Aminosalicylate ester in sunscreen compositions

Abstract From the Canadian patent

Alkyl esters of aminosalicylic acid said alkyl group having from 1 to 18, carbon atoms in chain length; alkenyl esters of aminosalicylic acid said, alkenyl group selected from the group consisting of vinyl allyl, undecenyl, oleyl and linolenyl groups and cyclic esters of aminosalicylic, acid said cyclic group being the cyclohexyl phenyl and menthyl groups, having ultra-violet screening properties to absorb light rays within the wave-length range of 2950 A. to 3200 A. while transmitting the light rays beyond the 3200 A. range to permit the desirable tanning of the skin without solar burn. The respective esters of aminosalicylic acid are prepared by the reduction of the appropriate …