NBR 3345 (Acrylonitrile-Butadiene Rubber)
Product Overview
NBR 3345 is a high-performance acrylonitrile-butadiene rubber produced through cold polymerized emulsion technology. This specialized nitrile rubber features non-staining, non-discoloring stabilizers, making it ideal for applications requiring excellent oil resistance and aging properties.
The polymer exhibits superior tensile strength, outstanding resistance to aging, and exceptional oil resistance, making it suitable for demanding automotive and industrial applications.
Technical Specifications
| Property | Test Method | Min Value | Max Value | Unit |
|---|---|---|---|---|
| Mooney Viscosity ML(1+4)100℃ | GB/T1232.1 (ASTM D1646) | 38 | 48 | - |
| Volatile Matter | GB/T24131 (ASTM D5668) | - | 0.50 | % |
| Ash Content | GB/T4498.1 (ASTM D5667) | - | 0.75 | % |
| Bound Acrylonitrile Content | SH/T1157.2 | 31.5 | 34.5 | % |
Curing Conditions: 145℃ × 50 minutes
| Property | Test Method | Min Value | Max Value | Unit |
|---|---|---|---|---|
| Tensile Strength | GB/T528 (ASTM D412) | 26.0 | - | MPa |
| Elongation at Break | GB/T528 (ASTM D412) | 450 | - | % |
| 300% Modulus | GB/T528 (ASTM D412) | 8.5 | 14.5 | MPa |
| Material | Parts by Weight |
|---|---|
| NBR 3345 | 100.00 |
| Zinc Oxide | 3.00 |
| Sulfur | 1.50 |
| Stearic Acid | 1.00 |
| HAF Carbon Black (N330) | 40.00 |
| TBBS | 0.70 |
| Total | 146.20 |
Key Features
- Polymerization System: Cold polymerized emulsion technology
- Stabilizer: Non-staining, non-discoloring antioxidant system
- Enhanced Tensile Strength: Superior mechanical properties
- Excellent Aging Resistance: Long-term durability in harsh environments
- Outstanding Oil Resistance: Ideal for petroleum-based fluid contact
Applications
- Automotive seals and gaskets
- O-rings for hydraulic systems
- Fuel and oil hoses
- Industrial rubber components
- Oil-resistant conveyor belts
- Printing rollers
- Chemical processing equipment seals
Processing Notes
Sample Preparation: Raw rubber Mooney testing samples are prepared using the mill method according to GB/T15340. Sample weight: 250±5g, roll temperature: 50±5℃, roll gap: 1.4±0.1mm, total ten passes (first and tenth passes without folding).
Packaging and Storage
Packaging
- Standard packaging: 35 kg polyethylene-lined bags
- Custom packaging available upon request
Storage Conditions
- Store in original sealed containers in a cool, dry, well-ventilated area
- Protect from direct sunlight, moisture, and heat sources
- Maintain storage temperature below 25°C
- Avoid contact with copper, manganese, and other metal catalysts
Safety Information
Refer to Material Safety Data Sheets (MSDS) prior to handling and processing these materials. Follow standard safety protocols for rubber processing and ensure adequate ventilation during processing.
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