SYNTHESIS AND CHARACTERIZATION OF FLUORINE CON TAINING ULTRAVIOLET RADIATION ABSORBERS.
Rept. for 1 Jan 62-1 Jan 63,
DENVER RESEARCH INST CO
Pagination or Media Count:
A series of fluoro and trifluoromethyl sub stituted 2-hydroxy-4-methoxybenzophenones was synthesized in order to ascertain the effect of such substitution on the a spectral properties, and b evaporation rates as compared to 2-hydroxy-4-methoxybenzophenone, a commerically available and widely used ultraviolet absorber. Three of the six compounds chosen for the most intensive study were less volatile than either 2-hydroxy-4-methoxybenzophenone or 2,4-dihydroxy benzophenone, and three were more volatile. The infrared, ultraviolet and nuclear magnetic resonance spectra of these compounds were ob tained and are discussed. The three new ultra violet absorbers, 2-hydroxy-4-methoxy-2-tri fluoromethylbenzophenone, 2-hydroxy-4-methoxy 3-fluorobenzophenone, and 2-hyd-methoxy 4-fluorobenzophenone, with low evaporation rates have ultraviolet absorption spectra similar to 2-hydroxy-4-methoxybenzophenone. Author