UV 1164 is one of the most powerful and durable UV absorbers, it derives from a hydroxyphenyl-S-triazine. Its absorbance ability is higher in the B region of UV radiation where the absorbance goes from 290 to 350 nm, with maximum absorbance at 342 nm. This is the wavelength where the most of ethylene polymers start to decompose.

The benefits of UV 1164 are: high light stability, minimum contribution to the final colour, the low interaction with metallic ions (like catalysis residues) and very low volatility that limits processing problems like plate out, surface imperfections and die lip building for the entire service life.

UV 1164 is the UV absorber of choice for greenhouses PE films used in very sunny areas. Moreover, UV 1164 is the most used UV absorber to increase the light fastness of many organic pigments and dyes, in the synthetic fibres (PP, PA, PET) mass dyeing.