.

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.

CategoryDetails
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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