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    • 5. 发明申请
    • Nanoparticle hybrid sunscreens
    • 纳米粒子混合防晒剂
    • US20100003204A1
    • 2010-01-07
    • US12459541
    • 2009-07-02
    • Douglas Anson LoyKenneth J. SheaDylan J. BodayJason T. Wertz
    • Douglas Anson LoyKenneth J. SheaDylan J. BodayJason T. Wertz
    • A61K8/02C01B33/12
    • C01B33/145A61K8/025A61K8/585A61K8/891A61K2800/412A61K2800/434A61K2800/612A61K2800/651A61Q17/04C01B33/146C01B33/148
    • The invention discloses and claims a new class of chemical compositions with ideal sunscreen properties. The chemical composition comprises spherical particles between 200 nm and 10 microns in diameter prepared by an emulsion polymerization of tetraalkoxysilanes or organotrialkoxysilanes or organobridged trialkoxysilanes with a dye monomer bearing two or more alkoxysilyl groups attached to the bridging chromophore. The resulting spheres absorb ultraviolet light. The dye can be any organic chromophore capable of receiving multiple trialkoxysilyl groups resulting in multipoint covalent attachment that precludes leaching of the dye from the spheres. The formic acid-toluene-monomer emulsion polymerization allows for large-scale (>100 gram) synthesis of monodisperse particles under acidic, non-aqueous conditions without surfactants. The particles less than 1 micron in diameter are smooth as talc to the touch and will provide a smooth formulation for sunscreen creams or lotions.
    • 本发明公开并要求具有理想的防晒性能的新一类化学组合物。 化学组成包括通过四烷氧基硅烷或有机三烷氧基硅烷或有机桥连三烷氧基硅烷与带有两个或多个连接到桥接发色团上的烷氧基甲硅烷基的染料单体的乳液聚合制备的直径在200nm和10微米之间的球形颗粒。 所得球体吸收紫外线。 染料可以是能够接受多个三烷氧基甲硅烷基的任何有机发色团,导致多点共价连接,其排除了染料从球体中浸出。 甲酸 - 甲苯 - 单体乳液聚合允许在无表面活性剂的酸性,非水性条件下大规模(> 100克)合成单分散颗粒。 直径小于1微米的颗粒作为滑石使其光滑滑动,并提供防晒霜或乳液的光滑配方。