Wacker Elastosil® R 401/70 Silicone Rubber

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Wacker Elastosil® R 401/70 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	Vulcanizates made from this compound exhibit a unique combination of characteristics. They are noted for their good flexibility, high transparency, and mechanical properties. The compounds are easily pigmented with ELASTOSIL® PT Pigment Pastes and have good processing characteristics. Application: 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	1.18 g/cc	ISO 1183-1 A

Mechanical Properties	Original Value	Comments
Hardness, Shore A	70	curing agent E; DIN 53505
	71	curing agent C1; DIN 53505
Tensile Strength at Break	11.0 MPa	curing agent C1; DIN 53504 S1
	11.0 MPa	curing agent E; DIN 53504 S1
Elongation at Break	440 %	curing agent E; DIN 53504 S1
	530 %	curing agent C1; DIN 53504 S1
Rebound	51 %	curing agent C1; DIN 53512
	53 %	curing agent E; DIN 53512
Tear Strength	26.0 kN/m	curing agent E; ASTM D624 B
	31.0 kN/m	curing agent C1; ASTM D624 B
Compression Set	22 % @Temperature 175 °C, Time 79200 sec	curing agent C1; DIN ISO 815-B
	40 % @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

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PWACK9196 / 204725

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