Nitrile rubber NBR-41

Description

1. Product Overview

Nitrile Rubber NBR-41 is a medium-nitrile content (33% ± 2% ACN) copolymer of butadiene and acrylonitrile, polymerized using cold emulsion technology. It is primarily used for compression-molded and injection-molded components requiring sustained contact with mineral oils, diesel, greases, and aliphatic hydrocarbons. The value proposition: superior tensile retention (≥ 14 MPa after 70h oil aging at 125°C) and low swell characteristics (≤ 25% volume change in IRM 903 oil). Strategically, NBR-41 is critical for Tier 1 automotive and hydraulic sealing manufacturers needing predictable processing and long service life in temperatures from -35°C to +120°C.

2. Key Specifications & Technical Characteristics

• Chemical composition: Butadiene-acrylonitrile copolymer, ACN content 33% ± 2%, Mooney viscosity ML(1+4) at 100°C: 45 ± 5

• Purity level: ≥ 99.5% polymer content; residual stabilizer ≤ 0.5%

• Physical characteristics: Pale yellow to light brown bale; specific gravity 0.98 ± 0.02; ash ≤ 0.8%; volatile matter ≤ 0.75%

• Packaging options: 35 kg shrink-wrapped bales on 1,050 kg pallets; or bulk 1,250 kg octabins

• Shelf life: 24 months in original sealed packaging stored below 30°C, away from UV and ozone

3. Core Industrial Applications

• Automotive & transportation: Fuel hoses, oil pan gaskets, O-rings, and shaft seals – outperforms natural rubber and SBR in fuel immersion (≤ 18% swell vs. > 40% for SBR after 100h at 100°C).

• Oil & gas: Blowout preventer seals, drilling equipment gaskets – provides 3× longer service intervals than neoprene in sour crude environments.

• Industrial hydraulics: Pump diaphragms, accumulator seals – maintains torque retention at 105°C with ≤ 15% hardness increase (Shore A) after 168h.

• Cost advantage: Reduces component replacement frequency by 35–50% in high-abrasion rotary shaft applications compared to standard NBR grades.

4. Competitive Advantages

• Quality consistency: Six Sigma-controlled polymerization with full traceability; each batch includes certified ASTM D412 and D471 test reports.

• Supply reliability: Dual-sourced raw material supply chain; 98.7% on-time delivery rate over 36 months to North America, Europe, and Asia.

• Logistics capability: Temperature-controlled container shipments via 4PL network; 12 lead time from contract to dispatch for bulk orders.

• Price competitiveness: Volume-tiered pricing within 2–3% of global spot indexes (ICIS, ChemAnalyst) with fixed 90-day contracts available.

• Sustainability: Passes REACH SVHC and RoHS 3.0; compound recipes available for reduced PAH content (< 5 ppm). No zinc oxide in base polymer.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 21 metric tons (one full truckload equivalent)

• Bulk 20MT loading capacity: 20.0 MT per 20-ft dry container (56 pallets × 1,050 kg each plus 140 kg bale overpack) or 25.2 MT per 40-ft HC container (stackable octabins)