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The control of ultraviolet radiation protection for polymers has become crucial because they dominate industries-from automotive parts to food packaging. Light stabilizers function as essential additives which protect materials from UV radiation damage to maintain their performance and durability. Alfa Chemistry delivers state-of-the-art UV absorbers (UVA) and Hindered Amine Light Stabilizers (HALS) designed to address unique requirements across various industries.
Polymers undergo photodegradation from UV radiation which results in discoloration and surface cracking along with decreased mechanical strength. For instance, PVC pipes that receive sunlight exposure emit toxic HCl gas which speeds up their degradation process. The actions of light stabilizers to fight degradation rely on two fundamental processes.
Function: Absorb UV radiation (290–400 nm) and dissipate it as thermal energy.
Key Products:
Applications: Automotive coatings, agricultural films, and outdoor furniture.
Function: Inhibit oxidation by trapping free radicals and regenerating active amine groups.
Key Products:
Applications: PVC window profiles, polypropylene fibers, and engineering plastics.
Selecting the optimal light stabilizer depends on your polymer type, application environment, and performance requirements. Below, we break down Alfa Chemistry's featured UV absorbers and HALS to help you make informed decisions.
UV absorbers shield polymers by converting UV radiation into harmless heat. Alfa Chemistry's range includes:
| Category | Product | Key Features | Price |
| Benzophenones | UV-531 | Ideal for polyolefins (PP, PE) and food-contact applications. | Inquiry |
| UV BP-6 | Cost-effective options for PVC films and low-density plastics. | Inquiry | |
| BP-8 (UV-24) | Inquiry | ||
| Benzotriazoles | UV-326 | High-performance choices for automotive coatings (PU, ABS) and engineering plastics. | Inquiry |
| UV-328 | Inquiry | ||
| UV-329 | Excellent thermal stability for thick-section polymers like PET and PC. | Inquiry | |
| UV-3529 | Inquiry | ||
| UV-234 | Broad-spectrum protection for high-clarity films and outdoor textiles. | Inquiry | |
| UV-360 | Inquiry | ||
| Triazines | UV-1577 | Superior UV resistance for automotive paints and aerospace composites. | Inquiry |
| UV-1164 | Inquiry | ||
| UV-3035 | Low volatility, ideal for high-temperature processing (e.g., engineering resins). | Inquiry | |
| Niche Formulations | UV Absorber 8080 | Specialized for liquid coatings and adhesives. | Inquiry |
| UV-1130 | Inquiry | ||
| UV Absorber 950 | Tailored for UV-curable resins and 3D printing materials. | Inquiry |
HALS neutralize free radicals and regenerate over time, offering long-term protection. Alfa Chemistry's HALS portfolio includes:
| Category | Product | Key Features | Price |
| Low-Molecular-Weight HALS | Light Stabilizer 770 (HS-770) | Perfect for thin films (agricultural mulch) and fibers (PP, nylon). | Inquiry |
| HALS HS-112 | Low volatility, suitable for automotive interior plastics (e.g., PP/EPDM). | Inquiry | |
| Polymeric HALS | HALS HS-944 | Exceptional thermal stability for thick-section polymers like PVC window profiles and automotive parts. | Inquiry |
| Light Stabilizer LS-944 | Inquiry | ||
| Light Stabilizer 2020 | High compatibility with polyolefins and engineering plastics (PA, PBT). | Inquiry | |
| Light Stablizer UV-622 | Inquiry | ||
| Synergistic Blends | HALS HS-508 (292) | Combines radical scavenging with antioxidant properties for polyurethane foams and elastomers. | Inquiry |
| UV-400 | Hybrid UVA-HALS system for enhanced photostability in automotive coatings. | Inquiry |
| Light stabilizers | Mechanical properties | Aging Time in Natural Light Exposure | ||||||
| Initial | 20 days | 40 days | 60 days | 80 days | 100 days | 120 days | ||
| Blank control | Tensile strength (MPa) | 45.3 | 43.5 | 40.6 | 36.8 | 34.2 | 31.6 | 28.7 |
| Impact strength (KJ/m2) | 34.5 | 30.2 | 26.5 | 23.5 | 21.3 | 20.2 | 19.8 | |
| UV-531 | Tensile strength (MPa) | 45.3 | 44.5 | 43.3 | 41.8 | 39.8 | 37.6 | 35.5 |
| Impact strength (KJ/m2) | 34.7 | 32.5 | 30.5 | 28.8 | 7.2 | 25.8 | 24.6 | |
| UV-9 | Tensile strength (MPa) | 45.4 | 44.2 | 42.5 | 40.2 | 37.5 | 35.0 | 32.2 |
| Impact strength (KJ/m2) | 34.5 | 31.6 | 29.0 | 26.6 | 24.5 | 23.0 | 21.9 | |
| UV-327 | Tensile strength (MPa) | 45.6 | 45.2 | 44.3 | 43.0 | 41.5 | 39.4 | 37.6 |
| Impact strength (KJ/m2) | 34.6 | 32.8 | 31.5 | 30.8 | 29.9 | 28.8 | 27.8 | |
