24/04/2026
The selection of UV absorbers in polymer systems goes far beyond basic additive choice — it is a critical decision that directly impacts polymer stability, durability, and long-term performance.
UV radiation (280–400 nm), combined with heat, oxygen, and environmental stress, initiates photochemical degradation, leading to chain scission, free radical formation, oxidation, surface cracking, discoloration, and loss of mechanical properties.
Different classes of UV absorbers — benzophenone, benzotriazole, and triazine-based (HPT) — operate through distinct photophysical mechanisms, including π→π transitions, intramolecular proton transfer (IPT), and non-radiative energy dissipation*. These mechanisms determine their UV absorption efficiency, photostability, volatility, migration resistance, and long-term weatherability.
Advanced systems such as benzotriazole UV absorbers offer strong absorption in the 300–400 nm range, while triazine-based UV absorbers provide broad-spectrum protection, high thermal stability, and superior performance in demanding outdoor applications.
For optimal polymer stabilization, UV absorbers are often used alongside HALS (Hindered Amine Light Stabilizers) to ensure both surface protection and bulk stabilization, improving resistance to photo-oxidation, mechanical degradation, and environmental exposure.
From polyolefins (PE, PP) to PVC, polycarbonate, coatings, films, and engineering plastics, selecting the right UV absorber requires careful consideration of polymer compatibility, processing conditions, absorption spectrum, and long-term application requirements.
At OMNIQUAN, our advanced UV absorber solutions are designed to deliver high efficiency, excellent thermal stability, low volatility, and superior compatibility, ensuring extended polymer lifespan and reliable performance in UV-intensive environments.
