TiO.sub.2 slurry stabilization
    21.
    发明授权
    TiO.sub.2 slurry stabilization 失效
    TiO2浆料稳定

    公开(公告)号:US5989331A

    公开(公告)日:1999-11-23

    申请号:US861589

    申请日:1997-05-22

    IPC分类号: C09C1/36 C09C3/06 C04B14/10

    摘要: A stable aqueous pigment slurry and a process for preparing same. The slurry contains about 50 to 90 wt. %, based on the weight of the slurry, of a pigment such as titanium dioxide and about 0.2 to 3.0 wt. %, based on the weight of the slurry, of a smectite clay such as bentonite, hectorite or montmorillonite. Preferably, the pigment slurry also contains about 0.1 to 2.0 wt. %, based on the weight of the slurry, of a dispersant. The process involves admixing a pigment slurry and a smectite clay slurry and preferably also the dispersant by milling the three components together under high shear conditions.

    摘要翻译: 稳定的水性颜料浆料及其制备方法。 浆料含有约50至90wt。 %,基于浆料的重量,颜料如二氧化钛和约0.2至3.0重量% %,基于浆料的重量,蒙脱石粘土如膨润土,锂蒙脱石或蒙脱石。 优选地,颜料浆料还含有约0.1至2.0重量% %,基于浆料的重量分散剂。 该方法包括通过在高剪切条件下将三种组分一起研磨来混合颜料浆料和蒙皂石粘土浆料,并优选分散剂。

    Method for producing rheological additives and coating compositions
incorporating same
    22.
    发明授权
    Method for producing rheological additives and coating compositions incorporating same 失效
    流变添加剂的生产方法和包含其的涂料组合物

    公开(公告)号:US5785749A

    公开(公告)日:1998-07-28

    申请号:US802269

    申请日:1997-02-19

    摘要: An improved process for preparing an aqueous clay slurry having superior gellation properties. The process involves the bead milling of the clay in an aqueous medium for a period of about 0.5 to 20 minutes at an energy input level of about 44 to 146 kilowatt-hours per metric ton of dry clay. The milling may carried out using any suitable horizontal or vertical sand mill or ball mill such as the "Morehouse Cowles Sandmill" or the "Polymill" containing a grinding medium such as zirconium silicate or zirconium oxide. The clay is preferably a smectite clay such as montmorillonite and is present in the slurry in the range of about 3 to 30 wt. %, based on the total weight of the slurry. The aqueous clay slurry is useful as a rheological additive in water-based coating formulations.

    摘要翻译: 一种改进的制备具有优异凝胶化性质的含水粘土浆料的方法。 该方法包括在水性介质中以约0.5至20分钟的时间段在约44至146千瓦小时/公吨干粘土的能量输入水平下对粘土进行珠磨。 铣削可以使用任何合适的水平或垂直砂磨机或球磨机(例如“Morehouse Cowles Sandmill”)或包含研磨介质如硅酸锆或氧化锆的“Polymill”进行。 粘土优选是蒙皂石等蒙脱石粘土,并且在浆料中存在约3〜30重量%的范围。 %,基于浆料的总重量。 含水粘土浆料可用作水性涂料配方中的流变添加剂。