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    Pyrogenically produced silicon dioxide powder
    1.
    发明专利
    Pyrogenically produced silicon dioxide powder 有权
    生产二氧化硅粉末

    公开(公告)号：JP2006193405A

    公开(公告)日：2006-07-27

    申请号：JP2005106834

    申请日：2005-04-01

    Applicant: Degussa Ag ,  デグサ アクチエンゲゼルシャフトDegussa AG

    Inventor： SCHUMACHER KAI ,  KERNER DIETER DR ,  SCHILLING ROLAND ,  FLESCH JUERGEN ,  SCHIENER THOMAS

    IPC: C01B33/18 ,  C08K3/36 ,  C08L67/00 ,  C08L83/04

    CPC classification number: C01B33/18 ,  C01B33/183 ,  C01P2004/64 ,  C01P2006/12 ,  C09C1/30

    Abstract: PROBLEM TO BE SOLVED: To provide a silicon dioxide powder displaying a good thickening action combined with a short incorporation time into polymers, particularly polyester resins. SOLUTION: The silicon dioxide powder is pyrogenically produced in the form of aggregates of primary particles having a BET surface area of 200±25 m 2 /g, wherein the aggregates display an average surface area of 7,000 to 12,000 nm 2 , an average equivalent circle diameter (ECD) of 80 to 100 nm and an average circumference of 850 to 1,050 nm. COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题：提供一种二氧化硅粉末，其显示出良好的增稠作用，并将结合时间短于聚合物，特别是聚酯树脂。 解决方案：二氧化硅粉末以BET表面积为200±25m 2 / SP / g / g的一次粒子的聚集体的形式热解生产，其中聚集体显示平均表面积 7,000至12,000nm 2 ，平均当量圆直径（ECD）为80至100nm，平均周长为850至1050nm。 版权所有（C）2006，JPO＆NCIPI

    6.
    发明专利
    未知

    公开(公告)号：AT480499T

    公开(公告)日：2010-09-15

    申请号：AT05005928

    申请日：2005-03-18

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： SCHUMACHER KAI ,  KERNER DIETER ,  SCHILLING ROLAND ,  FLESCH JUERGEN ,  SCHIENER THOMAS

    IPC: C01B33/18 ,  C08K3/36 ,  C09C1/30

    Abstract: A silicon dioxide powder composition comprises a pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles. It has a Brunauer-Emmett-Teller (BET) surface area of 200 +-25 m 2>/g. The aggregates display an average surface area of 7000-12000 nm 2>, an average equivalent circle diameter (ECD) of 80-100 nm and an average circumference of 850-1050 nm. Independent claims are also included for: (A) a process of producing the above pyrogenically produced silicon dioxide powder, comprising evaporating, separately or together, a mixture of silicon compounds; transferring vapors by using a carrier gas to a mixing chamber, with silicon tetrachloride (SiCl 4) as a first component in a proportion of 60-95 wt.% relative to the mixture and a second component from H 3SiCl, dichlorosilane (H 2SiCl 2), trichlorosilane (HSiCl 3), methyl trichlorosilane (CH 3SiCl 3), (CH 3) 2SiCl 2, (CH 3) 3SiCl, or (n-C 3H 7)SiCl 3 (all sic), in a proportion of 5-40 wt.%, relative to the mixture; separately transferring a combustion gas and primary air, which can optionally be enriched with oxygen and/or be pre-heated, to the mixing chamber; igniting the mixture of the vapor of silicon chlorides, combustion gas and primary air in a burner and burning the flame into a reaction chamber; introducing secondary air, which surrounds the flame, into the reaction chamber, where the ratio of secondary air to primary air is 0.05-3, preferably 0.15-2; then, separating the solid from gaseous substances; and then steam-treating the solid at 250-750[deg]C. The total amount of oxygen is at least adequate for the complete combustion of the combustion gas and the silicon compounds. The amount of feed materials comprising the silicon compounds, the combustion gas, the primary air and the secondary air is chosen such that an adiabatic flame temperature (Tad) of 1570-1630[deg]C is obtained, where Tad is the temperature of the feed materials plus the sum of the reaction enthalpies of the partial reactions/heat capacity of the substances leaving the reaction chamber, comprising silicon dioxide, water, hydrogen chloride, carbon dioxide, oxygen, nitrogen, and optionally the carrier gas if it is not air or nitrogen, taking the specific heat capacity of these substances at 1000[deg]C as a basis; (B) a polyester comprising the above composition; and (C) a silicon rubber comprising the above composition.

    8.
    发明专利
    未知

    公开(公告)号：DE102005001408A1

    公开(公告)日：2006-07-20

    申请号：DE102005001408

    申请日：2005-01-12

    Applicant: DEGUSSA

    Inventor： SCHUMACHER KAI ,  KERNER DIETER ,  SCHILLING ROLAND ,  FLESCH JUERGEN ,  SCHIENER THOMAS

    IPC: C01B33/18 ,  C08K7/26 ,  C08L67/00 ,  C08L83/04

    Abstract: A silicon dioxide powder composition comprises a pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles. It has a Brunauer-Emmett-Teller (BET) surface area of 200 +-25 m 2>/g. The aggregates display an average surface area of 7000-12000 nm 2>, an average equivalent circle diameter (ECD) of 80-100 nm and an average circumference of 850-1050 nm. Independent claims are also included for: (A) a process of producing the above pyrogenically produced silicon dioxide powder, comprising evaporating, separately or together, a mixture of silicon compounds; transferring vapors by using a carrier gas to a mixing chamber, with silicon tetrachloride (SiCl 4) as a first component in a proportion of 60-95 wt.% relative to the mixture and a second component from H 3SiCl, dichlorosilane (H 2SiCl 2), trichlorosilane (HSiCl 3), methyl trichlorosilane (CH 3SiCl 3), (CH 3) 2SiCl 2, (CH 3) 3SiCl, or (n-C 3H 7)SiCl 3 (all sic), in a proportion of 5-40 wt.%, relative to the mixture; separately transferring a combustion gas and primary air, which can optionally be enriched with oxygen and/or be pre-heated, to the mixing chamber; igniting the mixture of the vapor of silicon chlorides, combustion gas and primary air in a burner and burning the flame into a reaction chamber; introducing secondary air, which surrounds the flame, into the reaction chamber, where the ratio of secondary air to primary air is 0.05-3, preferably 0.15-2; then, separating the solid from gaseous substances; and then steam-treating the solid at 250-750[deg]C. The total amount of oxygen is at least adequate for the complete combustion of the combustion gas and the silicon compounds. The amount of feed materials comprising the silicon compounds, the combustion gas, the primary air and the secondary air is chosen such that an adiabatic flame temperature (Tad) of 1570-1630[deg]C is obtained, where Tad is the temperature of the feed materials plus the sum of the reaction enthalpies of the partial reactions/heat capacity of the substances leaving the reaction chamber, comprising silicon dioxide, water, hydrogen chloride, carbon dioxide, oxygen, nitrogen, and optionally the carrier gas if it is not air or nitrogen, taking the specific heat capacity of these substances at 1000[deg]C as a basis; (B) a polyester comprising the above composition; and (C) a silicon rubber comprising the above composition.

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