Advanced F-LSR Elastomers for Automotive Applications

Dow Corning offers fully fluorinated F-LSR elastomers capable of improving design flexibility and increasing process efficiency. These pigmentable elastomers are specially designed for liquid injection molding, which can lower processing costs for membranes, diaphragms, O-rings, seals, and components used in emission controls and engine systems.

Key Features and Applications of Silastic F-LSR Elastomers

Silastic® FL 30-9201 F-LSR and Silastic® FL 40-9201 F-LSR.

  • Exhibit superior tensile and tear strengths for outstanding performance
  • Are stable over a wide temperature range
  • Have good resistance to chemicals, solvents, oils and fuels
  • Suitable for intricate parts

Silastic® FL 30-9201 F-LSR are used in seals and connectors, while Silastic® FL 40-9201 F-LSR are used in connectors, seals and umbrella valves. Silastic® FL 60-9201 F-LSR and Silastic FL 70-9201 F-LSR have nontacky surface with superior fuel and oil resistance. They are also suitable for fabrication of intricate components. Silastic® FL 60-9201 F-LSR often requires no post-curing and is used in membranes and diaphragms. Silastic FL 70-9201 F-LSR exhibits low compression set when post-cured and is used in the fabrication of O-rings.

Dow Corning’s Advanced F-LSR Elastomers

Dow Corning offers the following F-LSR elastomers for fabricating automotive components that demand resistance to solvents, oils, fuels and chemicals and need to endure extreme heat, cold and adverse operating conditions:

  • Silastic® FL 30-9201 F-LSR (30 Shore A durometer)
  • Silastic® FL 40-9201 F-LSR (40 Shore A durometer)
  • Silastic® FL 60-9201 F-LSR (60 Shore A durometer)
  • Silastic® FL 70-9201 F-LSR (70 Shore A durometer)

Silastic® F-LSR Elastomers expand design possibilities by meeting the requirements for overmolding, intricate designs, high precision and small components. They are fast-curing elastomers, thus improving process efficiency with automated processing, increased output, reduced scrap rates through flash-free components and avoidance of secondary deflashing, energy savings and reduced labor costs.

Figure 1 depicts the potential cost savings achieved with F-LSR technology and Figure 2 compares the torque results of FSR and F-LSR elastomers.

Potential cost savings with F-LSR Technology.

Figure 1. Potential cost savings with F-LSR Technology.

Comparison of torque results of FSR and F-LSR elastomers.

Figure 2. Comparison of torque results of FSR and F-LSR elastomers.

Typical Properties of Silastic F-LSR Elastomerss

The following table compares the typical properties of the aforementioned Silastic® F-LSR Elastomers:

Standard* Property Unit Silastic® FL 30-9201 F-LSR Silastic® FL 40-9201 F-LSR Silastic® FL 60-9201 F-LSR Silastic® FL 70-9201 F-LSR
CTM 1094 Viscosity at 10s-1 Pa.s 430 780 850 1,000
ASTM D792 Specific gravity 1.44 1.44 1.42 1.42
As Molded1 Post- Cured2 As Molded1 Post- Cured2 As Molded1 Post- Cured2 As Molded1 Post- Cured2
ASTM D2240 Durometer hardness Shore A 30 33 40 44 60 62 68 70
DIN 53504, S2 Tensile strength MPa 9.4 8.8 9.4 8.5 6.5 7.0 5.8 6.1
DIN 53504, S2 Elongation at break % 550 510 480 410 220 225 180 180
DIN 53504, S2 Modulus 100% MPa 0.56 0.67 1.14 1.23 2.58 2.80 3.32 3.54
ASTM D6248B Tear strength kN/m 16 16 16 14 14 15 15 15
ASTM D395 Compression set after 22h at 175°C (347°F), 25% compression3 % 21 10 17 11 21 11 23 13
ASTM D471 Fluid resistance - 168h volume swell4
Dexron III, 125°C (257°F) % 1 1 1 2
IRM 903, 150°C (302°F) % 3 2 2 2
Reference Fuel C, 60°C (140°F) % 25 23 21 22
Reference FAM B, 60°C (140°F) % 34 32 29 27
E85,60°C (140°F) % 12 11 12 11
RME Biodiesel, 40°C (104°F) % 4 3 3 3
Reference Fuel F, Diesel, 40°C (104°F) % 3 3 2 4
MIL-T-83133E, JP-8, 23°C (73°F) % 7 5 6 6

*CTM: Corporate Test Method; available upon request
ASTM: American Society for Testing and Materials
DIN: Deutsche Industrie Norm
1Press-cured 10min at 120°C (248°F)
2Post-cured 4h at 200°C (392°F)
3Molded buttons, 22h at 175°C (347°F)
4Injection molded slab, post-cured 4h at 200°C (392°F)

This information has been sourced, reviewed and adapted from materials provided by Dow Corning Automotive.

For more information on this source, please visit Dow Corning Automotive.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Dow Corning Automotive. (2019, May 28). Advanced F-LSR Elastomers for Automotive Applications. AZoM. Retrieved on June 19, 2019 from https://www.azom.com/article.aspx?ArticleID=10940.

  • MLA

    Dow Corning Automotive. "Advanced F-LSR Elastomers for Automotive Applications". AZoM. 19 June 2019. <https://www.azom.com/article.aspx?ArticleID=10940>.

  • Chicago

    Dow Corning Automotive. "Advanced F-LSR Elastomers for Automotive Applications". AZoM. https://www.azom.com/article.aspx?ArticleID=10940. (accessed June 19, 2019).

  • Harvard

    Dow Corning Automotive. 2019. Advanced F-LSR Elastomers for Automotive Applications. AZoM, viewed 19 June 2019, https://www.azom.com/article.aspx?ArticleID=10940.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit