Wacker Elastosil® R 780/80 Silicone Rubber

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Wacker Elastosil® R 780/80 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R 780/80 silicone rubber contains large amounts of inert fillers (mainly ground quartz) and has been developed specifically for blending with low durometer bases. Application: ELASTOSIL® R 780/80 silicone rubber allows large amounts of inert fillers to be readily incorporated into silicone rubber bases. This avoids the risk of silicosis when inert fillers are compounded on a roll mill. The main advantages of blends containing inert fillers are, for example, their improved oil resistance and grindability. It can be used to rapidly adjust the specific gravity of formulations to meet specifications. Blends with low durometer bases result in compounds of medium Shore A hardness with high filler content and good mechanical properties. Information provided by Wacker Chemie AG.
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Physical Properties	Original Value	Comments

Density	1.74 g/cc	DIN 53479

Mechanical Properties	Original Value	Comments
Hardness, Shore A	80	curing agent E; DIN 53505
	85	curing agent C1; DIN 53505
Tensile Strength at Break	6.00 MPa	curing agent E; DIN 53504 S1
	7.00 MPa	curing agent C1; DIN 53504 S1
Elongation at Break	60 %	curing agent C1; DIN 53504 S1
	70 %	curing agent E; DIN 53504 S1
Rebound	58 %	curing agent C1; DIN 53512
	60 %	curing agent E; DIN 53512
Tear Strength	7.00 kN/m	curing agent C1; ASTM D624 B
	8.00 kN/m	curing agent E; ASTM D624 B
Compression Set	11 % @Temperature 175 °C, Time 79200 sec	curing agent C1; DIN ISO 815-B
	15 % @Temperature 175 °C, Time 79200 sec	curing agent E; DIN ISO 815-B

Processing Properties	Original Value	Comments
Cure Time	10.0 min @Treatment Temp. 135 °C	post cured 4h/200°C, E crosslinker
	15.0 min @Treatment Temp. 165 °C	post cured 4h/200°C, C1 crosslinker

Descriptive Properties
Appearance	beige

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Overview of materials for Silicone Rubber

PWACK9243 / 204772

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