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ELASTOSIL® LR 5040/70 A/B

ELASTOSIL® LR 5040/70 A/B is a paste-like, easily pigmentable, two-component liquid silicone rubber with very low volatile content and excellent mechanical properties with no required post-cure. Articles made from ELASTOSIL® LR 5040/70 A/B exhibit high transparency, excellent electrical properties, and mechanical properties engineered for high tear resistance according to DIN ISO 34-1 A (trousers) and ASTM D 624 B (crescent) without post-curing. The ability to meet regulatory requirements for specific food and baby care applications without the need for post-curing offers key advantages in cost savings and productivity.

Brand: ELASTOSIL® LR (114 products)

Polymer Name: Liquid Silicone Rubber (LSR)

Processing Methods: Injection Molding

End Uses: Baby Teats, Bathroom Accessories, Medical Devices, Medical/Healthcare Applications

Features: Cost Effective, Excellent Productivity, Excellent Transparency Properties, Fast Curing, Food Contact Acceptable, Good Electrical Properties, Good Mechanical Properties, Low VOC, Low Volatility, Pigmentable, Tear Resistance

Tear Strength: 12.0 - 12.0 kN/m

Technical Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Plastics & Elastomers End Uses
Plastics & Elastomers Processing Methods
Applications
  • Baby Care
  • Dairy Applications
  • Medical Equipment
  • Molded Parts
  • Sanitary
Application Details
  • ELASTOSIL® LR 5040/70 A/B is designed for the automated, high volume production of injection molded articles. Properly cured vulcanizates of ELASTOSIL® LR 5040/70 A/B can be used for food contact applications and are suitable for use under the Recommendation "XV. Silicones" of the BfR and FDA 21 CFR §177.2600 "Rubber Articles Intended for Repeated Use" considering any given limitations on extractable and volatile substances.
  • Properly cured materials meet the limit of 0.5 % for volatile substances in accordance with BfR “XV. Silicones”, DIN EN 1400:2014-07 and DIN EN 14350-2:2004-11, respectively. Consequently, post-curing may not be necessary, however, as the results may vary with the processing conditions and the geometry of the finished article, it is the responsibility of the person placing the article on the market to verify compliance with all relevant requirements and regulations.
  • Since the measured volatile content increases with decreasing thickness of a part, in particular very thin-walled articles have to be carefully checked for compliance with any relevant limitations for volatile matter.

Processing

The A and B components are delivered ready to use in 20 kg pail and 200 kg drum kits. With adequate metering equipment, they can be pumped directly from the original containers into the injection molding machine and mixed by a static mixer. The mixing ratio is 1 : 1. At room temperature, mixtures of A and B components have a pot life of at least one day.

Properties

Physical Form
Cured Properties
ValueUnitsTest Method / Conditions
Density1.13g/cm³DIN EN ISO 1183-1 A
Elongation (at break)370%ISO 37 Type 1
Shore Hardness A70-DIN ISO 48-4
Tear Strength36N/mmASTM D 624 B
Tear Strength12N/mmDIN ISO 34-1 A
Tensile Strength9.5N/mm²ISO 37 Type 1
Volatile Content (determined for press-cured sheets having 2 mm thickness. For thinner articles the volatile content can be higher.)max. 0.4%BfR Recommendation XV. Silicones
Uncured Properties
ValueUnitsTest Method / Conditions
Dynamic Viscosity (Shear rate 1 s⁻¹)1800000mPa·sDIN EN ISO 3219
Dynamic Viscosity (Shear rate 10 s⁻¹)630000mPa·sDIN EN ISO 3219
Note

Cure conditions: 5 min / 165 °C in press for cured propeties.

Regulatory & Compliance

Technical Details & Test Data

Test Results

The following studies were performed on vulcanizates of ELASTOSIL® LR 5040/70 A/B according to ISO 10993:

  • Hemocombatibility (Hemolysis and Thrombogenicity) (ISO 10993-4)
  • Cytotoxicity (ISO 10993-5)
  • Sensitation LLNA (ISO 10993-10)
  • Pyrogenicity (ISO 10993-11)

The following studies were performed on vulcanizates of ELASTOSIL® LR 5040/70 A/B according to USP class VI:

  • Acute systemic toxicity
  • Intracutaneous toxicity
  • Implantation test

No adverse effects have been detected at any of the studies performed.

Packaging & Availability

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

This product is available in 20 kg pail and 200 kg drum kits.

Storage & Handling

Storage Information

Once opened, containers should always be resealed after use to prevent the platinum catalyst from being poisoned by amines, sulfur or phosphorus compounds.