Document Type : Original Article
Chemical engineering branch, M.T.C., Cairo, EGYPT.
Solar radiation consists of a continuous spectrum of wavelengths ranging from infrared through visible light to the ultraviolet radiation region. The latter represents a challenge to certain commercial chemical compositions such as exterior paints, plastics, sunscreen cosmetics and others. Ultraviolet absorbers are such compounds added to the compositions in small percentage to protect them against their deterioration by UV radiation. Some oxazolone derivatives were prepared, purified and tested as UV absorbers as 0.02-2% solutions in organic solvents. The solvents used were: ethanol, toluene, acetone, benzyl alcohol, acetonitrile, THF, n-butanol and 1,4-dioxan. The transmittance was measured in the range of 200-400 nm. The effect of oxazolone derivative type and concentration in the given solvents were shown and discussed. The transmittance ranging between 0.3-1.9% of UV radiation in the range of 260-400 nm, depending on the solution.