Today’s highlight is a triazine UV absorber

A triazine UV absorber has excellent properties. In addition, the dosage you need to put into your polymer is usually lower compared to other UV absorbers. For example, Benzophenone or Benzotriazole UV absorbers. We would like to put our Omnistab UV 1164 in the picture, starting with some key features:

• High UV absorption efficiency (less dosage with better effect)
• Low gloss to make it widely used
• High processing temperature
• Minimal color contribution
• Low interaction with metals
• Good compatibility
• Good dispersion where molecules are easy to modify
• Broad absorption spectrum
• Intended for use in contact with food

Absorption mechanism

The absorption mechanism of a triazine UV absorber is based on two parts. firstly, the conjugated π-electron architecture of the compound. Secondly, the structure capable of hydrogen migration.

An intramolecular hydrogen bond forms between the ortho-position hydroxyl group on the benzene ring and the nitrogen atoms on the adjacent triazine ring to form a hexatomic ring. And the hexatomic ring forms a conjugated system with the surrounding structure. The energy required to open the chelate ring is just close to the Ultraviolet energy in the range of UV A and UV B. When the molecule itself absorbs UV light, the molecular energy increases and the weakest N-H bond in the hexatomic ring breaks. The absorbed energy is released in the form of heat, fluorescence or phosphorescent. Certainly, harmless to the polymer. The material and the molecular structure recovers. Thus, absorbing a large amount of UV light repeatedly and protecting the polymer.

Applications

Compared to another triazine UV absorber, Omnistab UV 1577, the R1, R2, R3 and R4 of OMNISTAB UV1164 are all CH₃ instead of H. The substituent group of R5 has a longer molecular chain, which means that the Omnistab UV 1164 has a larger molecular weight and lower volatility. The difference in substitution group also makes UV 1164 applicable to a relatively wide range. For instance, nylon, PE, PC, PVC, PET, PBT, ABS and PMMA and other high-performance plastic products. Want to know more or send an inquiry? Contact us now!