Nitrile rubber compound
Excellent oil resistance, high wear resistance, good heat resistance, strong adhesion. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance, and slightly low elasticity. Nitrile rubber is mainly used to make oil-resistant rubber products.
| Category | Details |
|---|---|
| Composition | –Base Polymer: Nitrile Butadiene Rubber (NBR, acrylonitrile content 18–50%) |
| –Reinforcing Fillers: Carbon black (30–50 phr), clay (10–20 phr) | |
| –Plasticizers: Phthalate esters (5–15 phr) | |
| –Curing Agents: Sulfur/accelerators (1–4 phr) | |
| Physical Properties | –Hardness (Shore A): 40–90 (ASTM D2240) |
| –Tensile Strength: 10–25 MPa (ASTM D412) | |
| –Elongation at Break: 300–600% (ASTM D412) | |
| –Abrasion Resistance: <200 mm³ (ASTM D5963. Taber Wear) | |
| Thermal Resistance | –Service Temperature: -30°C to +120°C (intermittent 150°C) |
| –Thermal Stability: <15% weight loss at 120°C (24h, ASTM D573) | |
| Chemical Resistance | –Resistant To: Mineral oils, greases, hydraulic fluids, and dilute acids |
| –Limitations: Polar solvents (e.g., acetone), ozone, and weathering | |
| Key Applications | –Automotive: Fuel hoses, O-rings, and seals |
| –Industrial: Gaskets, conveyor belts, and oil-resistant rollers | |
| –Consumer: Gloves, footwear soles, and adhesive tape backing | |
| Processing | –Mixing: Two-roll mill (15–30 min, 40–60°C) or internal mixer |
| –Molding: Compression/injection molding (150–180°C, 5–20 MPa) | |
| –Curing: Post-cure (150°C, 2–4h) for compression set optimization | |
| Safety & Compliance | –MSDS: Non-flammable (flash point >200°C); avoid inhalation/skin contact |
| –Regulatory: REACH, RoHS, and FDA 21 CFR 177.2600 (food-grade variants) | |
| Storage | –Conditions: Cool (<25°C), dry, away from UV/ozone; shelf life 6–12 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), ASTM D2000 (standard classification) |
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