TiO.sub.2 pigments resistant to discoloration in the presence of polymer
additives
    2.
    发明授权
    TiO.sub.2 pigments resistant to discoloration in the presence of polymer additives 失效
    在聚合物添加剂存在下耐变色的TiO2颜料

    公开(公告)号:US4999055A

    公开(公告)日:1991-03-12

    申请号:US404730

    申请日:1989-09-06

    IPC分类号: C08K9/04 C09C1/36 C09C3/08

    摘要: An improved inorganic pigment (e.g., TiO.sub.2), process for treating such pigment and polymer (e.g., polyethylene, polypropylene or polystyrene) incorporating such pigment wherein the inorganic pigment is coated with maleic, malonic, benzoic, fumaric, or phthalic acid or mixtures thereof. The coated pigments exhibit excellent resistance to polymer yellowing or discoloration and do not appear to degrade polymer properties.

    摘要翻译: 改进的无机颜料(例如TiO 2),用于处理这种颜料的方法和包含这种颜料的聚合物(例如聚乙烯,聚丙烯或聚苯乙烯),其中无机颜料涂覆有马来酸,丙二酸,苯甲酸,富马酸或邻苯二甲酸或其混合物 。 涂覆的颜料表现出优异的抗聚合物变黄或变色的性能,并不会降低聚合物性能。

    Titanium dioxide nanopowder manufacturing process
    4.
    发明授权
    Titanium dioxide nanopowder manufacturing process 失效
    二氧化钛纳米粉末制造工艺

    公开(公告)号:US07208126B2

    公开(公告)日:2007-04-24

    申请号:US10804277

    申请日:2004-03-19

    IPC分类号: C01G1/00 C01G23/00

    摘要: Titanium dioxide nanopowder is produced by a process, comprising: (a) reacting titanium tetrachloride and an oxygen containing gas in the vapor phase in a flame reactor, at a flame temperature of at least about 800° C. in the presence of (i) water vapor in an amount ranging from about 1000 to about 50,000 parts per million, based on the weight of titanium dioxide under production, (ii) a diluent gas in an amount greater than about 100 mole percent based on the titanium tetrachloride and oxygen containing gas and (iii) a nucleant consisting essentially of a cesium substance wherein the cesium substance is present in an amount ranging from about 10 to about 5000 parts per million, based on the weight of the titanium dioxide under production, the pressure of reaction being sufficient to form titanium dioxide nanopowder.

    摘要翻译: 二氧化钛纳米粉末通过一种方法制备,包括:(a)在火焰反应器中,在至少约800℃的火焰温度下,在(i)的情况下,在气相中使四氯化钛与含氧气体反应, 基于生产中的二氧化钛的重量,水蒸气的量为约1000至约50,000ppm,(ii)基于四氯化钛和含氧气体的量大于约100摩尔%的稀释气体 和(iii)基本上由铯物质组成的成核剂,其中铯物质的存在量为约10至约5000ppm,基于生产中的二氧化钛的重量,反应的压力足以 形成二氧化钛纳米粉末。