Description

Butylene/Ethylene/Styrene Copolymer is a high-performance thermoplastic elastomer engineered for superior flexibility and durability. This versatile polymer is valued for its excellent balance of processability, impact resistance, and weatherability, making it a critical component in demanding formulations. Key industries that utilize this advanced material include automotive manufacturing, construction, and specialty adhesives and sealants, where its unique properties enhance product performance and longevity.

Application

• Automotive Components: Used in weatherstripping, seals, gaskets, and interior trim for its flexibility and resistance to compression set.
• Polymer Modification: Acts as an impact modifier and compatibilizer in blends with polyolefins (PP, PE) and engineering plastics.
• Adhesives & Sealants: Serves as a key polymer base in hot-melt and pressure-sensitive adhesives, as well as construction sealants, providing tack and elasticity.
• Wire & Cable Insulation: Employed as an insulating and jacketing material due to its good electrical properties and environmental stress crack resistance.
• Footwear: Used in soles and other components for its cushioning, flexibility, and abrasion resistance.
• Consumer Goods: Found in grips, handles, and soft-touch overmolding for enhanced ergonomics and durability.

Basic Information

Product Name	Butylene/Ethylene/Styrene Copolymer
CAS No.	68648-89-5
Molecular Formula	(C4H8·C2H4·C8H8)x
Molecular Weight	Varies (Polymer)
Synonyms	Styrene-Ethylene-Butylene-Styrene Copolymer; SEBS Copolymer; Poly(styrene-block-ethylene-co-butylene-block-styrene); Thermoplastic Elastomer, SEBS; Kraton G Series (Trade Name); Tuftec (Trade Name); Septon (Trade Name); Ethylene/Styrene/Butylene Terpolymer
EINECS	Contact for details

Quality Control

Our Butylene/Ethylene/Styrene Copolymer is manufactured under a stringent quality management system. Each batch is tested against critical parameters including styrene content, melt flow index, and mechanical properties to ensure consistent performance. Certificates of Analysis (COA) detailing lot-specific results are provided with every shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and open flame. For long-term storage, consider using under an inert atmosphere to prevent oxidative degradation.

Specification

Item	Specification
Appearance	White to off-white pellets or granules
Styrene Content	20 - 40%
Melt Flow Rate (230°C/2.16 kg)	1 - 30 g/10 min
Specific Gravity	0.90 - 0.95
Hardness (Shore A)	30 - 80
Tensile Strength	> 10 MPa
Elongation at Break	> 400%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.