Wacker Elastosil® R 701/40 Silicone Rubber

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Wacker Elastosil® R 701/40 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R 701/40 is a non postcure HCR grade for compression molded products. Special features: heat- and reversion-stabilized Non-post-cure properties: The differences in the mechanical properties of postcured and non-post-cured vulcanizates are only very slight. When Curing Agent E is used, blooming of the decomposition products will not occur. The compounds may be blended to produce any shore hardness value between 40 and 80. Blends with products from other series are also possible. good resistance to mineral oil high elasticity and very low compression set, even when Curing Agent E is used Application: The compounds are recommended for all kinds of seals that come into contact with mineral oils. ELASTOSIL® R 701/40 is used especially when low compression set is crucial for achieving good seal properties. The compounds may also be used for making high quality silicone-rubber-covered rolls. Information provided by Wacker Chemie AG.
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Physical Properties	Original Value	Comments

Density	1.10 g/cc	DIN 53479

Mechanical Properties	Original Value	Comments
Hardness, Shore A	24	Lubrizol OS 206 304, resistance 540hr/150°C
	32	IRM Oil 903, resistance 72hr/150°C
	38	IRM Oil 901, resistance 72hr/150°C
	39	DIN 53505 A
Tensile Strength at Break	3.60 MPa	DIN 53504 S1
	4.00 MPa	IRM Oil 903, resistance 72hr/150°C
	4.20 MPa	Lubrizol OS 206 304, resistance 540hr/150°C
	7.60 MPa	IRM Oil 901, resistance 72hr/150°C
Elongation at Break	267 %	IRM Oil 903, resistance 72hr/150°C
	404 %	Lubrizol OS 206 304, resistance 540hr/150°C
	457 %	DIN 53504 S1
	476 %	IRM Oil 901, resistance 72hr/150°C
Rebound	67 %	DIN 53512
Tear Strength	14.0 kN/m	ASTM D624 B
Compression Set	7.0 % @Temperature 175 °C, Time 79200 sec	DIN ISO 815-B

Processing Properties	Original Value	Comments
Cure Time	15.0 min @Treatment Temp. 165 °C	post cured 4h/200°C

Descriptive Properties
Appearance	opaque

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