07.29.22
US Patent No. 11,389,382 B2 (Rebecca Chen, Seung Ook Yang, Anne-Laure Suzanne Bernard); L'Oréal, Paris, has patented a biphasic skin peel composition. It is comprised of at least one alpha hydroxy acid selected from the group consisting of lactic acid, glycolic acid, tartaric acid, mandelic acid, citric acid, ester derivatives thereof, and combinations thereof; at least one beta hydroxy acid selected from the group consisting of salicylic acid, beta-hydroxypropionic acid, beta-hydroxybutyric acid, beta-hydroxy beta-methylbutyric acid, carnitine, and combinations thereof; at least one non-water miscible oil including an oil selected from the group consisting of isopropyl myristate, isononyl isononanoate, dicaprylyl carbonate, and combinations thereof; phenylethyl resorcinol; water; and alcohol selected from the group consisting of monohydric C1-C8 alcohols, benzyl alcohol, phenylethyl alcohol, and combinations thereof.
The composition has a pH of at least 3.5; wherein the at least one alpha hydroxy acid, the at least one beta hydroxy acid, the phenylethyl resorcinol, the water, and the alcohol are present in a water phase, the at least one non-water miscible oil is present in an oily phase, and the water phase and oil phase are present as two distinct non-emulsified phases. The water and oily phases are present in equal amounts (about 1:1).
The biphasic skin peel composition has improved peel efficacy at the same or lower acid levels relative to a comparative Jessner peel including additional water in lieu of non-water miscible oil, according to the patent filing.
The composition has a pH of at least 3.5; wherein the at least one alpha hydroxy acid, the at least one beta hydroxy acid, the phenylethyl resorcinol, the water, and the alcohol are present in a water phase, the at least one non-water miscible oil is present in an oily phase, and the water phase and oil phase are present as two distinct non-emulsified phases. The water and oily phases are present in equal amounts (about 1:1).
The biphasic skin peel composition has improved peel efficacy at the same or lower acid levels relative to a comparative Jessner peel including additional water in lieu of non-water miscible oil, according to the patent filing.