Desenvolvimento e avaliação de formulação cosmética contendo argila bentonita

Abstract

The consumption of personal hygiene, perfumery and cosmetic items currently reaches positive numbers worldwide, and makeup cosmetic items reach 4th place in the consumption ranking in 2020. This data has caused an impact on the cosmetics segment industries, seeking bring to consumers new proposals for products whose formulation meets the needs of a wide variety of skin types and requirements, such as cosmetic products with mineral components acting as actives. After the approval of the cosmetic formulation studies in participants by the Ethics Committee of the Federal University of Paraíba (UFPB), the bentonite clay green sludge, originating from the municipality of Boa Vista-PB, was chosen as an object of study in order to observe its influence as a cosmetic active for facial foundation, evaluating possible benefits as an agent to control skin shine and oiliness. The clay in natura underwent a purification process and chemical modification through activation with Na2CO3, submitted to physicochemical characterization, for subsequent incorporation as an active in formulations, in three different concentrations and a control formulation, followed by emulsion stability studies, and rheological and microbiological analyses. A kinetic study of the skin was carried out, evaluating the performance of the facial foundation developed in controlling shine and oiliness¬¬ during 8 hours of application, in comparison with a commercial product of the same proposal. The characterization results showed improvements of the processed material in terms of cation exchange capacity, uniformity of particle size and reduction of accessory minerals. The formulation showed positive results in the accelerated stability test, remained rheologically stable and microbiologically suitable for application as a topical product. Bentonite clay proved to be an interesting asset in controlling the shine and oiliness of the skin, maintaining good levels of hydration and skin elasticity, reducing the appearance of pores and improving sensitivity, even when compared to a commercial product. It is important to emphasize a possible influence of clay on the control of facial pH. It was possible to prove that bentonite clay has potential of great interest when applied as a cosmetic active.