Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Kuraray SEPTON™ 4044 Impact Modifier

SEPTON™ 4044 is a SEEPS styrenic thermoplastic elastomer of Kuraray’s 4000 series with 32% styrene content. It features high tensile strength, excellent oil retention and PE compatibility, no melt flow under standard conditions, superior heat/weather resistance and chemical stability, ideal for high-performance adhesives, sealants and polymer modification of high-end polyolefin systems.

Features Of Kuraray SEPTON™ 4044 Impact Modifier

  1. 32% styrene content with SEEPS structure, delivering higher tensile strength and excellent compression set performance than conventional SEBS.

  2. Excellent oil retention capacity, maintaining structural and performance stability in high oil-filled formulations for long-term use.

  3. Good compatibility with polyethylene (PE), realizing efficient blending with polyolefin resins and performance enhancement of composite systems.

  4. No melt flow under standard test conditions, high molecular weight with stable physical and chemical properties in harsh service environments.

  5. Superior heat, weather and chemical resistance, no plasticizer added, environmentally friendly and suitable for high-end formulation preparation.

Typical Applications Of Kuraray SEPTON™ 4044 Impact Modifier

  1. High-performance adhesives and sealants: Formulated into structural adhesives and high-end sealants for aerospace, automotive and electronic fields with excellent bonding and sealing performance.

  2. Oil-filled gel products: Used in electronic component potting gel, automotive shock absorption gel with outstanding oil retention and low-temperature flexibility.

  3. Polyolefin polymer modification: Serves as a toughening modifier for PE/PP blends to improve tensile strength and environmental stress cracking resistance.

  4. High-end automotive components: Applied in oil seals, engine compartment gaskets and wire cable insulation for oil resistance and high-temperature stability.

  5. Protective coatings: Compounded into chemical-resistant protective coatings for metal and plastic substrates in industrial harsh environments.

Specifications Of Kuraray SEPTON™ 4044 Impact Modifier

Physical Properties
Styrene Content32 wt%
Hardness- (Type A)
Melt Flow Properties
Melt Flow Rate (230°C, 2.16 kg)No flow g/10min
Melt Flow Rate (200°C, 10.0 kg)No flow g/10min
Solution Viscosity (Toluene, 30°C)
Solution Viscosity (5 wt%)22 mPa·s
Solution Viscosity (10 wt%)460 mPa·s
Solution Viscosity (15 wt%)- mPa·s
Physical Form
Physical FormBlock/Pellet block
















































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