Description

A-B-A Triblock Copolymer CAS NO 78967-00-7 is a versatile class of thermoplastic elastomers characterized by a unique molecular architecture where a central polymer block (B) is flanked by two identical end blocks (A). This structure is fundamental to its exceptional performance, providing a balance of elasticity, strength, and processability not found in simple homopolymers. It is a critical material for formulators and manufacturers seeking to enhance the mechanical properties, durability, and functionality of their products across advanced industries.

Application

• Adhesives, Sealants, and Coatings (ASC): As a key polymer modifier to improve tack, peel strength, and flexibility in pressure-sensitive adhesives, hot-melt adhesives, and high-performance sealants.
• Polymer Modification and Compounding: Used as a compatibilizer and impact modifier to toughen engineering plastics (e.g., polystyrene, polypropylene) and improve the properties of bitumen for road paving.
• Medical and Pharmaceutical Devices: Employed in the manufacture of medical tubing, syringe components, and drug delivery matrices due to its biocompatibility, clarity, and flexibility.
• Footwear and Consumer Goods: Serves as a primary component in shoe soles, grips, and soft-touch overmolds, providing excellent cushioning, abrasion resistance, and design flexibility.
• Automotive Components: Utilized in interior trim, gaskets, and noise-dampening materials where a combination of softness, durability, and vibration absorption is required.
• Packaging Films: Acts as an elastomeric component in multilayer films to enhance tear resistance, elasticity, and cling properties for food and industrial packaging.

Basic Information

Product Name	A-B-A Triblock Copolymer
CAS No.	78967-00-7
Molecular Formula	Contact for details
Molecular Weight	Varies by grade (Typical range: 50,000 - 200,000 g/mol)
Synonyms	Styrenic Block Copolymer (SBC); Thermoplastic Elastomer (TPE); Polystyrene-block-polybutadiene-block-polystyrene (SBS); Polystyrene-block-polyisoprene-block-polystyrene (SIS); SEBS (Hydrogenated SBS); SEPS (Hydrogenated SIS); Kraton™ (Trade Name); Styroflex® (Trade Name); Vector® (Trade Name); TPE-S
EINECS	Contact for details

Quality Control

Our A-B-A Triblock Copolymer is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistency in molecular weight, block ratio, melt flow, and mechanical properties. Certificates of Analysis (COA) detailing key specifications are provided with every shipment. We can support compliance with relevant regulatory frameworks such as FDA, USP, and REACH for specific grades upon request.

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 an inert atmosphere to prevent oxidative degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow pellets or crumbs
Identification (IR)	Conforms to structure
Styrene Content	20% - 40% (Grade dependent)
Melt Flow Rate (MFR)	2 - 30 g/10 min (230°C/5kg)
Tensile Strength	10 - 30 MPa
Elongation at Break	500 - 1000%
Volatile Content	< 0.5%
Ash Content	< 0.1%

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