Wacker Elastosil® R plus 4305/70 batch Silicone Rubber

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USP Class VI Approved Adhesives for Medical Device Applications
Master Bond’s biocompatible adhesives are designed to meet the needs of medical device manufacturers. Compounds withstand various types of sterilization methods.

Wacker Elastosil® R plus 4305/70 batch Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R plus 4305/70 HCR silicone rubbers are addition-curing, two part compounds (batch grades). The vulcanizates show excellent transparency and good to very good mechanical properties. Properly postcured vulcanizates of ELASTOSIL® R plus 4305/70 comply with BfR and FDA food contact regulations. The material also passes USP XXIII Class VI and ISO 10993 certification is available. Application: ELASTOSIL® R plus 4305/70 is intended for fabrication of extruded articles that afford high transparency and very good tear resistance values. Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	1.17 g/cc	0.0423 lb/in³	ISO 1183-1 A

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	70	70	ASTM D2240
Tensile Strength at Break	9.50 MPa	1380 psi	ASTM D412
Elongation at Break	650 %	650 %	ASTM D412
Tear Strength	46.0 kN/m	262 pli	ASTM D624
Compression Set	20 % @Temperature 175 °C, Time 79200 sec	20 % @Temperature 347 °F, Time 22.0 hour	WSTM 1114

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

Processing Properties	Metric	English	Comments
Cure Time	15.0 min @Treatment Temp. 165 °C	0.250 hour @Treatment Temp. 329 °F	post cured 4h/200°C

Compliance Properties	Metric	English	Comments
USP Class VI	Yes	Yes

Descriptive Properties
Appearance	transparent

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PWACK9290 / 204819

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