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