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    VERFAHREN ZUR NACHBEHANDLUNG VON TITANDIOXID-PIGMENTEN
    1.
    发明授权
    VERFAHREN ZUR NACHBEHANDLUNG VON TITANDIOXID-PIGMENTEN 有权
    法处理二氧化钛颜料的总量

    公开(公告)号：EP1776424B1

    公开(公告)日：2008-07-02

    申请号：EP05763398.4

    申请日：2005-07-08

    申请人： KRONOS INTERNATIONAL, INC.

    发明人： BLUEMEL, Siegfried ,  DREWS-NICOLAI, Lydia

    IPC分类号： C09C1/36

    CPC分类号： C09C1/3661 ,  C01P2002/30 ,  C01P2004/84 ,  C01P2006/64 ,  C08K3/22 ,  C08K9/02 ,  C09D7/62

    摘要： The invention relates to a method for the post-treatment of titanium dioxide for the production of particularly weather-resistant titanium dioxide pigments with good optical properties. The method is characterised in that in addition to the water-containing oxides of tin and zirconium, at least one further oxide of the group aluminium, silicon and titanium is co-precipitated on the particle surface. The addition of the post-treatment components to the aqueous TiO 2 suspension either occurs in acidic solution (pH value of max. 3) or in alkaline solution (pH value of min. 10). The pH value is subsequently adjusted to 6 to 8. By means of subsequent tempering of the pigment at elevated temperatures of over 125 and up to 500 °C, the colour tone b can be improved. The pigment is particularly suitable for use in dyes, paints and plastics.

    WITTERUNGSSTABILES TITANDIOXID-PIGMENT UND VERFAHREN ZU SEINER HERSTELLUNG
    2.
    发明公开
    WITTERUNGSSTABILES TITANDIOXID-PIGMENT UND VERFAHREN ZU SEINER HERSTELLUNG 有权

    公开(公告)号：EP1771519A1

    公开(公告)日：2007-04-11

    申请号：EP05760729.3

    申请日：2005-06-23

    申请人： KRONOS INTERNATIONAL, INC.

    发明人： BLUEMEL, Siegfried ,  DREWS-NICOLAI, Lydia

    IPC分类号： C09C1/36

    CPC分类号： C09C1/3661 ,  C01P2002/52 ,  C01P2004/84 ,  C01P2006/12 ,  C08K3/22 ,  C08K9/02 ,  C09D7/62

    摘要： The invention relates to a weather-stable titanium dioxide pigment, which has good optical properties and a dense silicon dioxide skin doped with metal atoms. Particularly suitable doping elements are tin, zirconium and titanium. The dense silicon dioxide skin consists of a number of layers, the innermost of which not containing a significant quantity of metal atoms. The inventive coating is produced by adding the constituents in succession into the alkaline suspension (pH value of at least 9) during which the pH value decreases. In order to completely form the doped dense SiO2 skin, it is necessary to slowly decrease the pH value until reaching a value less than 9. The pigment is particularly suited for use in paints, varnishes and plastics.

    摘要翻译： 本发明涉及一种耐候性好的二氧化钛颜料，其具有良好的光学性能和掺杂有金属原子的致密二氧化硅表层。 特别合适的掺杂元素是锡，锆和钛。 致密的二氧化硅表层由许多层构成，其中最内层不含大量的金属原子。 本发明的涂层通过将组分连续添加到pH值降低的碱性悬浮液（pH值至少为9）中来制备。 为了完全形成掺杂的致密SiO 2表皮，有必要缓慢降低pH值直到达到小于9的值。该颜料特别适用于油漆，清漆和塑料。

    OBERFLÄCHENBEHANDELTE TITANDIOXID-PIGMENTE FÜR KUNSTSTOFFE UND VERFAHREN ZUR HERSTELLUNG
    4.
    发明公开
    OBERFLÄCHENBEHANDELTE TITANDIOXID-PIGMENTE FÜR KUNSTSTOFFE UND VERFAHREN ZUR HERSTELLUNG 审中-公开
    表面处理的二氧化钛颜料，用于生产塑料和方法

    公开(公告)号：EP2358821A1

    公开(公告)日：2011-08-24

    申请号：EP09764448.8

    申请日：2009-11-18

    申请人： KRONOS INTERNATIONAL, INC.

    发明人： BLOESS, Stephan Peter ,  DREWS-NICOLAI, Lydia ,  JUERGENS, Volker ,  KUHN, Tino

    IPC分类号： C09C1/36

    CPC分类号： C09C1/3692 ,  C01P2006/12 ,  C09C1/3661 ,  C09C1/3684

    摘要： The invention relates to a weather-resistant titanium dioxide pigment that is particularly suited for use in technical plastics, and to a method for production. The titanium dioxide has a surface coating that comprises, from inside to outside, a dense SiO
    2 layer, an AI
    2 O
    3 layer and an organic layer, wherein the total AI
    2 O
    3 content equals 2.4 wt % at maximum and the organic layer comprises at least one bond from the group of H-siloxanes, silicon oils and organic functionalized polysiloxanes. The production method is characterized in that an aqueous suspension of AI-doped titanium dioxide particles is pulverized in an agitator mill, then a dense SiO2 and an AI
    2 O
    3 layer are applied in batch operation and subsequently an organic layer that comprises at least one bond from the group H-siloxanes, silicon oils and organic functionalized polysiloxanes is applied.

    MIT HOHLKÖRPERN BESCHICHTETES TITANDIOXID-PIGMENT UND VERFAHREN ZUR HERSTELLUNG
    10.
    发明公开
    MIT HOHLKÖRPERN BESCHICHTETES TITANDIOXID-PIGMENT UND VERFAHREN ZUR HERSTELLUNG 审中-公开
    与空心体包裹的二氧化钛颜料及其制备方法

    公开(公告)号：EP1994098A2

    公开(公告)日：2008-11-26

    申请号：EP07711855.2

    申请日：2007-03-08

    申请人： KRONOS INTERNATIONAL, INC.

    发明人： DREWS-NICOLAI, Lydia ,  BLUEMEL, Siegfried

    IPC分类号： C09C1/36

    CPC分类号： C09C1/3692 ,  C09C1/3661 ,  C09C1/3676 ,  D21H17/675 ,  D21H17/69 ,  D21H27/26

    摘要： The invention relates to a coated titanium dioxide pigment that has good opacity and good retention and is used in decorative paper. Also disclosed is a method for producing said pigment. The inventive pigment is characterized by a surface coating containing aluminum oxide phosphate and attached hollow bodies. The inventive production method is characterized in that an aluminum component and a phosphorus component are first introduced into a TiO2 suspension while the pH value does not drop below 10. Then the hollow bodies are added, whereupon at least one acidic component is added such that the pH value of the suspension is lowered to a value ranging between 4 and 9. In an alternative embodiment of said method, the suspension has a pH value of less than 4 when the aluminum component and the phosphorus component are added.