Hydrogenated nitrile rubber compound
Hydrogenated nitrile rubber has good oil resistance (good resistance to fuel oil, lubricating oil, and aromatic solvents), good ozone resistance, heat resistance, excellent chemical corrosion resistance (good resistance to Freon, acid, and alkali), and high resistance to compression permanent deformation. At the same time, hydrogenated nitrile rubber also has high strength, high tearing performance, and excellent wear resistance. It is one of the rubbers with excellent comprehensive performance.
| Category | Details |
|---|---|
| Composition | –Base Polymer: Hydrogenated Nitrile Butadiene Rubber (HNBR) |
| –Reinforcing Fillers: Carbon black (40–60 phr), silica (10–30 phr) | |
| –Plasticizers: Phthalate/adipate esters (5–15 phr) | |
| –Curing Agents: Sulfur/accelerators (0.5–3 phr) or peroxide (DCP) | |
| Physical Properties | –Hardness (Shore A): 60–95 (ASTM D2240) |
| –Tensile Strength: 15–35 MPa (ASTM D412) | |
| –Elongation at Break: 200–500% (ASTM D412) | |
| –Density: 1.1–1.3 g/cm³ | |
| –Abrasion Resistance: <150 mm³ (ASTM D5963. Taber Wear) | |
| Thermal Resistance | –Service Temperature: -40°C to +150°C (intermittent 175°C) |
| –Thermal Stability: <10% weight loss at 175°C (24h, ASTM D573) | |
| Chemical Resistance | –Resistant To: Mineral oils, hydraulic fluids, H2S, and ozone |
| –Limitations: Strong acids, polar solvents (e.g., acetone), and ketones | |
| Key Applications | –Automotive: Seals, gaskets, and timing belts (engine/transmission) |
| –Oil & Gas: Wellhead seals, drilling tools, and O-rings | |
| –Aerospace: Fuel-resistant hoses and vibration dampers | |
| –Industrial: Roller coatings and chemical-processing equipment | |
| Processing | –Mixing: Internal mixer (20–40 min, 50–70°C) or two-roll mill |
| –Molding: Compression/injection molding (160–200°C, 10–25 MPa) | |
| –Curing: Post-cure (180°C, 2–8h) for optimal compression set | |
| Safety & Compliance | –MSDS: Non-flammable (flash point >250°C); avoid inhalation/skin contact |
| –Regulatory: REACH, RoHS, and API 6A (oilfield equipment) | |
| Storage | –Conditions: Cool (<25°C), dry, away from UV/ozone; shelf life 12–24 months |
| –Packaging: Polyethylene-lined bags (prevent moisture absorption) | |
| Quality Control | –Testing: Mooney viscosity (ML 1+4. ASTM D1646), compression set (ASTM D395) |
| –Certifications: ISO 9001 (manufacturing), API Q1 (oil & gas) |
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