01.04.18
US Patent No. 9,820,920 B2; L’Oréal, Paris, has patented a process for making a sunscreen composition that is comprised of an aqueous phase; an oil phase comprising at least one cosmetically acceptable oil; at least one sunscreen active; an emulsifier system comprising at least one ionic surfactant, at least one nonionic surfactant having an HLB of greater than or equal to about 14; and at least one nonionic surfactant having an HLB of less than or equal to about 10; and combining those ingredients. The sunscreen composition has approximately 12% to about 25% by weight sunscreen active or 25-40% by weight sunscreen active, based on the total weight of the composition. The composition is a stable oil-in-water emulsion containing oil droplets having an average particle size of from about 100 to 15 nm, is denatured alcohol-free and appears semi-transparent to transparent upon application and is stable.
