Styrene Isoprene Styrene (SIS)

Copolymer Styrene Isoprene Styrene (SIS) is a thermoplastic copolymer that belongs to the family of styrene block copolymers (SBCs). It is known for its elastomeric properties, excellent flexibility, and compatibility with a wide range of materials. SIS copolymers are widely used in various industries for applications requiring adhesiveness, flexibility, and resilience.

Applications

SIS copolymers find applications in numerous industries and scenarios, including:

• Adhesives and Sealants: SIS copolymers are widely used in the formulation of adhesives and sealants. They provide excellent tackiness, flexibility, and adhesion properties, making them suitable for a broad range of bonding applications in industries such as packaging, automotive, construction, and more.
• Bitumen & Asphalt Applications: In the construction and infrastructure industries, SIS copolymers are added to bitumen and asphalt mixtures to enhance their performance. These copolymers improve the elasticity and durability of asphalt, making it suitable for road construction, pavement repair, roofing materials, and waterproofing applications.

Unique Properties

SIS copolymers offer unique properties and advantages, including:

• Elasticity: They exhibit excellent elasticity and resilience, making them suitable for flexible and stretchable applications.
• Adhesion: SIS copolymers have good adhesion properties, allowing them to bond well with various substrates.
• Flexibility: They are highly flexible, even at low temperatures, making them suitable for applications requiring pliability.
• Solvent Compatibility: SIS copolymers are compatible with a wide range of solvents, allowing for easy formulation of adhesives and coatings.
• Thermoplastic Processing: They can be processed using thermoplastic processing methods such as extrusion, injection molding, and film blowing.

Alternative for

The choice of using SIS copolymers depends on specific application requirements, including elasticity, adhesion, and flexibility. Alternatives may include other styrene block copolymers like styrene-butadiene-styrene (SBS) or styrene-ethylene-butylene-styrene (SEBS), depending on the desired characteristics and cost considerations. The selection is influenced by factors such as the operating environment, regulatory requirements, and the need for specific material properties. SIS copolymers are preferred when their unique combination of elastomeric properties and adhesion aligns with the application's needs, particularly in adhesive, sealant, and elastomeric product applications.