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公开(公告)号：US4000317A
公开(公告)日：1976-12-28
申请号：US466937
申请日：1974-05-06
CPC分类号： A61Q19/10 , A61K8/25 , A61Q19/008 , A61K2800/412 , Y10S514/859
摘要： Sebum, the oily material secreted by the sebaceous glands, especially on the human face, is adsorbed by a thin layer of a pyrogenic colloidal silica of spherical shape and very small particle size. The pyrogenic colloidal silica has a high capacity for adsorbing the sebum and preventing it from exerting its oily effects on the skin. Free flow of sebum from the sebaceous gland is allowed but even in the cases of persons whose sebaceous glands are overactive, the skin is not excessively oily, due to the adsorption effects of the pyrogenic colloidal silica. The appearance of the facial skin of a user is improved, the surface of the skin is less apt to support harmful bacterial and fungal growth and, if make-ups containing dyes or pigments are employed, they are less apt to undergo color changes, due to the effects of oil thereon.Compositions that may be employed to apply the pyrogenic colloidal silica to the skin are non-oily, aqueous, alcoholic or aqueous alcoholic suspensions of the pyrogenic colloidal silica in certain ranges of concentrations thereof, which may include minor proportions of non-oily adjuvants, such as thickeners, solvents, emollients, pH modifiers, bactericides, drying agents and exfoliants.By use of a small amount of such a composition, sebum adsorption can be effected over daytime periods of from 4 to 12 hours, with no re-application required and the pyrogenic colloidal silica composition can be used in such small quantities as to be essentially invisible on the skin. Heavier applications may be employed overnight, when unobtrusiveness of the product is not as important.
摘要翻译： 皮脂，由皮脂腺特别是人脸分泌的油状物质被球形和非常小粒径的热解胶体二氧化硅的薄层吸附。 热解胶体二氧化硅具有高的吸附皮脂的能力并防止其对皮肤的油性作用。 允许皮脂从皮脂腺自由流动，但即使在皮脂腺过度活动的人的情况下，由于热解胶体二氧化硅的吸附作用，皮肤也不会过度油腻。 使用者的面部皮肤的外观得到改善，皮肤表面不易于支持有害的细菌和真菌生长，并且如果使用含有染料或颜料的化妆品，则它们不太容易发生颜色变化，因为 对油的影响。
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