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    DRY-PROCESS FINE SILICA PARTICLE
    2.
    发明公开
    DRY-PROCESS FINE SILICA PARTICLE 有权
    TROCKENVERFAHREN ZUR HERSTELLUNG VON SILICIUMDIOXIDTEILCHEN

    公开(公告)号：EP2028158A1

    公开(公告)日：2009-02-25

    申请号：EP07744191.3

    申请日：2007-05-22

    申请人： Tokuyama Corporation

    发明人： OHARA, Masakazu ,  TAKATA, Yukihiro ,  AOKI, Hiroo ,  UEDA, Masahide

    IPC分类号： C01B33/18 ,  C08K3/36 ,  C08L101/00 ,  G03G9/08

    CPC分类号： C08K3/36 ,  C01B33/181 ,  G03G9/09725 ,  Y10T428/2982

    摘要： Fine dry silica particles are produced by combustion by using a burner of a multiple-pipe structure, feeding a mixed gas of a gas of a siloxane compound without containing halogen in the molecules thereof and an oxygen gas at a ratio of 0.3 to 1. 5 into the center pipe of a burner, and feeding a combustible gas into the first annular pipe on the outer side of the center pipe of the burner. The fine dry silica particles has a BET specific surface area of 20 to 55 m 2 /g, and wherein the water suspension containing the fine silica particles at a concentration of 1.5% by weight has an optical absorbance τ for the light of a wavelength of 700 nm satisfying the following formula (1): τ ≦ 240 ⁢ S - 1.4 - 0.07
    wherein S is the BET specific surface area (m 2 /g) of the fine dry silica particles.
    The fine dry silica particles do not almost contain coarse particles or aggregated particles, have a sharpe grain size distribution, excellently disperse in the resins, suppress a rise in the viscosity when highly filled, and impart sufficiently large strength to the resin compound.

    摘要翻译： 通过使用多管结构的燃烧器通过燃烧产生细干二氧化硅颗粒，在分子中供给不含卤素的硅氧烷化合物的气体的混合气体和0.3〜1.5的比例的氧气 进入燃烧器的中心管，并将可燃气体供给到燃烧器中心管外侧的第一环形管中。 细干二氧化硅颗粒的BET比表面积为20〜55m 2 / g，其中含有浓度为1.5重量％的二氧化硅微粒的水悬浮液具有对于波长为 700nm，满足下式（1）：ĉ| 240 ¢S - 1.4 - 0.07其中S是细干二氧化硅颗粒的BET比表面积（m 2 / g）。 细干燥二氧化硅粒子几乎不含有粗粒子或凝集粒子，具有尖锐的粒度分布，在树脂中分散良好，抑制高填充时的粘度上升，赋予树脂足够大的强度。