Wacker Elastosil® R plus 4020/70 Silicone Rubber

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Wacker Elastosil® R plus 4020/70 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R plus 4020/70 is a one-part platinum catalyzed addition-curing silicone rubber for manufacturing molded articles. Cured articles show excellent transparency and very high tear resistance. Application: ELASTOSIL® R plus 4020/70 is suitable for the manufacture of molded articles. Properly post-cured vulcanizates of ELASTOSIL® R plus 4020/70 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	1.20 g/cc	ISO 1183-1 A

Mechanical Properties	Original Value	Comments
Hardness, Shore A	71	DIN 53505
Tensile Strength at Break	8.00 MPa	DIN 53504 S1
Elongation at Break	622 %	DIN 53504 S1
Rebound	46 %	DIN 53512
Tear Strength	55.0 kN/m	ASTM D624 B
Compression Set	47 % @Temperature 175 °C, Time 79200 sec	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	15.0 min @Treatment Temp. 165 °C	post cured 4h/200°C

Descriptive Properties
Appearance	transparent

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PWACK9273 / 204802

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