Kraton MD-1648 is a clear, linear triblock copolymer based on styrene and ethylene/butylene (SEBS). It features high strength, low viscosity, and excellent UV and thermal stability. This grade is specifically designed for use in pressure-sensitive adhesives, sealants, and polymer modification. Technical Data Sheets (TDS) are available upon request.
| Manufacturer | Kraton |
|---|---|
| Density | 0.91 g/cm³ |
| MFR | 5.0 g/10min |
| Elongation at Break | 500 % |
| Izod Notched Impact | No Break |
Note: See the product description for additional technical specifications
In the field of high-performance elastomer materials, Kraton SEBS MD-1648 is a premium-grade material widely used in automotive, electronics, and consumer goods industries. As a high-quality SEBS (Styrene-Ethylene-Butylene-Styrene) thermoplastic elastomer, it combines the flexibility of rubber with the processability of plastics, making it an essential material in modern manufacturing.
One-sentence definition:
Kraton SEBS MD-1648 is a high-performance hydrogenated styrenic block copolymer elastomer designed for modification, compounding, and injection molding applications.
Key Selling Points:
Excellent flexibility and resilience: Provides superior rubber-like feel and long-term durability
Outstanding weather resistance and aging performance: Suitable for outdoor and harsh environments
Good processability and compatibility: Ideal for blending with PP, PE, and other materials
| Property | Value | Test Method | Test Condition |
| Density | 0.91 g/cm³ | ASTM D792 | 23°C |
| Melt Flow Rate (MFR) | 5 g/10min | ASTM D1238 | 230°C / 2.16 kg |
| Tensile Strength | 12 MPa | ASTM D412 | Standard environment |
| Elongation at Break | 500% | ASTM D412 | Standard environment |
| Notched Izod Impact | No Break | ASTM D256 | 23°C |
| Heat Deflection Temperature (HDT) | 75°C | ASTM D648 | 0.45 MPa |
Note:The above data are typical values and may vary depending on processing conditions and formulations.
Kraton SEBS MD-1648 is widely used across multiple high-end industries due to its excellent elasticity and processing performance:
Automotive sealing strips and door/window sealing systems
Soft-touch dashboard materials
Wire harness sheathing and vibration damping components
Advantage: Excellent weather resistance and UV stability
Cable sheathing and wire insulation
Plug overmolding applications
Advantage: Good electrical insulation and flexibility
Tool handles (e.g., screwdrivers, anti-slip grips)
Sports equipment and daily-use soft components
Advantage: Comfortable touch and anti-slip performance
Medical tubing (PVC alternative)
Food-contact elastic materials
Advantage: Environmentally friendly and non-toxic
| Comparison Dimension | SEBS (MD-1648) | SBS |
| Aging Resistance | Excellent (hydrogenated structure) | Poor |
| Weather Resistance | Excellent | Easy to oxidize |
| Cost | Higher | Lower |
| Service Life | Long | Short |
Conclusion: SEBS is more suitable for high-end applications requiring durability.
| Comparison Dimension | SEBS | PVC |
| Environmental Performance | Halogen-free, eco-friendly | Contains chlorine |
| Flexibility | Excellent | Requires plasticizers |
| Processability | Easy to process | Moderate stability |
| Safety | High | Potential migration risk |
Conclusion: SEBS is an ideal environmentally friendly alternative to PVC.
To achieve optimal performance of Kraton SEBS MD-1648, the following processing parameters are recommended:
Drying Temperature: 60–80°C (2–3 hours, depending on humidity)
Processing Temperature: 180–230°C
Mold Temperature: 20–50°C
Injection Pressure: 60–100 MPa
Processing Temperature: 170–220°C
Screw Speed: 30–80 rpm
Use a dehumidifying dryer to ensure stable moisture content
Can be blended with PP to improve rigidity and heat resistance
Avoid prolonged high-temperature residence time to prevent degradation
1. Can Kraton SEBS MD-1648 replace PVC?
Yes. In many flexible applications such as cable sheathing and medical tubing, SEBS can serve as an environmentally friendly alternative without plasticizer migration issues.
2. Is SEBS MD-1648 suitable for outdoor use?
Yes. Its hydrogenated structure provides excellent UV and oxidation resistance, making it ideal for long-term outdoor applications.
3. Can it be blended with PP or PE?
Yes. SEBS has excellent compatibility with polyolefins such as PP and PE, and is widely used for material modification.
4. Is drying required before processing?
Light drying is recommended, especially in high-humidity environments, to ensure stable processing and product quality.
