Industry Overview
The asphalt and bitumen industry relies on high-performance resins to enhance mechanical strength, adhesion, and weather resistance in road and roofing applications.
Velrez hydrocarbon resins act as tackifiers and modifiers, improving viscosity, durability, and compatibility with polymers and bitumen blends.
Role of Hydrocarbon Resins in Asphalt
Hydrocarbon resins are used in asphalt because they provide:
- Improved adhesion to aggregates and substrates
- Enhanced cohesive strength for long-lasting pavements
- Increased thermal and UV stability
- Optimized viscosity for easy processing and application
- Compatibility with SBS, EVA, and other polymer-modified bitumens
- Resistance to rutting and deformation under traffic loads
Key Benefits for Asphalt
- Consistent performance in high-temperature road applications
- Improved adhesion and binder cohesion
- Enhanced durability under heavy traffic and UV exposure
- Optimized viscosity for bitumen modification and polymer blending
- Grades tailored for hot mix, cold mix, and polymer-modified asphalt
Recommended Resin Types
For asphalt and bitumen applications, the following Velrez hydrocarbon resin families are typically used:
- C9 Aromatic Resins – improve adhesion and mechanical strength
- MA-Modified C9 Resins – enhanced polarity for polymer-modified bitumen (PMB)
- Cycloaliphatic/Aromatic Thermal Resins – toughness and processability at high temperatures
- C5/C9 Modified Resins – balanced adhesion, flow, and thermal stability
Recommended Velrez Grades
| Grade | Type | Softening Point | Key Benefit | Typical Use |
| Velrez 9Z4-110 | C9 Aromatic | 105–115°C | adhesion | polymer-modified bitumen, asphalt modification |
| Velrez 9YMA4-140 | MA-Modified C9 | 135–145°C | polarity & adhesion | PMB, roofing membranes |
| Velrez TP9Q12-115 | Cycloaliphatic/Aromatic Thermal | 110–120°C | toughness | bitumen modification, alkyd paint blends |
| Velrez 9HZ4-110 | C5 Modified C9 | 105–115°C | balanced adhesion | bitumen-compatible adhesive formulations |
How Mardan Supports the Industry
Mardan BV provides:
- Technical advice to select the optimal resin for asphalt and PMB systems
- Reliable supply of Velrez resins across Europe
- Support for formulation, trials, and sampling
- Access to a full portfolio of C5, C9, hydrogenated, modified and thermal resins for bitumen and polymer-modified asphalt