A Study on the Interfacial Properties of Glycereth-25 PCA Isostearate and Their Application in Skin Care Cosmetics

This study reports the results of a study on the interfacial properties of glycereth-25 PCA isostearate and its skin care cosmetic formulation application.This raw material is an amino acid-based surfactant, which is a natural moisturizing factor (NMF), and has properties of both soluble and emulsifying power and moisturizing effects. The organic property value (OV) of this raw material was 1460, the inorganic property value (IV) was 2085, and the obtained IOB value was 1.42. Since the IOB value was 1 or more, it was interpreted as having excellent hydrophilic available thermal power. In addition, it was found that the HLB value obtained by calculating the molecular weight of lipophilic and hydrophilic was 14.0 to 14.4 (average 14.2). It was found that the concentration of the solubilizing agent used to dissolve 0.1% of Bergamot oil was transparently dissolved at 0.5%. In addition, the concentration of this surfactant used to emulsify 20% of caprylic/capric triglyceride oil was capable of stable emulsification at 2%. As an application in skin care cosmetics, it is effective in developing transparent solubilized formulations and is expected to be widely applied as a main surfactant in developing moisturizing emulsified lotions, essence, and cream formulations. As a surfactant with strong hydrophilicity, it is expected to be effective in making a D-phase emulsification nanoemulsion.