Chlorosulfonated Polyethylene Rubber
Chlorosulfonated Polyethylene Rubber: The Ultimate Weather-Resistant Synthetic Rubber
Chlorosulfonated Polyethylene Rubber (CSM) is a high-performance synthetic rubber known for its exceptional resistance to weathering, ozone, chemicals, and heat. With over 50 years of industrial applications, this versatile material continues to be the preferred choice for demanding environments requiring long-term durability.
Key Properties of Chlorosulfonated Polyethylene Rubber
- Excellent ozone and weather resistance
- Superior chemical resistance to acids, alkalis, and oxidizing agents
- Good mechanical properties including tensile strength and elongation
- Maintains flexibility at low temperatures (-40°C to +150°C)
- Flame retardant properties
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Specific Gravity | 1.10-1.28 g/cm³ | ASTM D792 |
| Tensile Strength | 10-20 MPa | ASTM D412 |
| Elongation at Break | 150-500% | ASTM D412 |
| Hardness (Shore A) | 40-90 | ASTM D2240 |
| Continuous Service Temperature | -40°C to +150°C | - |
Applications of Chlorosulfonated Polyethylene Rubber
Chlorosulfonated Polyethylene Rubber finds extensive use in various industries due to its unique combination of properties:
- Roofing membranes and waterproofing materials
- Industrial hoses and tubing
- Wire and cable insulation
- Chemical-resistant linings and gaskets
- Automotive components
Chlorosulfonated Polyethylene Rubber FAQ
What makes Chlorosulfonated Polyethylene Rubber superior to other synthetic rubbers?
Chlorosulfonated Polyethylene Rubber offers a unique combination of properties that make it stand out. Unlike other synthetic rubbers, CSM provides excellent resistance to ozone, weathering, and a wide range of chemicals while maintaining good mechanical properties. Its molecular structure with chlorine and sulfonyl groups provides these superior characteristics, making it particularly suitable for outdoor applications where other rubbers might degrade quickly.
How does temperature affect Chlorosulfonated Polyethylene Rubber performance?
Chlorosulfonated Polyethylene Rubber performs exceptionally well across a broad temperature range. It maintains flexibility down to -40°C and can withstand continuous service temperatures up to 150°C, with short-term exposure to even higher temperatures possible. The material doesn't become brittle in cold conditions nor does it soften excessively at elevated temperatures, making it ideal for applications with significant temperature variations.
What are the limitations of Chlorosulfonated Polyethylene Rubber?
While Chlorosulfonated Polyethylene Rubber has many advantages, it does have some limitations. It's not recommended for use with strong polar solvents like ketones and esters. Additionally, CSM typically has lower tensile strength compared to some other synthetic rubbers, though this can be improved with proper compounding. The material also requires specific curing systems and may be more expensive than standard synthetic rubbers, though the extended service life often justifies the higher initial cost.
Processing Methods for Chlorosulfonated Polyethylene Rubber
Chlorosulfonated Polyethylene Rubber can be processed using standard rubber manufacturing techniques:
- Compression molding
- Injection molding
- Extrusion
- Calendering
Storage and Handling Recommendations
To maintain the quality of Chlorosulfonated Polyethylene Rubber products:
- Store in a cool, dry place away from direct sunlight
- Keep away from heat sources and open flames
- Maintain relative humidity below 70%
- Use within 12 months of manufacture for optimal performance