05.12.23
US Patent No. 11,642,294 B2 (Stuart Campbell-Lee, Rupak Mitra, Thomas Richard Pointon, and Ian Peter Stott); Conopco, Englewood Cliffs, NJ (Unilever), has patented a personal care composition comprising an antimicrobial preservation system that contains itaconic acid or salt thereof, and benzoic acid or salt thereof. The weight ratio of itaconic acid or salt thereof to benzoic acid or salt thereof is from 1:8 to 8:1. The preservation system represents 0.05 to 5 weight percent of the total composition. The composition comprises at least 75 weight percent water by weight of the total composition.