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    Processes for preparing precipitated calcium carbonate compositions and the products thereof
    1.
    发明授权
    Processes for preparing precipitated calcium carbonate compositions and the products thereof 失效
    沉淀碳酸钙组合物的制备方法及其制备方法

    公开(公告)号：US06402824B1

    公开(公告)日：2002-06-11

    申请号：US09578470

    申请日：2000-05-26

    申请人： Gary M. Freeman ,  Randal A. Moritz ,  William J. Jones ,  Kurt H. Moller

    发明人： Gary M. Freeman ,  Randal A. Moritz ,  William J. Jones ,  Kurt H. Moller

    IPC分类号： C09C102

    CPC分类号： B01F3/20 ,  B01F3/1207 ,  B01F3/1221 ,  B01F3/2071 ,  B01F7/164 ,  C01F11/18 ,  C01F11/185 ,  C01P2004/61 ,  C01P2004/62 ,  D21H19/385

    摘要： Processes for making high quality PCC compositions, and the resulting PCC products thereof. A precipitated calcium carbonate (PCC) composition is prepared by a process comprising the step of wet media mill grinding an aqueous slurry of PCC made by carbonation of lime milk, with the grinding being done at a low solids content in a plurality of separate grinding stages, which can done while essentially free of the presence of organic dispersant. After the multi-stage wet grinding step, the ground PCC slurry is partially dewatered in the presence of an organic dispersant in a solid bowl centrifuge. Then, the partially dewatered PCC slurry is subjected, in the presence of an organic dispersant, to fluid shearing forces created in a rotor/stator type mixer. While these three steps are advantageously used together within a single PCC process flow for optimal effect, the individual steps also can be incorporated singly or in lesser combinations thereof into different PCC manufacturing schemes to beneficial effect. The resulting PCC compositions are endowed with reduced high-shear viscosity in aqueous slurry form at high solids content and contain PCC particles of narrower particle size distribution. PCC slurries are provided that are particularly well-suited for paper coatings applications including medium and low coating weight, woodfree paper coatings, although it has wider applicability and is by no means limited thereto. As another aspect, the additional cost otherwise associated with the use of evaporative-based dehydration procedures to increase the PCC solids content in a PCC slurry or associated with the adding of dry CaCO3 pigment to build slurry solids can be reduced or even eliminated by a facile made in a decanting operation within the inventive process flow.

    摘要翻译： 制备高质量PCC组合物的方法及其所得的PCC产品。 沉淀碳酸钙（PCC）组合物通过包括以下步骤的方法制备，所述方法包括湿法研磨研磨由石灰乳碳酸化制备的PCC的含水浆料的步骤，其中在多个分开的研磨阶段以低固含量进行研磨 ，其可以在基本上不含有机分散剂的情况下完成。 在多阶段湿法研磨步骤之后，将研磨的PCC浆料在有机分散剂存在下在固体碗式离心机中部分脱水。 然后，将部分脱水的PCC浆料在有机分散剂存在下进行转子/定子式混合机中产生的流体剪切力。 尽管这三个步骤有利地在单个PCC工艺流程中一起使用以获得最佳效果，但是各个步骤也可以单独地或以较小的组合并入不同的PCC制造方案中以产生有益的作用。 得到的PCC组合物以高固体含量赋予水性浆料形式的降低的高剪切粘度，并且含有较窄粒度分布的PCC颗粒。 提供了PCC浆料，其特别适用于包括中等和低涂层重量的无纸纸涂料的纸张涂料应用，尽管它具有更广泛的适用性，并不限于此。 另一方面，与使用基于蒸发的脱水方法相关联的增加PCC浆料中的PCC固体含量或与添加干燥的CaCO 3颜料相关以构建浆料固体的附加成本可以通过简便的方式减少甚至消除 在本发明工艺流程内的倾析操作中制成。

    Polymer structured clay pigment and method of preparing the same
    2.
    发明授权
    Polymer structured clay pigment and method of preparing the same 有权
    聚合物结构粘土颜料及其制备方法

    公开(公告)号：US6156117A

    公开(公告)日：2000-12-05

    申请号：US144872

    申请日：1998-09-01

    申请人： Gary M. Freeman ,  Sung-Tsuen Liu

    发明人： Gary M. Freeman ,  Sung-Tsuen Liu

    IPC分类号： C09C1/42 ,  C09C3/10 ,  D21H19/40 ,  C09C1/00 ,  C09C1/40

    CPC分类号： D21H19/40 ,  C09C1/42 ,  C09C3/10 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/22 ,  C01P2006/60 ,  C01P2006/82

    摘要： A method of preparing a polymer structured pigment slurry which comprises providing an anionic, aqueous slurry including a plurality of solid mineral particles, adding a low molecular weight, cationic polymer in an amount of less than about 0.20% by weight to the slurry and then adding a small amount of an inorganic dispersant to the polymer treated pigment slurry. The Malvern median particle size of the mineral particles treated with the polycationic polymer is less than about 20% larger than the Malvern median particle size of the untreated mineral particles.

    摘要翻译： 一种制备聚合物结构颜料浆料的方法，其包括提供包含多个固体矿物颗粒的阴离子水性浆料，向所述浆料中加入少于约0.20重量％的低分子量阳离子聚合物，然后加入 少量的无机分散剂用于聚合物处理的颜料浆料。 用聚阳离子聚合物处理的矿物颗粒的Malvern中值粒径小于未处理矿物颗粒的Malvern中值粒度的约20％。

    Low visibility landing system and method
    5.
    发明授权
    Low visibility landing system and method 有权
    低能见度着陆系统和方法

    公开(公告)号：US08374737B2

    公开(公告)日：2013-02-12

    申请号：US13243698

    申请日：2011-09-23

    申请人： Robert S. Takacs ,  Gary M. Freeman ,  Glenn L. Connor

    发明人： Robert S. Takacs ,  Gary M. Freeman ,  Glenn L. Connor

    IPC分类号： G06F19/00

    CPC分类号： G05D1/0676 ,  G08G5/0021 ,  G08G5/025

    摘要： A low visibility landing system is provided for guiding aircraft on landing approaches. The low visibility landing system may aid a pilot during landing in low visibility conditions such that an aircraft may descend to lower altitudes without visual contact with the runway than is possible with other landing systems. The system may use various navigational systems to produce a hybrid signal that may be more stable than individual signals of those navigational systems. The hybrid signal is compared to a predetermined landing approach plan to determine the deviation of the aircraft from the landing approach plan and to provide guidance to the pilot to get the aircraft back onto the landing approach plan. The system may also use multiple navigational systems to perform checks on an operation of a primary navigational system to ensure that the primary navigational system is operating accurately.

    摘要翻译： 提供低能见度的着陆系统，用于在着陆进近时引导飞机。 低能见度着陆系统可以在低能见度条件下着陆时帮助飞行员，使得飞行器可以下降到较低的高度，而不是与跑道的视觉接触，而不是与其他着陆系统相同。 该系统可以使用各种导航系统来产生可能比那些导航系统的单个信号更稳定的混合信号。 将混合信号与预定的着陆方法计划进行比较，以确定飞机与着陆进近计划的偏差，并向飞行员提供指导以使飞机返回到着陆进近计划。 该系统还可以使用多个导航系统对主导航系统的操作执行检查，以确保主导航系统准确地操作。

    Silane-treated clay production method, silane-treated clay and composition containing same
    8.
    发明授权
    Silane-treated clay production method, silane-treated clay and composition containing same 失效
    硅烷处理粘土生产方法，硅烷处理粘土和含有它们的组合物

    公开(公告)号：US6013699A

    公开(公告)日：2000-01-11

    申请号：US185641

    申请日：1998-11-04

    申请人： Gary M. Freeman ,  Carl J. Marshall, Jr. ,  Walter O. Lackey ,  Masao Onizawa

    发明人： Gary M. Freeman ,  Carl J. Marshall, Jr. ,  Walter O. Lackey ,  Masao Onizawa

    IPC分类号： B60C1/00 ,  B60C13/04 ,  C04B20/10 ,  C08K9/06 ,  C09C1/42 ,  C08K3/34

    CPC分类号： C09C1/42 ,  B60C1/00 ,  B60C1/0025 ,  B60C13/04 ,  C04B20/1051 ,  C08K9/06 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/22 ,  C01P2006/60 ,  Y10S152/12

    摘要： An effective production method for silane-treated clays having exceptional reinforcing effects with respect to rubber, and compositions using these silane-treated clays are offered. With the silane-treated clay production method, a functional silane is predispersed or emulsified in water by means of a surfactant in order to mix the functional silane with kaolin clay and thereby uniformly surface-treat the kaolin clay with the functional silane. The surfactant should preferably be a non-ionic surfactant with an HLB value in the range of 8-18. The silane-treated clay formed by surface-treating kaolin clay by means of these functional silanes characteristically contains low residual levels of the non-ionic surfactants. The functional silanes can be either vinyl or sulfur functional silanes. The silane treated clays are useful as fillers or extenders in rubber compositions, particularly those employing silicas and/or carbon blacks.

    摘要翻译： 提供了对于橡胶具有优异的增强效果的硅烷处理粘土的有效制备方法，以及使用这些硅烷处理的粘土的组合物。 通过硅烷处理的粘土生产方法，通过表面活性剂将功能性硅烷预先分散或在水中乳化，以将功能性硅烷与高岭土混合，从而用功能性硅烷均匀地表面处理高岭土。 表面活性剂应优选为HLB值在8-18范围内的非离子表面活性剂。 通过这些功能性硅烷表面处理高岭土形成的硅烷处理粘土特征在于含有低残留水平的非离子表面活性剂。 功能硅烷可以是乙烯基或硫官能硅烷。 硅烷处理的粘土可用作橡胶组合物中的填料或增量剂，特别是使用二氧化硅和/或炭黑的那些。

    Coarse particle size kaolin clay and method
    10.
    发明授权
    Coarse particle size kaolin clay and method 失效
    粗粒度高岭土和方法

    公开(公告)号：US5846309A

    公开(公告)日：1998-12-08

    申请号：US803349

    申请日：1997-02-20

    申请人： Gary M. Freeman ,  John M. M. Harrison ,  Kenneth B. Files

    发明人： Gary M. Freeman ,  John M. M. Harrison ,  Kenneth B. Files

    IPC分类号： C08K3/34 ,  C09C1/00 ,  C09C1/42 ,  C09C1/02

    CPC分类号： C09C1/42 ,  C08K3/346 ,  C09C1/0081 ,  C01P2004/20 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/22 ,  C01P2006/60 ,  C01P2006/80 ,  C08K2201/016

    摘要： A coarse particle kaolin clay is provided having an average Stokes equivalent particle diameter of about 4.5-6.0 microns, a BET surface area of about 8-11 m.sup.2 /g, and preferably having a median Malvern particle size of about 9.0-10.5 microns as determined by laser light-scattering measurement and a high aspect ratio preferably of about 12-14 as determined by Sphericity Model calculations. The coarse particle kaolin clay provides low viscosity build, good reinforcement properties and excellent surface finish qualities as a filler in thermoset composite materials, such as polyester molding compounds, and also provides excellent pigmenting properties in paints and industrial coatings. Preparation of the coarse particle clay involves blunging and degritting a crude kaolin clay, conducting three separate centrifugation steps with the desired product stream being, in sequence, the coarse underflow clay from the primary centrifuge, the coarse underflow from the secondary centrifuge, and then the fine overflow from the tertiary centrifuge, followed by magnetic separation, screening, chemical leaching, drying and milling to produce a kaolin clay product having the above-described physical properties and performance characteristics.

    摘要翻译： 提供粗颗粒高岭土，其平均斯托克斯当量粒径为约4.5-6.0微米，BET表面积为约8-11m 2 / g，优选具有约9.0-10.5微米的中值Malvern粒径，如所确定的 通过激光光散射测量和通过球形度计算确定的优选约12-14的高纵横比。 粗颗粒高岭土在热固性复合材料如聚酯模塑料中提供低粘度构造，良好的增强性能和优异的表面光洁度作为填料，并且还在油漆和工业涂料中提供优异的着色性能。 粗颗粒粘土的制备涉及对粗高岭土进行白化和碾磨，进行三个单独的离心步骤，其中所需产物流依次是来自主离心机的粗下游粘土，来自二次离心机的粗下游，然后是 来自三级离心机的细溢出，然后进行磁选，筛分，化学浸出，干燥和研磨以制备具有上述物理性能和性能特征的高岭土产品。