Wacker Powersil® 3540 MH Silicone Rubber

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Wacker Powersil® 3540 MH Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	Product description: POWERSIL® 3540 MH silicone rubber is a one component, ready to use, addition-curing compound that cures to an electrical insulating, highly erosion resistive silicone elastomer. POWERSIL® 3540 MH shows fast curing in comparison to conventional silicone rubber. Curing time is reduced by (30 … 50) % depending on the wall thickness and on the available machinery and runner system. No peroxide decomposition products are released while curing. Special features: easy demolding excellent dielectric properties high arcing and tracking resistance no unpleasant smell caused by peroxides no inhibition by oxygen Application: POWERSIL® 3540 MH is especially designed for T&D applications. Because of its excellent mechanical properties POWERSIL® 3540 MH is prone for use in “cable accessories” applications. Especially thick walled articles can take advantage of the fast curing material. Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	1.11 g/cc	0.0401 lb/in³	ISO 2781

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	38	38	ISO 868
Tensile Strength at Break	10.0 MPa	1450 psi	ISO 37
Elongation at Break	900 %	900 %	ISO 37
Tear Strength	28.0 kN/m	160 pli	ASTM 624 B

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	IEC 60093
Dielectric Constant	2.8 @Frequency 50 Hz	2.8 @Frequency 50 Hz	IEC 60250
Dielectric Strength	>= 23.0 kV/mm	>= 584 kV/in	IEC 60243
Dissipation Factor	0.00030 @Frequency 50 Hz	0.00030 @Frequency 50 Hz	IEC 60250
Arc Resistance	>= 240 sec	>= 240 sec	IEC 61621

Processing Properties	Metric	English	Comments
Cure Time	15.0 min @Treatment Temp. 165 °C	0.250 hour @Treatment Temp. 329 °F	post-cured 4hr at 150°C

Descriptive Properties
Color	white
Track Resistance	>1A 3.5		IEC 60587

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PWACK9388 / 204917

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