利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

67 条记录 (耗时 0.035 秒)

    Titanium dioxide coated with silicon dioxide
    5.
    发明申请
    Titanium dioxide coated with silicon dioxide 有权
    二氧化钛涂覆二氧化硅

    公开(公告)号：US20060057385A1

    公开(公告)日：2006-03-16

    申请号：US10539061

    申请日：2003-12-02

    申请人： Kai Schumacher ,  Christoph Batz-Sohn ,  Steffen Hasenzahl

    发明人： Kai Schumacher ,  Christoph Batz-Sohn ,  Steffen Hasenzahl

    IPC分类号： C09C1/36 ,  B32B5/16

    CPC分类号： C09C1/3661 ,  C01G23/07 ,  C01P2004/03 ,  C01P2004/84 ,  C01P2006/12 ,  C01P2006/90 ,  Y10T428/2993

    摘要： Powder consisting of particles with a core of titanium dioxide and a coating of silicon dioxide, which powder has a content of silicon dioxide of between 0.5 and 40 wt. %, a BET surface of between 5 and 300 m2/g, and which consists of primary particles that have a coating of silicon dioxide and a core of titanium dioxide. The powder is produced according to a process in which a vaporisable silicon compound and a vaporisable titanium compound are mixed corresponding to the subsequently desired ratio of SiO2 and TiO2 in the product, are vaporised at temperatures of 200° C. or less, and conveyed by means of an inert gas stream together with hydrogen and air or with oxygen-enriched air to the central pipe (core) of a known burner, the reaction mixture is ignited at the mouth of the burner and introduced together with secondary air, is combusted in a cooled flame pipe, following which the titanium dioxide powder coated with silicon dioxide is separated from the gaseous reaction products and if necessary is freed in moist air from adhering hydrogen chloride, the ratio of primary air to secondary air being greater than 0.3, the ratio of core hydrogen to secondary air being greater than 1, and the ratio of titanium dioxide precursor to secondary air being greater than 0.5. Sunscreen agent containing the powder in an amount of between 0.01 and 25 wt. %.

    摘要翻译： 由具有二氧化钛核心和二氧化硅涂层的颗粒组成的粉末，该粉末的二氧化硅含量为0.5〜40重量％。 ％，BET表面积在5和300m 2 / g之间，并且其由具有二氧化硅涂层和二氧化钛核心的一次粒子组成。 该粉末根据其中可蒸发的硅化合物和可蒸发的钛化合物混合的方法制备，相应产物中随后所需的SiO 2和TiO 2的比例 ，在200℃或更低的温度下蒸发，并通过惰性气体流与氢气和空气或富氧空气一起输送到已知燃烧器的中心管（核心）上，将反应混合物点燃 在燃烧器的口处并与二次空气一起引入，在冷却的火焰管中燃烧，随后将二氧化硅涂覆的二氧化钛粉末与气态反应产物分离，如果需要，在潮湿的空气中从附着的氯化氢 ，一次空气与二次空气的比例大于0.3，核心氢气与二次空气的比例大于1，二氧化钛前体与二次空气的比例大于0.5。 含有粉末的防晒剂的量为0.01至25wt。 ％。