In demanding industrial environments where extreme temperatures, aggressive chemicals, and harsh operating conditions are the norm, material selection is critical. Symb ChemTech’s JHF246 series of fluorocarbon elastomers (FKM), also known as terpolymers, provides a robust solution for sealing, gasketing, and other critical applications. These high-performance elastomers are synthesized through the copolymerization of vinylidene fluoride (VDF), hexafluoropropylene (HFP), and tetrafluoroethylene (TFE), resulting in exceptional resistance properties.
Key Features and Benefits:
The JHF246 series boasts a high fluorine content, which is the key to its outstanding performance characteristics:
- Exceptional High-Temperature Resistance: Capable of long-term use at 275°C and short-term exposure up to 320°C.
- Superior Oil and Chemical Resistance: Excellent resistance to a wide range of oils, including diester oils, and aggressive chemicals, surpassing the performance of F23 type rubbers.
- Excellent Weathering and Ozone Resistance: Withstands harsh environmental conditions, including ozone, UV radiation, and atmospheric aging.
- Good Physical and Mechanical Properties: Maintains strength, elongation, and flexibility even under demanding conditions.
- Resistance to Odorous Hydrogen, Radiation, and Low Air Permeability: Suitable for specialized applications requiring resistance to these factors.
JHF246 Series Grades:
Symb ChemTech offers several grades within the JHF246 series to cater to specific application requirements:
- JHF246L: Offers a balance of properties with a fluorine content of 66%.
- JHF2461 & JHF2462: Higher fluorine content (68.5%) for enhanced chemical and temperature resistance.
- JHF2463: Optimized for compression set performance.
- JHF246G: Highest fluorine content (70%) for maximum resistance in extreme environments.
Technical Specifications (Summary):
| Property | JHF246L | JHF2461/2 | JHF2463 | JHF246G |
|---|---|---|---|---|
| Fluorine Content (%) | 66 | 68.5 | – | 70 |
| Specific Gravity (g/cm³) | 1.77-1.82 | 1.83-1.86 | – | 1.87-1.90 |
| Mooney Viscosity ML(1+10)121°C | ≥20 | 15-65 | 66-130 | >20 |
(Please refer to the full product datasheet for complete technical details.)
Applications:
The versatility of the JHF246 series makes it suitable for a wide range of applications across various industries:
- Aerospace: Seals, gaskets, O-rings, and hoses for aircraft engines and fuel systems.
- Automotive: Fuel system components, gaskets, and seals exposed to high temperatures and aggressive fluids.1
- Oil and Gas: Downhole tools, seals, and gaskets for demanding exploration and production environments.
- Chemical Processing: Seals and gaskets for pumps, valves, and pipelines handling corrosive chemicals.
- Industrial: General-purpose sealing applications requiring high temperature and chemical resistance.
Handling and Safety Precautions:
It is crucial to handle JHF246 series FKMs with appropriate precautions. Decomposition can occur at temperatures above 300°C, releasing toxic hydrogen fluoride (HF) and fluorocarbon compounds. Avoid mixing with metal powders or high concentrations of amine compounds. Always consult the safety data sheet (SDS) for detailed handling and safety information.
Packaging and Storage:
JHF246 series FKMs are typically packaged in polyethylene film bags within hard cartons. Store in a cool, dry place away from moisture, dust, and direct sunlight.
Conclusion:
Symb ChemTech’s JHF246 series of fluorocarbon elastomers provides a reliable solution for demanding applications requiring exceptional resistance to high temperatures, oils, chemicals, and harsh environments. With a range of grades available, Symb ChemTech can provide the optimal material to meet your specific needs. Contact us today to learn more.