title: Transparent gels: study of their formation and assimilation of active ingredients through phase diagrams.
abstract: Synopsis Multicomponent gel formulations capable of assimilating, simultaneously, several active ingredients of potential application in the cosmetic field were studied. The possibility of formation of a transparent gel was determined using a method which consisted in the optimization of several lipophilic basic compositions, composed of oil, a mixture of surfactants, a sunscreen agent, several vitamins and antioxidants situated in the base of a regular tetrahedron that symbolized the considered system. To this, a polar phase made of water, a cosolvent and urea in appropriate proportions and situated in the fourth vertex, was progressively added. It may be concluded, that the use of phase diagrams on cosmetic systems, constitutes a useful way to select the components and their mutual ratios, allowing an adaptation to the specific requested conditions of formulation.
authors.affiliation: Instituto de Tecnologia Quimica y Textil (CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Comelles
authors.forename: J
authors.initials: J
authors.lastname: Caelles
authors.forename: J L
authors.initials: JL
authors.lastname: Parra
authors.forename: J S
authors.initials: JS
authors.lastname: Leal