Styrene Butadiene Rubber
High-Quality Styrene Butadiene Rubber for Industrial Applications
Styrene Butadiene Rubber (SBR) is one of the most widely used synthetic rubbers in various industries. With excellent abrasion resistance, good aging stability, and high elasticity, it serves as an ideal material for automotive tires, shoe soles, conveyor belts, and many other applications.
Key Specifications of Our Styrene Butadiene Rubber
- Grade: 1502, 1712, 1778 series available
- Appearance: Light-colored sheets or bales
- Specific Gravity: 0.94 - 0.96 g/cm³
- Tensile Strength: 18 - 30 MPa
- Elongation at Break: 400 - 600%
- Hardness (Shore A): 40 - 90
- Mooney Viscosity (ML 1+4 at 100°C): 40 - 60
- Styrene Content: 23.5% ± 1%
| Property | Test Method | Typical Value |
|---|---|---|
| Volatile Matter | ASTM D5668 | ≤ 1.0% |
| Ash Content | ASTM D5667 | ≤ 1.0% |
| Soap Content | ASTM D1416 | ≤ 0.5% |
| Stabilizer Content | ISO 247 | 0.6 - 1.4% |
| Glass Transition Temperature | DSC | -50°C to -60°C |
Frequently Asked Questions About Styrene Butadiene Rubber
What are the main advantages of Styrene Butadiene Rubber compared to natural rubber?
Styrene Butadiene Rubber offers superior abrasion resistance, better aging characteristics when exposed to ozone or UV light, and more consistent quality than natural rubber. It also provides better processing characteristics for many applications and typically costs less than premium natural rubber grades.
How should Styrene Butadiene Rubber be stored for optimal shelf life?
Styrene Butadiene Rubber should be stored in a cool, dry place away from direct sunlight, heat sources, and ozone-generating equipment. Ideal storage temperature is between 10°C and 30°C (50°F - 86°F) with relative humidity below 70%. Keep in original packaging until use and avoid stacking too high to prevent deformation.
What processing methods are suitable for Styrene Butadiene Rubber?
Styrene Butadiene Rubber can be processed using all standard rubber processing methods including mixing (Banbury or open mill), calendering, extrusion, and compression/transfer/injection molding. Typical vulcanization temperatures range from 140°C to 180°C (284°F - 356°F) depending on the specific compound and application requirements.
Processing and Applications
Styrene Butadiene Rubber is compatible with most standard rubber compounding ingredients. For optimal performance, typical formulations include:
- Carbon black or silica as reinforcing fillers
- Processing oils and plasticizers
- Sulfur or peroxide curing systems
- Antioxidants and antiozonants
- Accelerators and activators
Primary Applications:
| Industry | Application | Recommended Grade |
|---|---|---|
| Automotive | Tires, hoses, vibration dampers | SBR 1502, SBR 1712 |
| Footwear | Shoe soles, rubber boots | SBR 1502 |
| Industrial | Conveyor belts, gaskets, seals | SBR 1502, SBR 1778 |
| Construction | Waterproofing membranes, adhesives | SBR Latex |
Safety and Handling
When handling Styrene Butadiene Rubber, observe these safety precautions:
- Use proper ventilation in processing areas
- Wear protective gloves when handling raw material
- Avoid breathing dust from dry powders
- Store away from strong oxidizers
- Follow all local regulations for rubber disposal
Additional FAQ About Styrene Butadiene Rubber
What is the difference between emulsion SBR and solution SBR?
Emulsion SBR (E-SBR) is produced through emulsion polymerization and typically has broader molecular weight distribution, making it easier to process. Solution SBR (S-SBR) is made through solution polymerization, offering better control over molecular structure, resulting in superior rolling resistance and wet traction for high-performance tire applications.
Can Styrene Butadiene Rubber be blended with other elastomers?
Yes, Styrene Butadiene Rubber is frequently blended with natural rubber, polybutadiene rubber, or other synthetic rubbers to achieve specific performance characteristics. Blending can improve tensile strength, abrasion resistance, or low-temperature flexibility depending on the secondary elastomer used.
How does temperature affect Styrene Butadiene Rubber performance?
Styrene Butadiene Rubber performs well in temperatures from -40°C to 100°C (-40°F to 212°F) for most applications. At low temperatures, it stiffens more than natural rubber but maintains better flexibility than many other synthetics. At high temperatures, proper compounding with antioxidants is essential to maintain properties.