Wacker Elastosil® R 420/70 Silicone Rubber

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Wacker Elastosil® R 420/70 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R 420 silicone rubbers feature outstanding tear resistance and high transparency. Application: In principle ELASTOSIL® R 420 silicone rubbers are designed for extrusion, compression, and transfer and injection molding. Postcured parts can be used for food contact applications and are suitable for use under the Recommendation "XV. Silicones" of the BfR and FDA § 177.2600 under observance of any given limitations on extractable and volatile substances. Information provided by Wacker Chemie AG.
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Physical Properties	Original Value	Comments

Density	1.19 g/cc	ISO 1183-1 A

Mechanical Properties	Original Value	Comments
Hardness, Shore A	66	curing agent E; DIN 53505
	72	curing agent C1; DIN 53505
Tensile Strength at Break	9.00 MPa	curing agent E; DIN 53504 S1
	10.0 MPa	curing agent C1; DIN 53504 S1
Elongation at Break	550 %	curing agent C1; DIN 53504 S1
	650 %	curing agent E; DIN 53504 S1
Rebound	40 %	curing agent E; DIN 53512
	46 %	curing agent C1; DIN 53512
Tear Strength	45.0 kN/m	curing agent C1; ASTM D624 B
	48.0 kN/m	curing agent E; ASTM D624 B
Compression Set	42 % @Temperature 175 °C, Time 79200 sec	curing agent C1; DIN ISO 815-B
	63 % @Temperature 175 °C, Time 79200 sec	curing agent E; DIN ISO 815-B

Optical Properties	Original Value	Comments
Transmission, Visible	90 %	"Transparent" but manufacturer does not quantify.

Processing Properties	Original Value	Comments
Cure Time	10.0 min @Treatment Temp. 135 °C	curing agent E, press cured, 4hr/200°C
	15.0 min @Treatment Temp. 165 °C	curing agent C1, press cured, 4hr/200°C
	15.0 min @Treatment Temp. 165 °C	curing agent C6, press cured, 4hr/200°C

Descriptive Properties
Appearance	transparent

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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PWACK9210 / 204739

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