METAL OXIDE COATING OF WATER INSOLUBLE INGREDIENTS
    22.
    发明申请
    METAL OXIDE COATING OF WATER INSOLUBLE INGREDIENTS 有权
    水不溶性成分的金属氧化物涂层

    公开(公告)号:US20090081262A1

    公开(公告)日:2009-03-26

    申请号:US11997823

    申请日:2006-08-02

    Abstract: The invention relates to process for coating a solid, water-insoluble particulate matter, with a metal oxide comprising: (a) contacting the solid water-insoluble particulate matter with a cationic additive in an aqueous medium to obtain a dispersion of said particulate matter having a positive zeta potential; (b) coating the solid water-insoluble particulate matter by precipitation of a metal oxide salt onto the surface of the particulate matter, forming a metal oxide layer thereon; and (c) aging said coating layer The invention further relates to coated particulate matter obtained by the process and to compositions comprising solid, water-insoluble particulate matter, coated by a metal oxide layer, the particulate matter being a dermatological active agent or a pesticide. The invention additionally relates to methods of treating a surface condition in a subject using compositions comprising solid, water insoluble dermatologically active agent, coated by a metal oxide layer.

    Abstract translation: 本发明涉及一种用金属氧化物涂覆固体,不溶于水的颗粒物质的方法,包括:(a)将固体不溶于水的颗粒物质与阳离子添加剂接触在水性介质中,以获得具有 正ζ电位; (b)通过将金属氧化物盐沉淀到颗粒物质的表面上来涂覆固体不溶于水的颗粒物质,在其上形成金属氧化物层; 和(c)老化所述涂层本发明还涉及通过该方法获得的包覆颗粒物质和包含由金属氧化物层涂覆的固体,水不溶性颗粒物质的组合物,所述颗粒物质是皮肤病学活性剂或农药 。 本发明还涉及使用包含由金属氧化物层涂覆的固体,水不溶性皮肤病学活性剂的组合物来治疗受试者的表面状况的方法。

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