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    Process for producing acidic aqueous alumina sol
    2.
    发明授权
    Process for producing acidic aqueous alumina sol 失效
    生产酸性水性氧化铝溶胶的方法

    公开(公告)号：US07569614B2

    公开(公告)日：2009-08-04

    申请号：US10546912

    申请日：2004-03-11

    申请人： Kiyomi Ema ,  Takaichi Sugiyama

    发明人： Kiyomi Ema ,  Takaichi Sugiyama

    IPC分类号： C09K3/00 ,  B01F3/00

    CPC分类号： B82Y30/00 ,  B01J13/0008 ,  C01F7/142 ,  C01P2002/60 ,  C01P2004/24 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  Y02P20/142 ,  Y10S516/922 ,  Y10S516/928

    摘要： A process for producing a stable acidic aqueous alumina sol containing columnar secondary particles having a length of 50 to 400 nm which are formed by face-to-face coagulation of rectangular plate-like primary particles having a length of one side of 10 to 40 nm and a thickness of 2.5 to 10 nm when observed through an electron microscope, by use of an aqueous alkali aluminate solution and liquid or gaseous carbon dioxide as starting materials. The obtained acidic aqueous alumina sol has a low viscosity and is stable for salts. The dried gel obtained from the sol is characterized in that the gel structure thereof is rigid even though it is porous.

    摘要翻译： 一种生产稳定的酸性含水氧化铝溶胶的方法，该溶胶含有长度为50〜400nm的柱状二次粒子，该长度为一边长10〜40nm的矩形板状一次粒子的面对面凝固 并且通过电子显微镜观察时，通过使用碱金属铝酸盐溶液和液体或气态二氧化碳作为起始材料，其厚度为2.5至10nm。 得到的酸性水溶性氧化铝溶胶的粘度低，对于盐是稳定的。 由溶胶获得的干燥凝胶的特征在于，即使是多孔的，其凝胶结构也是刚性的。

    Process for preparing an aqueous solution of sulfanilic acid modified melamine-formaldehyde resin and a cement composition
    4.
    发明授权
    Process for preparing an aqueous solution of sulfanilic acid modified melamine-formaldehyde resin and a cement composition 有权
    制备磺胺酸改性三聚氰胺 - 甲醛树脂水溶液和水泥组合物的方法

    公开(公告)号：US06214965B1

    公开(公告)日：2001-04-10

    申请号：US09420235

    申请日：1999-10-19

    申请人： Jun Uchida ,  Takaichi Sugiyama ,  Yuhji Sudoh ,  Keisuke Nakayama

    发明人： Jun Uchida ,  Takaichi Sugiyama ,  Yuhji Sudoh ,  Keisuke Nakayama

    IPC分类号： C08G1240

    CPC分类号： C04B24/223 ,  C04B28/02 ,  C08G12/32 ,  C08G12/34 ,  C04B2103/22 ,  C04B20/023 ,  C04B22/126 ,  C04B24/04 ,  C04B24/06 ,  C04B24/10 ,  C04B24/18 ,  C04B24/383

    摘要： The present invention relates to a process for preparing an aqueous solution of sulfonated melamine-formaldehyde resin, and a cement composition in which the solution and a setting retarder are added to a concrete, a mortar, a cement paste or the like. And the process comprises the following step (A), step (B) and step (C): Step (A): a step of adjusting an aqueous solution containing melamine (a), formaldehyde (b), sulfanilic acid (c) and an alkali substance (d) to (a):(b):(c)=1:2.5-3.5:0.5-1.5 in molar ratio and its pH to 8.0-13.5, and thereafter heating the aqueous solution at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 40-90 mol % of the amount of sulfanilic acid charged; Step (B): a step of adding an inorganic acid to the reaction liquid obtained in the step (A) to adjust its pH to 6.0-8.0, and thereafter heating the reaction liquid at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 0-60 mol % of the amount of sulfanilic acid charged; Step (C): a step of adjusting a pH of the reaction liquid obtained in step (B) to 7.0-13.5.

    摘要翻译： 本发明涉及一种制备磺化三聚氰胺 - 甲醛树脂的水溶液的方法，以及其中将溶液和凝固缓凝剂加入到混凝土，砂浆，水泥浆等中的水泥组合物。 该方法包括以下步骤（A），步骤（B）和步骤（C）：步骤（A）：调节含有三聚氰胺（a），甲醛（b），对氨基苯磺酸（c）和 碱性物质（d）〜（a）：（b）：（c）= 1:2.5〜3.5:5.5〜1.5摩尔比，pH为8.0〜13.5，然后将水溶液加热至50〜90℃ C.进行反应，直到游离的氨磺酸降低至加入的对氨基苯酸的40-90mol％;步骤（B）：将无机酸加入到步骤（A）中获得的反应液中以调节 pH至6.0-8.0，然后在50-90℃加热反应液进行反应，直至游离的氨磺酸降至加入的氨磺酸的0-60摩尔％为止;步骤（C）：步骤 将步骤（B）中获得的反应液的pH调节为7.0-13.5。

    Process for preparing an aqueous solution of sulfanilic acid modified melamine-formaldehyde resin and a cement composition
    5.
    发明授权
    Process for preparing an aqueous solution of sulfanilic acid modified melamine-formaldehyde resin and a cement composition 有权
    制备磺胺酸改性三聚氰胺 - 甲醛树脂水溶液和水泥组合物的方法

    公开(公告)号：US06458870B1

    公开(公告)日：2002-10-01

    申请号：US09690593

    申请日：2000-10-18

    申请人： Jun Uchida ,  Takaichi Sugiyama ,  Yuhji Sudoh ,  Keisuke Nakayama

    发明人： Jun Uchida ,  Takaichi Sugiyama ,  Yuhji Sudoh ,  Keisuke Nakayama

    IPC分类号： C08K300

    CPC分类号： C04B24/223 ,  C04B28/02 ,  C08G12/32 ,  C08G12/34 ,  C04B2103/22 ,  C04B20/023 ,  C04B22/126 ,  C04B24/04 ,  C04B24/06 ,  C04B24/10 ,  C04B24/18 ,  C04B24/383

    摘要： The present invention relates to a process for preparing an aqueous solution of sulfonated melamine-formaldehyde resin, and a cement composition in which the solution and a setting retarder are added to a concrete, a mortar, a cement paste or the like. And the process comprises the following step (A), step (B) and step (C): Step (A): a step of adjusting an aqueous solution containing melamine (a), formaldehyde (b), sulfanilic acid (c) and an alkali substance (d) to (a):(b):(c)=1:2.5-3.5:0.5-1.5 in molar ratio and its pH to 8.0-13.5, and thereafter heating the aqueous solution at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 40-90 mol % of the amount of sulfanilic acid charged; Step (B): a step of adding an inorganic acid to the reaction liquid obtained in the step (A) to adjust its pH to 6.0-8.0, and thereafter heating the reaction liquid at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 20-60 mol % of the amount of sulfanilic acid charged; Step (C): a step of adjusting a pH of the reaction liquid obtained in step (B) to 7.0-13.5.

    摘要翻译： 本发明涉及一种制备磺化三聚氰胺 - 甲醛树脂的水溶液的方法，以及其中将溶液和凝固缓凝剂加入到混凝土，砂浆，水泥浆等中的水泥组合物。 该方法包括以下步骤（A），步骤（B）和步骤（C）：步骤（A）：调节含有三聚氰胺（a），甲醛（b），对氨基苯磺酸（c）和 碱性物质（d）〜（a）：（b）：（c）= 1:2.5〜3.5:5.5〜1.5摩尔比，pH为8.0〜13.5，然后将水溶液加热至50〜90℃ C.进行反应，直到游离的氨磺酸降低至加入的对氨基苯酸的40-90mol％;步骤（B）：将无机酸加入到步骤（A）中获得的反应液中以调节 pH至6.0-8.0，然后在50-90℃加热反应液进行反应，直至游离的氨磺酸降至加入的氨磺酸的20-60摩尔％为止;步骤（C）：步骤 将步骤（B）中获得的反应液的pH调节为7.0-13.5。