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ELASTOSIL® R 805/75 OH

1 of 127 products in this brand
ELASTOSIL® R 805/75 OH is a high-consistency silicone rubber (HCR) that produces vulcanizates with excellent resistance to engine oils and aggressive mineral oils, even at high temperatures. It is an oil-resistant, peroxide-curing silicone rubber. The vulcanizates exhibit good mechanical properties and a low compression set.

Polymer Name: Silicone Elastomer

Processing Methods: Compression Molding, Injection Molding, Transfer Molding

Features: Excellent mineral Oil Resistance, Good Mechanical Properties, Heat Stabilized, High Consistency, Low Compression Set, Oil Resistant

Tear Strength: 17.0 - 17.0 kN/m

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Identification & Functionality

Additives Included
Chemical Family
Polymer Name
Technologies

Features & Benefits

Special Features
  • Low compression set
  • Oil resistant

Applications & Uses

Cure Method
Plastics & Elastomers Processing Methods
Application Details
  • ELASTOSIL® R 805/75 OH can be processed by compression, transfer and injection molding. Usually post-curing is not necessary. To achieve an optimum compression set, it is advisable to post-cure the material for 4 hours at 200 °C.
  • ELASTOSIL® R 805/75 OH is especially recommended for the production of shaft seals.

Processing

  • The raw rubber requires the addition of peroxides for vulcanization at elevated temperatures. A homogeneous incorporation  is a must, but please avoid temperatures >30°C along the incorporation process in order to maintain best processing behavior. Pot life is depending on the used peroxide and storage condition.

Properties

Physical Form
Cured Properties
ValueUnitsTest Method / Conditions
Compression Set (Curing Agent C1, at 22 hours, 175°C)14%DIN ISO 815-1 type B method A
Density (Curing Agent C1)1.36g/cm³DIN EN ISO 1183-1 A
Elongation (at break, Curing Agent C1)150%ISO 37 Type 1
Rebound Resilience (Curing Agent C1)50%ISO 4662
Shore Hardness A (Curing Agent C1)80DIN ISO 48-4
Tear Strength (Curing Agent C1)17N/mmASTM D 624 B
Tensile Strength (Curing Agent C1)6.4N/mm²ISO 37 Type 1
Properties
  • ELASTOSIL® R 805/75 OH is an oil resitant peroxide-curing silicone rubber.
  • The addition of heat stabilizers at service temperatures of more than 180 °C is recommended.
Note

Cure conditions: 0.8 % ELASTOSIL® AUX Crosslinker C1 (Dicumylperoxide), 15 min /165 °C in press.

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania
Packaging Information

This product is available in 20 kg and 540 kg cardboard packaging.

Storage & Handling

Storage Information

Please store the cardboard boxes in a dry and cool place. Already opened boxes should be closed again to avoid any contamination.