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    • 1. 发明授权
    • Pyrogenically produced silicon dioxide powder and silicone sealing compound containing this powder
    • 热解产生的二氧化硅粉末和含有这种粉末的硅氧烷密封化合物
    • US07439298B2
    • 2008-10-21
    • US11084022
    • 2005-03-21
    • Kai SchumacherDieter KernerUwe DienerMario Scholz
    • Kai SchumacherDieter KernerUwe DienerMario Scholz
    • C08K3/34
    • C08K3/36C01B33/183C09K3/1018C08L83/04C08L21/00
    • Pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles having a BET surface area of 150±15 m2/g, wherein the aggregates display an average surface area of 12000 to 20000 nm2, an average equivalent circle diameter (ECD) of 90 to 120 nm and an average circumference of 1150 to 1700 nm. It is produced by a pyrogenic process in which silicon tetrachloride and a second silicon component comprising H3SiCl, H2SiCl2, HSiCl3, CH3SiCl3, (CH3)2SiCl2, (CH3)3SiCl and/or (n-C3H7)SiCl3 are mixed with primary air and a combustion gas and burnt into a reaction chamber, secondary air also being introduced into the reaction chamber, and the feed materials being chosen such that an adiabatic flame temperature of 1670 to 1730° C. is obtained. Silicone sealing compound containing the pyrogenically produced silicon dioxide powder.
    • 以BET表面积为150±15m 2 / g的一次粒子的聚集体形式的热解生成的二氧化硅粉末,其中聚集体的平均表面积为12000〜20000nm, 2,平均当量圆直径(ECD)为90〜120nm,平均圆周为1150〜1700nm。 它是通过热原法制造的,其中四氯化硅和包含H 3 SiCl,H 2 SiCl 2,HSiCl 3>与一次空气和燃烧气体混合并燃烧到反应室中,二次空气也被引入反应室,并且进料选择为使得绝热火焰温度为1670至1730℃ C.得到。 含有热解法生产的二氧化硅粉末的硅酮密封剂。