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High melt flow index for excellent processability in extrusion and injection molding.
Outstanding soft-touch feel and flexibility at room temperature.
Good thermal stability and consistent rheological behavior across processing temperatures.
Enhanced compatibility with polypropylene (PP) and polyethylene (PE) for thermoplastic blends.
Low extractables and compliant with FDA-regulated food-contact applications (when compounded per applicable guidelines).
Soft-grip overmolding for power tools, personal care devices, and consumer electronics.
Flexible packaging sealants and peelable lidding films.
TPE-based medical tubing and non-sterile disposable components.
Automotive interior trim seals and weatherstripping carriers.
Recyclable elastomeric compounds for sustainable consumer goods.
| Chemical Type | Styrene–Ethylene/Butylene–Styrene (SEBS) triblock copolymer |
| Product Form | Pellets |
| Appearance | Off-white to light tan, free-flowing pellets |
| Primary Applications | Soft-touch overmolding, flexible packaging, medical device components |
| Key Features | High melt flow, low hardness, PP/PE compatibility |
| Benefits | Improved cycle times, enhanced tactile performance, recyclability in TPE streams |
| Processing Method | Extrusion, injection molding, blow molding |
| Regulatory Status | Complies with FDA 21 CFR §177.2600 for food-contact use (when formulated appropriately) |
Q1: What is the primary functional role of Kraton FG1901 in polymer formulations?
A: Kraton FG1901 is a selectively hydrogenated styrenic block copolymer (SEBS) elastomer designed primarily as a compatibilizer and impact modifier. It enhances melt processability, improves toughness, and promotes phase adhesion in thermoplastic blends—especially in polyolefin-based systems where polarity mismatch limits performance.
Q2: Is Kraton FG1901 suitable for food-contact or medical-grade applications?
A: Kraton FG1901 is manufactured under stringent quality controls and is commonly selected for applications requiring regulatory compliance, including certain food-contact and medical device components. Final suitability depends on the full formulation, processing conditions, and end-use regulatory pathway; users must conduct their own verification per applicable regional requirements.
Q3: How does Kraton FG1901 differ from standard SEBS grades in terms of thermal stability and processing behavior?
A: As a fully hydrogenated SEBS, Kraton FG1901 offers superior thermal and oxidative stability compared to non-hydrogenated SBS alternatives. It maintains consistent rheological behavior during extended melt processing and exhibits reduced chain scission at elevated temperatures, supporting stable extrusion and injection molding performance.
Q4: What types of polymers does Kraton FG1901 compatibilize most effectively?
A: Kraton FG1901 demonstrates strong compatibility with polypropylene (PP), high-density polyethylene (HDPE), and other non-polar polyolefins. It is also widely used to improve interfacial adhesion in PP/PA6, PP/PC, and HDPE/TPU blends, where its mid-block ethylene–butylene structure provides effective bridging between dissimilar phases.
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