Development of Long-Wearing Lipstick Using Self-Organizing Color Fix Polymers

概要

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A novel long-lasting lipstick has been developed using self-organizing silicone polymers. The polymer we adopted is polyoxyethylene modified organopolysiloxane (EOS). It is in a liquid state and soluble in common cosmetic oils under water-free conditions; it forms a gel-like film with a small amount of water that exists on the surface of the lips. This film is soft, flexible and yet tough enough to stay on the lip, holding the oils and pigments of the lipstick. The lipstick containing EOS exhibits excellent long-lasting properties; however, it tends to detach from the lip when oily or greasy food is eaten. To avoid this defect, another silicone polymer, alkylglyceryl ether modified organopolysiloxane (GES), is admixed with EOS. GES is soluble to EOS and helps the EOS gel to stably adhere to the surface of the lip. The lipstick containing the mixture of EOS and GES provides beautiful make-up appearance for a prolonged period of time even after an oily or greasy meal, and the color does not come off onto tableware such as coffee cups. Furthermore, unlike conventional lipstick containing a volatile oil, it provides a glossy application and a moist feeling.
日本化粧品技術者会の論文