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    Wet-grinding gypsum with polycarboxylates
    1.
    发明授权
    Wet-grinding gypsum with polycarboxylates 有权
    用多羧酸盐湿法研磨石膏

    公开(公告)号：US07861955B2

    公开(公告)日：2011-01-04

    申请号：US11985515

    申请日：2007-11-15

    申请人： Sharon Louise Tracy ,  David B. McDonald ,  Qingxia Liu

    发明人： Sharon Louise Tracy ,  David B. McDonald ,  Qingxia Liu

    IPC分类号： B02C19/00

    CPC分类号： B02C23/06 ,  B02C19/0056 ,  C01P2004/61 ,  C01P2006/22 ,  C04B11/00 ,  C04B2103/52 ,  C09C1/025 ,  Y02P40/20 ,  C04B24/2641

    摘要： The process of the present invention includes obtaining a feed material having an initial median particle size. A solution of a polycarboxylate dispersant in water is formed, then the feed material is added to the solution to form a slurry. The slurry is wet-ground to reduce the median particle size of the feed material. Optionally, the total amount of polycarboxylate dispersant is divided into a plurality of doses that are added periodically over the total grinding time.

    摘要翻译： 本发明的方法包括获得具有初始中值粒度的进料。 形成聚羧酸酯分散剂在水中的溶液，然后将原料加入到溶液中形成浆料。 将浆料湿磨以减少进料的中值粒度。 任选地，多羧酸盐分散剂的总量被分成在总研磨时间内周期性加入的多个剂量。

    Process for manufacturing ultra low consistency alpha- and beta- blend stucco
    5.
    发明授权
    Process for manufacturing ultra low consistency alpha- and beta- blend stucco 有权
    制造超低浓度α-和β-混合灰泥的方法

    公开(公告)号：US07588634B2

    公开(公告)日：2009-09-15

    申请号：US11533604

    申请日：2006-09-20

    申请人： Michael R. Lynn ,  W. David Song ,  Qingxia Liu ,  Qiang Yu ,  Michael L. Cloud

    发明人： Michael R. Lynn ,  W. David Song ,  Qingxia Liu ,  Qiang Yu ,  Michael L. Cloud

    IPC分类号： C04B11/00

    CPC分类号： C01F11/466 ,  C04B11/002 ,  C04B11/024 ,  C04B11/032

    摘要： A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to produce beta calcium sulfate hemihydrate. The process starts with 50-75% gypsum-containing solids slurry, and then steam calcines the slurry in a first reactor to form partially calcined gypsum slurry which contains calcium sulfate dihydrate and alpha calcium sulfate hemihydrate. The partially calcined slurry is then dewatered. Then the filter cake is fed into a kettle to complete the calcination process by converting the calcium sulfate dihydrate of the filter cake material into beta calcium sulfate hemihydrate.

    摘要翻译： 公开了一种制备包括浆料煅烧步骤的α-和β-灰泥混合物以产生α硫酸钙半水合物，然后进行流化床煅烧步骤以产生β硫酸钙半水合物的方法。 该方法从50-75％含石膏固体浆料开始，然后蒸汽在第一反应器中煅烧浆料以形成含有硫酸钙二水合物和α硫酸钙半水合物的部分煅烧石膏浆料。 然后将部分煅烧的浆料脱水。 然后通过将滤饼材料的硫酸钙二水合物转化成β硫酸钙半水合物将滤饼进料到釜中以完成煅烧过程。

    Surface enhancing coating for gypsum-containing floor underlayments
    7.
    发明授权
    Surface enhancing coating for gypsum-containing floor underlayments 有权
    含石膏地板底层的表面增强涂层

    公开(公告)号：US07276549B2

    公开(公告)日：2007-10-02

    申请号：US10755786

    申请日：2004-01-12

    申请人： Qingxia Liu ,  John W. Ellicson ,  David McDonald

    发明人： Qingxia Liu ,  John W. Ellicson ,  David McDonald

    IPC分类号： C08K3/30 ,  C04B28/36

    CPC分类号： C09D201/00 ,  C04B28/14 ,  C04B2111/60 ,  E04F15/18 ,  Y10T428/25 ,  Y10T428/28 ,  Y10T428/2891 ,  Y10T428/31855 ,  C04B41/48

    摘要： A coating for preparing a floor underlayment to receive an adhesive includes a water-soluble, latex polymer, a defoamer and a dual-function surface enhancing agent. The surface enhancing agent includes a set accelerator that also functions to cross link the adhesive, hardening the surface of the underlayment using at least two mechanisms. One embodiment of the invention is a dry mixture that forms a coating when added to water. The dry mixture includes from about 10% to about 50% of the redispersible polymer by weight based on the mixture, from about 50% to about 90% of the surface enhancing agent and from about 0.15% to about 0.25% of the defoamer by weight based on the mixture. Other embodiments describe a liquid coating formed by adding from about 1 to about 8 pails water to 1 part of the dry mixture on a volumc basisby volume based on the mixture.

    摘要翻译： 用于制备底层底层以接收粘合剂的涂层包括水溶性胶乳聚合物，消泡剂和双功能表面增强剂。 表面增强剂包括一种既可以使粘合剂交联的功能的固化加速剂，也可以使用至少两种机制来硬化底层的表面。 本发明的一个实施方案是当添加到水中时形成涂层的干燥混合物。 干燥混合物包含基于混合物重量的约10％至约50％的可再分散聚合物，按重量计约50％至约90％的表面增强剂和约0.15％至约0.25％的消泡剂 基于混合物。 其它实施方案描述了通过基于混合物以体积计体积从约1至约8个桶中加入1份干燥混合物而形成的液体涂料。