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High melt flow index for excellent processability in extrusion and injection molding.
Outstanding thermal stability and low compression set for durable flexible parts.
Excellent clarity and gloss for premium aesthetic applications.
Good compatibility with polypropylene (PP) and polyethylene (PE) for thermoplastic vulcanizate (TPV) blends.
Low extractables and compliant with FDA 21 CFR §177.2600 for food-contact-adjacent applications.
Soft-touch overmolding for consumer electronics housings and grips.
Flexible components in medical devices requiring biocompatibility and sterilization resistance.
Seals and gaskets in automotive interior trim and HVAC systems.
Flexible packaging films requiring toughness, clarity, and seal integrity.
High-performance thermoplastic elastomer (TPE) compounds for appliance handles and knobs.
| Chemical Type | Styrene–ethylene/butylene–styrene (SEBS) triblock copolymer |
| Product Form | Pellets |
| Appearance | Off-white to light tan, free-flowing pellets |
| Melt Flow Rate (230°C, 2.16 kg) | 25 g/10 min |
| Styrene Content | ~28 wt% |
| Density (23°C) | 0.90 g/cm³ |
| Hardness (Shore A) | 45 |
| Primary Applications | Soft-touch overmolding, medical device components, automotive interior elastomers |
Q1: What is the primary functional role of Kraton MD6945 in formulated products?
A: Kraton MD6945 is a styrenic block copolymer elastomer designed to provide thermoplastic elasticity, melt-processability, and soft-touch characteristics. It is commonly used as a modifier to enhance flexibility, impact resistance, and low-temperature performance in polymer blends—especially in polyolefin-based systems.
Q2: Is Kraton MD6945 compatible with common polyolefins such as PP and HDPE?
A: Yes, Kraton MD6945 exhibits good compatibility with polypropylene (PP) and high-density polyethylene (HDPE), particularly when used at appropriate ratios and with optimized processing conditions. Its SEBS structure allows for effective dispersion and interfacial adhesion in these matrices, contributing to improved toughness without significant loss of stiffness.
Q3: How does Kraton MD6945 compare to other SEBS grades in terms of hardness and melt flow behavior?
A: Kraton MD6945 is positioned as a medium-hardness, medium-melt-flow SEBS grade—offering a balanced combination of processability and elastic recovery. Compared to softer, lower-melt-flow SEBS types, it provides greater dimensional stability during extrusion or injection molding; compared to harder, higher-melt-flow variants, it delivers superior elongation and resilience in end-use applications.
Q4: Can Kraton MD6945 be used in applications requiring regulatory compliance for food contact or medical devices?
A: Kraton MD6945 is manufactured under controlled conditions suitable for use in certain regulated applications, but final compliance depends on the full formulation, processing history, and intended end-use. Customers must validate suitability against applicable regional requirements—including FDA, EU, or ISO standards—as Kraton does not pre-certify formulations for specific regulatory pathways.
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E-mail: wangxingqiang@ericwchem.com
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