Polymer Modifiers
SBS Polymer Additive (Thermoplastic Elastomer Bitumen Modifier)
SBS Polymer Additive is a thermoplastic elastomer built from styrene-butadiene-styrene (SBS) linear block copolymer, used to improve the elasticity and temperature performance of bitumen in polymer-modified bitumen (PMB) production.
Produced by block polymerization of styrene and butadiene in hydrocarbon solution in the presence of an alkyllithium catalyst, it is dusted with a non-staining calcium stearate or amorphous silica stabilizer.
What Is SBS Polymer Additive?
SBS (styrene-butadiene-styrene) is a linear block copolymer that combines rigid styrene blocks with flexible butadiene blocks, giving it both plastic processability and rubber-like elasticity. When blended into hot bitumen, SBS forms a continuous polymer network within the binder that improves elastic recovery, low-temperature flexibility, and high-temperature stability.
SBS modification is widely used in pavements subject to heavy traffic loading, sustained heavy-vehicle traffic, or wide service temperature ranges — conditions standard bitumen can't meet alone. The product is dusted with a non-staining calcium stearate or amorphous silica stabilizer to prevent caking and clumping, keeping plant dosing clean and consistent.
| Property | Value |
|---|---|
| Appearance | White to light beige crumb or powder |
| Packaging | 900 kg pallet or big bag |
| Shelf Life | 1 year from date of production |
| Storage | Max. 40°C, protected from direct sunlight and precipitation |
| Application | Polymer-modified bitumen (PMB), SBS-modified asphalt, pavement performance enhancement |
Key Benefits
- Improves bitumen's elastic recovery and temperature performance range
- Enhances resistance to high-temperature rutting and low-temperature cracking
- Non-staining stabilizer dusting for clean, consistent plant dosing
- Compatible with standard bitumen modification equipment
Applications
- Polymer-modified bitumen (PMB) production
- SBS-modified asphalt mixes
- Pavement performance enhancement
- Heavily trafficked highway and airfield pavements