SEPTON™ 4077 is a SEEPS styrenic thermoplastic elastomer of Kuraray’s 4000 series with 30% styrene content. It features ultra-high solution viscosity, high transparency after oil filling, fast oil absorption rate, excellent oil retention and PE compatibility, no melt flow under standard conditions, superior heat/weather resistance and electrical insulation, ideal for high-transparency gel, high-performance adhesives and polymer modification of high-end polyolefin systems.
30% styrene content with SEEPS structure, delivering ultra-high solution viscosity and excellent mechanical properties vs traditional SEBS.
Ultra-high transparency after oil filling, fast oil absorption rate and excellent oil retention capacity, maintaining stable performance in high oil-filled formulations for long-term use.
Good compatibility with polyethylene (PE), realizing efficient blending with polyolefin resins and performance enhancement of composite systems.
No melt flow under standard test conditions, high molecular weight with stable physical and chemical properties in harsh service environments.
Superior heat, weather and chemical resistance, no plasticizer added, environmentally friendly and suitable for high-end formulation preparation.
High-transparency gel products: Used in electronic potting gel, high-transparency jelly wax and medical gel pads with excellent oil retention and transparency.
High-performance adhesives and sealants: Formulated into structural adhesives and high-end sealants for aerospace, automotive and electronic fields with good bonding and sealing performance.
Polyolefin polymer modification: Serves as a toughening modifier for PE/PP blends to improve tensile strength and environmental stress cracking resistance.
High-end automotive components: Applied in oil seals, engine compartment gaskets and wire cable insulation for oil resistance and high-temperature stability.
Protective coatings: Compounded into chemical-resistant protective coatings for metal and plastic substrates in industrial harsh environments.
| Physical Properties | |
| Styrene Content | 30 wt% |
| Density | 0.91 g/cm³ |
| 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%) | 300 mPa·s |
| Solution Viscosity (10 wt%) | - mPa·s |
| Solution Viscosity (15 wt%) | - mPa·s |
| Physical Form | |
| Physical Form | Block/Crumb |
Q1: What is the primary function of SEPTON™ 4077 in polymer formulations?
A: SEPTON™ 4077 is a thermoplastic elastomer (TPE) based on hydrogenated styrenic block copolymers, designed primarily to enhance impact resistance and low-temperature toughness in rigid thermoplastics—especially polypropylene (PP) and polyethylene (PE)—without significantly compromising stiffness or processability.
Q2: Is SEPTON™ 4077 compatible with polypropylene homopolymers and copolymers?
A: Yes—SEPTON™ 4077 exhibits excellent compatibility with both PP homopolymers and ethylene-propylene copolymers. Its hydrogenated structure and balanced polarity promote good interfacial adhesion, enabling effective dispersion and stress transfer during melt processing.
Q3: How does SEPTON™ 4077 compare to conventional EPDM-based impact modifiers?
A: Unlike EPDM rubber, SEPTON™ 4077 offers superior melt flow consistency, narrower molecular weight distribution, and improved thermal stability during compounding. It also provides more predictable and uniform morphology development in PP matrices, leading to enhanced balance between impact strength and dimensional stability.
Q4: What processing methods are recommended for incorporating SEPTON™ 4077 into thermoplastic systems?
A: SEPTON™ 4077 is optimized for standard thermoplastic processing techniques—including twin-screw extrusion, injection molding, and blow molding. It demonstrates good thermal stability up to typical PP processing temperatures and requires no special drying prior to use under normal ambient conditions.
Q5: Can SEPTON™ 4077 be used in applications requiring regulatory compliance for indirect food contact?
A: SEPTON™ 4077 is manufactured using raw materials compliant with major global food-contact regulations for polymers, and it is commonly selected for food packaging applications where impact-modified PP is permitted. Final regulatory approval depends on the complete formulation, processing conditions, and end-use requirements.
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
Have a Questions? Call Us:
Add:
Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
English
Español
tiếng việt
русский
