A Novel Functional Film Technology Utilizing the Properties of Polymeric Composite Film Formers: Development of Mascara Formulation Possessing Both Water Resistance and Removal Function by Hot Water

Abstract

The macroscopic structure of the film forming polymers utilized in cosmetics can be roughly classified into three categories: linear, branched, and particulate, and the degree of intermolecular interaction differs depending on the structure, resulting in different film properties for each. In addition to this morphology, we need to take into account the chemical structure, a microscopic factor that determines the polarity of the film. In order to develop functional films suitable to specific purposes, we have examined the development of new functions by polymer composites and their applications using these properties. Mascara is one of the formulations in which the properties of the film formers are directly related to the function. In addition to lash curl retention, mascara must have both excellent water resistance and easy rinsability, which are contradictory properties. In order to realize such functions, we investigated a new film-forming technology utilizing the characteristics of originally developed raw materials, and achieved the desired effects by combining an ingredient with amphiphilic properties to form hydrophilic domains in the hydrophobic film to achieve both high durability and excellent curl retention. The amphiphilic polymer plays a role as a trigger ingredient having excellent affinity with water that destroys the film, and also as an ingredient with temperature responsiveness.