UV Resistance Additive for Architectural Coatings
CAS Number: 2440-22-4
UV resistance additives for architectural coatings are combinations of UV absorbers (UVA, typically benzotriazole or triazine chemistry) and hindered amine light stabilizers (HALS) that protect waterborne paint films from photodegradation, chalking, and color fade on exterior surfaces. They absorb harmful UV radiation and quench free radicals generated by photolysis of the binder, significantly extending the service life of exterior architectural coatings. These stabilizer packages are optimized for use in acrylic and silicone-acrylic exterior facade systems.
Technical Specifications
| pH | 5.0–9.0 |
| appearance | Clear to pale yellow liquid or powder |
| activeContent | 50–100% |
| lightFastness | Blue wool scale ≥7 |
| recommendedDosage | 0.5–2.0% |
Applications
- Exterior facade and masonry coatings
- Exterior wood and trim coatings
- Roof coatings and membranes
- High-durability exterior finishes
- Color-critical architectural topcoats
Key Features
- Absorbs UV radiation to prevent binder degradation
- HALS radical quenching for long-term stability
- Reduces chalking and color fade on exterior surfaces
- Compatible with acrylic and silicone-acrylic binders
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CAS Number
2440-22-4
Category
Architectural Coating AdditivesAvailability
In StockSample
Dispatched within 5 days
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