Process for the production of precipitated silica
    4.
    发明授权
    Process for the production of precipitated silica 失效
    沉淀二氧化硅的生产工艺

    公开(公告)号:US5484581A

    公开(公告)日:1996-01-16

    申请号:US285672

    申请日:1994-08-04

    摘要: Precipitated silica which has a BET surface area of 10-130 m.sup.2 /g, a CTAB surface area of 10-70 m.sup.2 /g , an average particle diameter of 5-20 .mu.m, a Cu abrasion value in a 10% glycerol dispersion of 4-50 mg and thickening behavior in a CMC solution (20% dispersion) of 300-3500 mPa.multidot.s, is produced by simultaneously adding alkali silicate (weight modulus SiO.sub.2 :alkali oxide=2.5-3.9:1) and a mineral acid to an initial amount of water which has been adjusted to a pH value of 7.0 to 9.9 or 10.0 to 10.7 by the addition of water glass, holding the pH value constant between 7.0 and 9.9 or 10.0 to 10.7 during addition, wherein the initial precipitation temperature is 50.degree.-90.degree. C. and an increase in viscosity occurs after at most 25% of the duration of precipitation, adjusting the pH value to .ltoreq.6, preferably 3.5, once a silica content of greater than 120 g/l or greater than 150 g/l, preferably .gtoreq.160 g/l to 240 g/l, has been reached, separating the solid by filtration, washing, drying and grinding it. The precipitated silica may be used as an abrasive and/or thickening component in toothpastes.

    摘要翻译: BET表面积为10-130m2 / g,CTAB表面积为10-70m2 / g,平均粒径为5-20μm的沉淀二氧化硅,10%甘油分散体中的Cu磨损值 通过同时将碱金属硅酸盐(重量模量SiO 2:碱金属氧化物= 2.5-3.9:1)和无机酸同时加入到初始浓度为300-3500mPax的CMC溶液(20%分散体)中,4-50mg和增稠行为 通过加入水玻璃将pH值调节至pH7.0〜9.9或10.0〜10.7的水,在添加时保持pH值在7.0〜9.9或10.0〜10.7之间,其中初始沉淀温度为50℃ -90℃,并且在沉淀持续时间的至多25%之后发生粘度增加,一旦二氧化硅含量大于120g / l或大于150,则将pH值调节至≤6,优选3.5。 g / l,优选> = = 160g / l至240g / l,通过过滤,洗涤,干燥和研磨分离固体 注意 沉淀二氧化硅可用作牙膏中的研磨剂和/或增稠组分。

    Paints and printing inks containing modified carbon blacks
    6.
    发明授权
    Paints and printing inks containing modified carbon blacks 失效
    含有改性炭黑的油漆和印刷油墨

    公开(公告)号:US06379445B1

    公开(公告)日:2002-04-30

    申请号:US09643880

    申请日:2000-08-23

    IPC分类号: C09D1100

    摘要: Paints and printing inks are disclosed which contain carbon black as the pigment. The dispersion and storage stability of printing inks and paints may be improved by using carbon blacks containing silicon. The rheological behavior of the paints is improved by silicon-doping of the carbon blacks used. Paints having a reduced solvent content are consequently obtainable.

    摘要翻译: 公开了含有炭黑作为颜料的油漆和印刷油墨。 通过使用含硅的炭黑可以改善印刷油墨和油漆的分散和储存稳定性。 通过所使用的炭黑的硅掺杂改善了涂料的流变行为。 因此可获得具有降低的溶剂含量的涂料。