O/W moisturizing emulsions with saccharose palmitate and saccharose stearate

The ability of two saccharose esters, saccharose palmitate (SMP) and saccharose stearate (SMS), to form lamellar structure in oil/water/glyceryl stearate mixtures was investigated through ternary phase diagrams. Three different oils have been tested: fluid paraffin, C12-15 alkylbenzoate, and cetearyl octanoate. On the basis of the phase behaviors several emulsions with liquid crystalline structure were obtained and then characterized. Furthermore the most stable ones were added with a moisturizing active, lauryl pyrrolidone (LP), or sodium-D,Lpyroglutamate (PCA). After the addition, the stability of the emulsions was assessed: It was observed that PCA-containing emulsions resulted as less stable compared to LP-containing ones.