Fluid formulas are generally well appreciated by consumers as they encourage even and smooth application. However, the main difficulty with this area is the combining of good flowing properties with reproducible viscosities and good stability, especially at high temperatures.
Polymeric thickeners are widely used to stabilise cosmetic formulations but most of them are not very suitable for fluid formulations due to low reproducible results in a low viscosity range, and complicated handling procedures. The purpose of this study is to demonstrate the effectiveness of two new thickening-emulsifying polymers manufactured by inverse emulsion polymerisation to support fluid and stable formulations. A second objective of the study is to see how the synthesis parameters could affect the application properties of two polymers developed on a similar chemical structure. Finally, the aim is to clarify how to choose between these two polymers according to the technical brief and to advise the best handling procedure.
Materials and methods
Materials
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