - 232 °C	351 - 450 °F
Drying Temperature	82.0 °C	180 °F	Desiccant Dryer
Dry Time	3 hour	3 hour	Desiccant Dryer

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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