| abstract |
This invention relates to non-hydrolyzable, non-irritating, hair, skin and textile substantive quaternary ammonium salts of a para-dialkylamino benzamide having the formula <IMAGE> wherein R' and R'' are each selected from the group of C1 to C2 alkyl; n is an integer having a value of from 2 to 6; R is an alkyl radical having from 1 to 30 carbon atoms; R1 and R2 together with the attached cationic nitrogen atom forms a 5 to 6-membered heterocyclic ring containing a hetero oxygen atom in addition to the heteronitrogen atom and is selected from the group of <IMAGE> and X is an anion. These benzamide heterocyclic derivatives are active sunscreening agents which are usefully employed at a concentration of from about 0.5 to about 10 wt. % in a formulation requiring protection against the harmful effects of sunlight, such as skin burn, hair damage, color fading, etc. |