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    AEROGEL AND PRODUCTION METHOD THEREFOR
    2.
    发明申请
    AEROGEL AND PRODUCTION METHOD THEREFOR 有权

    公开(公告)号：US20220119266A1

    公开(公告)日：2022-04-21

    申请号：US17429651

    申请日：2020-01-23

    申请人： TIEM FACTORY INC.

    发明人： Mamoru AIZAWA ,  Ai UEGAKI

    IPC分类号： C01B33/143 ,  C01B33/154 ,  C01B33/158

    摘要： A production method for an aerogel includes a sol generation step by adding a silicon compound to an aqueous solution containing an acid catalyst and performing hydrolysis, where the silicon compound contains at least a quadri-functional silane compound and a tri-functional silane compound among quadri-functional silane compounds, tri-functional silane compounds, and di-functional silane compounds, the density of the aerogel is 0.15 g/cm3 or less, for example the silicon compound is a mixture of a quadri-functional silane compound, a tri-functional silane compound, and a di-functional silane compound having portions satisfying 0

    Process for preparing aerogels
    6.
    发明授权
    Process for preparing aerogels 失效
    制备气凝胶的方法

    公开(公告)号：US5759506A

    公开(公告)日：1998-06-02

    申请号：US836184

    申请日：1997-05-01

    申请人： Rolf-Michael Jansen ,  Andreas Zimmermann

    发明人： Rolf-Michael Jansen ,  Andreas Zimmermann

    IPC分类号： C01B33/154 ,  C01B33/16 ,  C04B30/00 ,  B01D3/34 ,  C01B33/12

    CPC分类号： C01B33/154 ,  C01B33/1543 ,  C01B33/16 ,  C04B30/00

    摘要： The invention relates to a process for preparing modified SiO.sub.2 gels, in which the gel is aged using a solution of a condensable alkyl and/or aryl orthosilicate, or using an aqueous silicic acid solution, in order to strengthen the structure of the gel.

    摘要翻译： PCT No.PCT / EP95 / 04141 Sec。 371日期1997年5月1日 102（e）日期1997年5月1日PCT提交1995年10月23日PCT公布。 WO96 / 14266 PCT公开号 日期1996年5月17日本发明涉及一种制备改性SiO 2凝胶的方法，其中使用可冷凝的烷基和/或原硅酸盐溶液或使用硅酸水溶液使凝胶老化，以加强 凝胶。

    Dentifrice-compatible silica particulates
    8.
    发明授权
    Dentifrice-compatible silica particulates 失效

    公开(公告)号：US5614177A

    公开(公告)日：1997-03-25

    申请号：US485513

    申请日：1995-06-07

    申请人： Jacques Persello

    发明人： Jacques Persello

    IPC分类号： A61K8/25 ,  A61Q11/00 ,  C01B33/154 ,  C01B33/193 ,  A61K7/16 ,  A61K7/18 ,  C01B33/12 ,  C01B14/04

    CPC分类号： C01B33/154 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/90

    摘要： Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment, silica particulates have a unique surface chemistry as to be at least 50% compatible with zinc values, and have a number of OH functions, expressed as OH/nm.sup.2, of at most 15 and a zero charge point (PZC) of from 3 to 6.5. In a second embodiment, particulates have a surface chemistry as to be at least 65%, and preferably at least 90% compatible with guanidine values, notably chlorhexidine, and acidity function thereof, Ho, of at least 3.3. In a third embodiment, silica particulates are compatible with organic amines, and have a pH, in aqueous suspension, which varies according to the equations pH.ltoreq.7.5-0.7 log(C) and pH.gtoreq.5.0-0.5 log(C) and which also varies as a function of the electrical conductivity thereof, according to the equations pH.ltoreq.8.5-0.4 log(D) and pH.gtoreq.7.0-0.6 log(D) wherein (C) represents the weight concentration of said silica suspension, expressed % SiO.sub.2 and (D) represents the electrical conductivity of such aqueous silica suspension expressed in microsiemens.multidot.cm.sup.-1. In a fourth embodiment, novel silica particulates are compatible with such metal cations as zinc, tin, strontium, and the like, as well as with the fluorides, and have a unique surface chemistry such that the number of OH.sup.- functions thereof, expressed in OH.sup.- /nm.sup.2, is equal to or less than 10, and also have a zero charge point (ZCP) ranging from 3 to 6.5 and a pH, in aqueous suspension, which varies as a function of the electrical conductivity thereof according to the equation pH=b-a log (D) in which a is a constant equal to or less than 0.6; b is a constant equal to or less than 8.5; and (D) represents the electrical conductivity of such aqueous silica suspension, expressed in microsiemens.multidot.cm.sup.-1.

    Procedure to prepare transparent silica gels
    9.
    发明授权
    Procedure to prepare transparent silica gels 失效
    制备透明硅胶的步骤

    公开(公告)号：US4696808A

    公开(公告)日：1987-09-29

    申请号：US933961

    申请日：1986-11-24

    申请人： Patrick G. Barber ,  Norman R. Simpson

    发明人： Patrick G. Barber ,  Norman R. Simpson

    IPC分类号： C01B33/154 ,  C30B5/00 ,  C01B33/12

    CPC分类号： C30B5/00 ,  C01B33/154 ,  C30B29/12 ,  C30B29/46

    摘要： A process for the preparation of transparent silica gels which can be used as crystal growth media is disclosed. A quantity of cation exchange resin beads is placed in a solution of a soluble potassium salt and stirred for several hours to allow the potassium ions to replace the cations on the resin beads. The supernatant liquid is then decanted through a filter, and the treated resin beads are rinsed with distilled water to remove excess salts. The treated resin beads are then transferred into a sodium silicate solution. The resulting mixture is stirred to allow the potassium ions on the treated resin beads to exchange with the sodium ions in the sodium silicate solution. The treated silicate solution is then poured through a coarse filter. A volume of boiled, cooled distilled water is added to a volume of the treated silicate solution, after which a volume of acetic acid solution is added to the mixture of distilled water and treated silicate solution. This mixture is then allowed to gel at room temperature, whereby a transparent silica gel is produced. The transparent silica gel is used as a crystal growth medium to simulate the convectionless environment of space and produce structurally perfect crystals.

    摘要翻译： 公开了可用作晶体生长介质的透明硅胶的制备方法。 将一定数量的阳离子交换树脂珠置于可溶性钾盐溶液中并搅拌数小时以使钾离子替代树脂珠上的阳离子。 然后将上清液通过过滤器倾析，用蒸馏水冲洗经处理的树脂珠以除去过量的盐。 然后将经处理的树脂珠转移到硅酸钠溶液中。 搅拌所得混合物，使处理后的树脂珠上的钾离子与硅酸钠溶液中的钠离子交换。 然后将经处理的硅酸盐溶液通过粗过滤器倒入。 将一定量的煮沸的冷却的蒸馏水加入一定体积的经处理的硅酸盐溶液中，然后将一定体积的乙酸溶液加入到蒸馏水和经处理的硅酸盐溶液的混合物中。 然后将该混合物在室温下凝胶化，由此制备透明硅胶。 透明硅胶用作晶体生长介质，以模拟空间的无对流环境，并产生结构完美的晶体。

    Process for the preparation of silica spheres
    10.
    发明授权
    Process for the preparation of silica spheres 失效
    二氧化硅球的制备方法

    公开(公告)号：US4640807A

    公开(公告)日：1987-02-03

    申请号：US758623

    申请日：1985-07-24

    申请人： Madjid Afghan ,  Josephus G. Sponselee

    发明人： Madjid Afghan ,  Josephus G. Sponselee

    IPC分类号： C01B33/16 ,  B01J21/08 ,  C01B33/154 ,  C01B33/157 ,  C01B33/12

    CPC分类号： C01B33/1546 ,  B01J21/08 ,  C01B33/154

    摘要： Silica spheres are prepared in a process comprising:(a) preparing a silica hydrosol by mixing an aqueous solution of an alkali metal silicate with an aqueous solution of an acid;(b) converting the hydrosol into droplet form;(c) aging the droplets in a fluid to produce hydrogel particles;(d) partially drying the hydrogel particles at 10.degree. to 60.degree. C. in air having a relative humidity in the range of from 45 to 95%, to a water content in the range of from 0.3 to 1.3 kg/kg solids;(e) decreasing the cation content of the hydrogel particles by ion-exchange in an aqueous medium to less than 10% w, calculated on dry material; and(f) finally drying the hydrogel particles to obtain silica spheres.

    摘要翻译： 二氧化硅球体的制备方法包括：（a）通过将碱金属硅酸盐的水溶液与酸的水溶液混合来制备二氧化硅水溶胶; （b）将水溶胶转化成液滴形式; （c）使流体中的液滴老化以产生水凝胶颗粒; （d）在相对湿度为45至95％的空气中将水凝胶颗粒部分干燥至10至60℃，水含量范围为0.3至1.3kg / kg固体; （e）通过在水性介质中的离子交换将水凝胶颗粒的阳离子含量降低至低于10％w，以干材料计算; 和（f）最后干燥水凝胶颗粒以获得二氧化硅球体。