Wacker Elastosil® LR 3005/70 A/B Liquid Silicone Rubber

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Wacker Elastosil® LR 3005/70 A/B Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	Liquid silicone rubber of the ELASTOSIL® LR 3005 series are a paste-like, easily-pigmentable two component compounds with extremely short curing times. The vulcanizates are noted for their excellent mechanical and electrical properties. Due to the excellent compression set, there is no need to postcure technical parts. Properties: Narrow Shore hardness range. The products can be used within a temperature range of - 55°C to + 210°C. The addition of heat stabilizers at service temperatures of more than 180 °C is recommended. Application: These grades are particularly suitable for the economical production of large series of injection molded articles. Parts made from ELASTOSIL® LR 3005 are particularly suitable for the economical production of large series of injection moulded articles. They can generally be used for technical applications without post-curing, but do not comply with regulations in the pharmaceutical and food industry. Information provided by Wacker Chemie AG.
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Physical Properties	Original Value	Comments

Density	1.15 g/cc	DIN EN ISO 1183-1 A
Viscosity	540000 cP @Shear Rate 10.0 1/s	DIN 53019
	1.74e+6 cP @Shear Rate 0.900 1/s	DIN 53019

Mechanical Properties	Original Value	Comments
Hardness, Shore A	70	DIN 53505
Tensile Strength at Break	9.00 MPa	DIN 53504 S 1
Elongation at Break	350 %	DIN 53504 S 1
Rebound	65 %	DIN 53512
Tear Strength	31.0 kN/m	ASTM 624 B
Compression Set	13 % @Temperature 175 °C, Time 79200 sec	post cure 6h/200°C; DIN ISO 815-B

Electrical Properties	Original Value	Comments
Volume Resistivity	6.00e+16 ohm-cm	DIN IEC 93
Dielectric Constant	2.7 @Frequency 50 Hz	DIN VDE 0303
Dielectric Strength	26.0 kV/mm @Thickness 1.00 mm	DIN IEC 243-2
Dissipation Factor	0.000014 @Frequency 50 Hz	DIN VDE 0303

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	210 °C	with heat stabilizer
Minimum Service Temperature, Air	-55.0 °C

Optical Properties	Original Value	Comments
Transmission, Visible	90 %	"Transparent" but manufacturer does not quantify.

Processing Properties	Original Value	Comments
Cure Time	5.00 min @Treatment Temp. 165 °C	in press, postcuring for 4h/200°C (in ventilated air)

Descriptive Properties
Appearance	transparent

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