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41 条记录 (耗时 0.028 秒)

    Low water uptake silicas
    32.
    发明授权
    Low water uptake silicas 有权
    低吸水二氧化硅

    公开(公告)号：US07524478B2

    公开(公告)日：2009-04-28

    申请号：US10500107

    申请日：2002-12-24

    申请人： Remi Valero ,  Yvonick Chevallier

    发明人： Remi Valero ,  Yvonick Chevallier

    IPC分类号： C01B33/12 ,  C01B33/18 ,  C01B33/187 ,  C01B33/193

    CPC分类号： C01B33/193 ,  C01P2006/12 ,  C01P2006/80 ,  C01P2006/82 ,  C08K3/36 ,  C08L83/04

    摘要： The invention concerns a method for preparing low water uptake precipitated silicas, comprising successive steps which consist in: (a) producing an initial starter including a silicate, the silicate concentration in said starter, expressed in SiO2 equivalent, being less than 15 g/L; (b) bringing the medium pH to a value ranging between 7 and 8 by adding an acidifying agent, (c) in the resulting medium, simultaneously adding a silicate and an acidifying agent the respective amounts of silicate and acidifying agent added in time being specifically such that, during the entire addition (1) the reaction medium pH stays between 7 and 8, and (ii) the silicon concentration in the medium, expressed in SiO2 equivalent, stays below 35 g/L; (d) adding an acidifying agent in the medium resulting from step (c), so as to bring the medium to a pH ranging between 3 and 6.5; and (e) filtering the resulting aqueous silica dispersion, then drying the filter cake obtained at the end of the filtering step. The invention also concerns low water uptake silicas obtained by said method and their use, in particular for reinforcing silicones or polymer or elastomer matrices.

    摘要翻译： 本发明涉及一种制备低吸水沉淀二氧化硅的方法，包括连续步骤，其包括：（a）产生包含硅酸盐的初始起始物，所述起始物中的硅酸盐浓度以SiO 2当量表示，小于15g / L ; （b）通过添加酸化剂使介质pH值达到7〜8，（c）在得到的培养基中，同时加入硅酸盐和酸化剂，分别加入相应量的硅酸盐和酸化剂 使得在整个添加（1）期间，反应介质pH保持在7和8之间，和（ii）以SiO 2当量表示的介质中的硅浓度保持在35g / L以下; （d）在由步骤（c）得到的培养基中加入酸化剂，以使培养基达到3至6.5的pH; 和（e）过滤所得的二氧化硅水溶液，然后干燥在过滤步骤结束时获得的滤饼。 本发明还涉及通过所述方法获得的低吸水二氧化硅及其用途，特别是用于增强硅氧烷或聚合物或弹性体基质。

    Process for preparation of abrasive precipitated silica
    33.
    发明授权
    Process for preparation of abrasive precipitated silica 有权
    研磨沉淀二氧化硅的制备方法

    公开(公告)号：US06521214B1

    公开(公告)日：2003-02-18

    申请号：US09659745

    申请日：2000-09-11

    申请人： Frèdèric Amiche ,  Adrien Dromard ,  Yvonick Chevallier

    发明人： Frèdèric Amiche ,  Adrien Dromard ,  Yvonick Chevallier

    IPC分类号： A61K710

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

    摘要： A process for the preparation of precipitated silica is disclosed. The precipitated silica has a refractive index from about 1.440 to about 1.450, among other properties. The silica is prepared by a method including; a first step of using an initial feedstock of water, an electrolytic salt and a fraction of the total amount of silicate employed; a second step including preneutralizing the feedstock with the acidifying agent until about 50 to 85% of the amount of M2O present has been neutralized; a third step including introducing into the preneutralized feedstock the remaining fraction of alkali metal silicate in aqueous solution and the acidifying agent, under conditions such that the pH of the reaction medium remains substantially constant and from about 8.6 to about 9.6; a fourth step including, after the addition of silicate is stopped, in continuing the addition of acidifying agent until the medium reaches a pH of about 7 to 8; a fifth step including, after maturation, in continuing the acidification of the reaction medium until a silica broth with a pH of about 3.7 to 4.6 is obtained; wherein the consolidation ratio CR CR = Total ⁢   ⁢ amount ⁢   ⁢ of ⁢   ⁢ silicate ⁢   ⁢ employed , expressed ⁢   ⁢ as ⁢   ⁢ SiO 2 Total ⁢   ⁢ amount ⁢   ⁢ of ⁢   ⁢ silicate ⁢   ⁢ in ⁢   ⁢ the ⁢   ⁢ feedstock , expressed ⁢   ⁢ as ⁢   ⁢ SiO 2 of the process is less than or equal to 7, and the separated and dried silica is ground, if necessary, until an average particle diameter d50 from about 6 to about 13 &mgr;m is obtained.

    摘要翻译： 公开了一种沉淀二氧化硅的制备方法。 沉淀二氧化硅具有约1.440至约1.450的折射率等性质。 二氧化硅通过以下方法制备： 使用水的初始原料，电解质盐和所用硅酸盐总量的一部分的第一步骤; 第二步，包括用酸化剂预中和原料，直到约50至85％的M 2 O存在量已被中和; 第三步骤，包括在使得反应介质的pH保持基本上恒定且约8.6至约9.6的条件下将预先中和的原料引入水溶液中的剩余部分的碱金属硅酸盐和酸化剂; 第四步骤，在停止添加硅酸盐之后，继续添加酸化剂直至培养基达到约7至8的pH; 第五步骤，在成熟后，继续反应介质的酸化，直到获得pH为3.7〜4.6的二氧化硅肉汤; 其中该方法的固结比例CR小于或等于7，如果需要，将分离和干燥的二氧化硅研磨，直到获得约6至约13μm的平均粒径d 50。

    Process for the preparation of precipitated silica, new precipitated silicas containing zinc and their use for the reinforcement of elastomers
    36.
    发明授权
    Process for the preparation of precipitated silica, new precipitated silicas containing zinc and their use for the reinforcement of elastomers 失效
    沉淀二氧化硅的制备方法，含锌的新型沉淀二氧化硅及其用于增强弹性体的用途

    公开(公告)号：US6143066A

    公开(公告)日：2000-11-07

    申请号：US150645

    申请日：1998-09-02

    申请人： Yves Bomal ,  Yvonick Chevallier ,  Evelyne Prat

    发明人： Yves Bomal ,  Yvonick Chevallier ,  Evelyne Prat

    IPC分类号： C01B33/193 ,  C08K3/36 ,  C08K9/00 ,  C08L21/00 ,  C09C1/30 ,  C01B33/12

    CPC分类号： C09C1/3045 ,  C01B33/193 ,  C08K3/36 ,  C09C1/30 ,  C01P2002/54 ,  C01P2004/12 ,  C01P2004/20 ,  C01P2004/32 ,  C01P2004/39 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/17 ,  C01P2006/19 ,  C01P2006/80 ,  C01P2006/90

    摘要： The invention relates to a new process for the preparation of precipitated silica which has a good dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantially spherical beads or of granules, these silicas being characterized by the fact that they have a CTAB specific surface of between 90 and 250 m.sup.2 /g, a DOP oil uptake lower than 300 ml/100 g, a pore distribution such that the pore volume consisting of the pores whose diameter is between 175 and 275 .ANG. represents less than 50% of the pore volume consisting of the pores of diameters smaller than or equal to 400 .ANG., a zinc content of between 1 and 5% by weight and by the fact that the number N of molecules of stearic acid consumed per nm.sup.2 of silica surface, when stearic acid is reacted with the said silica in xylene for 2 hours at 120.degree. C., is at least 1. The invention also relates to the use of the said silicas as reinforcing fillers for elastomers especially for improving their rheological properties.

    摘要翻译： 本发明涉及一种制备沉淀二氧化硅的新方法，其具有良好的分散性和非常令人满意的增强性能。 它还涉及新的沉淀二氧化硅，其为粉末形式，基本上为球形的珠粒或颗粒，这些二氧化硅的特征在于它们的CTAB比表面积为90至250m 2 / g，DOP油吸收 小于300ml / 100g，孔分布使得由直径在175和275之间的孔组成的孔体积小于由直径小于或等于400的孔组成的孔体积的50％ ，锌含量为1至5重量％，并且当硬脂酸与所述二氧化硅在二甲苯中在120℃下反应2小时时，二氧化硅表面的nm2消耗的硬脂酸分子数N为N 本发明还涉及所述二氧化硅作为弹性体的增强填料的用途，特别是为了改善它们的流变性能。

    Precipitated silicas
    37.
    发明授权
    Precipitated silicas 失效
    沉淀二氧化硅

    公开(公告)号：US5882617A

    公开(公告)日：1999-03-16

    申请号：US886146

    申请日：1997-06-30

    申请人： Yvonick Chevallier ,  Evelyne Prat

    发明人： Yvonick Chevallier ,  Evelyne Prat

    IPC分类号： C01B33/193 ,  C08K3/00 ,  C08K3/34 ,  C08K3/36 ,  C08K9/04 ,  C08L9/00 ,  C08L101/00 ,  C01B33/12

    CPC分类号： C01B33/193 ,  C08K3/36 ,  C08K9/04 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/17 ,  C01P2006/19

    摘要： Novel silicas in the form of powder and spherical beads or granules. The silicas are characterized by having a specific CTAB surface of 100-140 m.sup.2 /g, a small median diameter, following disaggregation by ultrasound means, and optionally, a porous distribution so that the porous volume occupied by the pores whose diameter is 175-275 .ANG. is less than 55% of the porous volume occupied by the pores having diameters of 400 .ANG. or less. The invention also concerns a method for the preparation of said silicas and their use as reinforcing fillers for elastomers.

    摘要翻译： 以粉末和球形珠粒或颗粒形式的新型二氧化硅。 二氧化硅的特征在于具有100-140m 2 / g的特定CTAB表面，在通过超声波装置解聚之后具有小的中值直径，并且任选地具有多孔分布，使得由直径为175-275的孔占据的多孔体积 ANGSTROM小于孔直径为400 ANGSTROM或更小的孔隙所占的多孔体积的55％。 本发明还涉及制备所述二氧化硅的方法及其作为弹性体增强填料的用途。

    Process for the preparation of precipitated silica, new percipitated silicas containing aluminum and their use for the reinforcement of elastomers
    38.
    发明授权
    Process for the preparation of precipitated silica, new percipitated silicas containing aluminum and their use for the reinforcement of elastomers 失效
    沉淀二氧化硅的制备方法，含有铝的新型渗透二氧化硅及其用于增强弹性体的用途

    公开(公告)号：US5876494A

    公开(公告)日：1999-03-02

    申请号：US750127

    申请日：1997-03-30

    申请人： Yves Bomal ,  Yvonick Chevallier ,  Philippe Cochet

    发明人： Yves Bomal ,  Yvonick Chevallier ,  Philippe Cochet

    IPC分类号： C01B33/193 ,  C08K3/36 ,  C08K9/00 ,  C08L21/00 ,  C09C1/30 ,  C09C1/28 ,  C01B33/12

    CPC分类号： C09C1/30 ,  C01B33/193 ,  C08K3/36 ,  C01P2002/54 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/17 ,  C01P2006/19 ,  C01P2006/80

    摘要： The invention relates to a new process for the preparation of precipitated silica which has a very good dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantially spherical beads or of granules, these silicas being characterized by the fact that they have a CTAB specific surface of between 100 and 240 m.sup.2 /g, a DOP oil uptake lower than 300 ml/100 g, a pore distribution such that the pore volume consisting of the pores whose diameter is between 175 and 275 .ANG. represents less than 50% of the pore volume consisting of the pores of diameters which are smaller than or equal to 400 .ANG., a median diameter, after disintegration with ultrasound, smaller than 5 .mu.m and an aluminium content of at least 0.35% by weight. The invention also relates to the use of the said silicas as reinforcing fillers for elastomers.

    摘要翻译： PCT No.PCT / FR96 / 00463 Sec。 371日期1997年3月30日 102（e）1997年3月30日PCT 1996年3月28日PCT公布。 公开号WO96 / 30303 PCT 日期1996年10月3日本发明涉及一种制备沉淀二氧化硅的新方法，其具有非常好的分散性和非常令人满意的增强性能。 它还涉及新的沉淀二氧化硅，其为粉末形式，基本上为球形的珠粒或颗粒，这些二氧化硅的特征在于它们的CTAB比表面积为100-240m 2 / g，DOP油吸收 低于300ml / 100g的孔分布，使得由直径在175和275之间的孔组成的孔体积小于由直径小于或等于的孔的孔体积的50％ 400 ANGSTROM，中值直径，超声波分解后，小于5微米，铝含量至少为0.35重量％。 本发明还涉及所述二氧化硅作为弹性体的增强填料的用途。

    Process for the production of a silica colloid
    39.
    发明授权
    Process for the production of a silica colloid 失效
    生产二氧化硅胶体的方法

    公开(公告)号：US5236623A

    公开(公告)日：1993-08-17

    申请号：US626243

    申请日：1990-12-12

    申请人： Yvonick Chevallier

    发明人： Yvonick Chevallier

    IPC分类号： C01B33/143 ,  C01B33/193

    CPC分类号： B82Y30/00 ,  C01B33/143 ,  C01B33/193 ,  C01P2004/32 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12

    摘要： Silica colloids having a spherical form, a mean diameter of between about 10 and 100 nm and a polydispersity index between about 1 and 4. A process for making silica colloids is also provided comprising a) forming a reaction medium by simultaneously adding an acidifying agent and an alkaline silicate solution to a reaction vessel, b) reacting the acidifying agent and alkaline silicate solution, and c) maintaining a constant volume of the reaction medium by drawing off the reaction medium.

    摘要翻译： 具有球形的平均粒径为约10nm至100nm，多分散指数为约1至4的二氧化硅胶体。还提供了制备二氧化硅胶体的方法，包括：a）通过同时加入酸化剂和 将碱性硅酸盐溶液加入到反应容器中，b）使酸化剂和碱性硅酸盐溶液反应，和c）通过抽出反应介质来维持反应介质的恒定体积。

    Production of silica colloids
    40.
    发明授权
    Production of silica colloids 失效
    生产二氧化硅胶体

    公开(公告)号：US5066420A

    公开(公告)日：1991-11-19

    申请号：US82988

    申请日：1987-08-05

    申请人： Yvonick Chevallier

    发明人： Yvonick Chevallier

    IPC分类号： C01B33/143 ,  C01B33/193

    CPC分类号： B82Y30/00 ,  C01B33/143 ,  C01B33/193 ,  C01P2004/32 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12

    摘要： Silica colloids having a spherical form, a mean diameter of between about 10 and 100 nm and a polydispersity index between about 1 and 4. A process for making silica colloids is also provided comprising a) forming a reaction medium by simultaneously adding an acidifying agent and an alkaline silicate solution to a reaction vessel, b) reacting the acidifying agent and alkaline silicate solution, and c) maintaining a constant volume of the reaction medium by drawing off the reaction medium.

    摘要翻译： 具有球形的平均粒径为约10nm至100nm，多分散指数为约1至4的二氧化硅胶体。还提供了制备二氧化硅胶体的方法，包括：a）通过同时加入酸化剂和 将碱性硅酸盐溶液加入到反应容器中，b）使酸化剂和碱性硅酸盐溶液反应，和c）通过抽出反应介质来维持反应介质的恒定体积。