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    3.
    发明专利
    未知

    公开(公告)号：BR9100361A

    公开(公告)日：1991-10-22

    申请号：BR9100361

    申请日：1991-01-29

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH ,  KISS AKOS ,  KLEINSCHMIT PETER

    IPC: C01G49/00 ,  C09C1/00 ,  C09C1/22 ,  C09C1/28

    Abstract: Inclusion pigments (I) are based on Zr silicate (II) as shell substance, in which coloured cpds. (Fe1-xMnx)2O3 of formula (III) are enclosed as discrete phase and are mixed crystals. In (III) x is 0.05-0.60. Pref. (Fe,Mn) zeolites are used as (III). Esp. x is 0.05-0.20 or 0.30-0.60. (I) are prepd. by calcining a mixt. of ZrO2 and SiO2 or their precursors in 1:1 molar ratio for 0.5-8 hrs. at 750-1200 deg.C in the presence of mineralisers and Fe and Mn cpds. or cpds. contg. Fe and Mn with an Fe/Mn atomic ratio of 90:10 to 20:80. Pref. calcination temp. is 850-1000 deg.C for an Fe/Mn ratio of 50:50-80:20 and 1050-1200 deg.C for an Fe/Mn ratio of 50:50-30:70. Unincluded Mn and Fe cpds. are removed by treating the calcined prod. with acid.

    4.
    发明专利
    未知

    公开(公告)号：DD292470A5

    公开(公告)日：1991-08-01

    申请号：DD33835690

    申请日：1990-03-02

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH ,  KISS AKOS ,  KLEINSCHMIDT PETER

    IPC: C01G49/00 ,  C09C1/00 ,  C09C1/36 ,  C09C3/06 ,  C04B41/00

    Abstract: Grey-black inclusion pigments are obtained by enclosing iron titanates of the formula FeTiO3 in zirconium silicate crystals. They are prepared by igniting a mixture of zirconium oxide having a particle size distribution of 6 to 10 mu m and a specific surface area of 2 to 5.2 m /g, silica and iron oxides and titanium oxides or iron compounds and titanium compounds forming oxides in the presence of mineralisers under oxidising conditions at 800 to 1300 DEG C.

    5.
    发明专利
    未知

    公开(公告)号：BR9001020A

    公开(公告)日：1991-02-26

    申请号：BR9001020

    申请日：1990-03-05

    Applicant: DEGUSSA

    Inventor： SPEER DIETRICH ,  KISS AKOS ,  KLEINSCHMIT PETER

    IPC: C01G49/00 ,  C09C1/00 ,  C09C1/36 ,  C09C3/06 ,  C09C1/28

    Abstract: Beige-brown encapsulated pigments are obtained by means of the encapsulation of iron titanates of the formula Fe2TiO5 in zirconium silicate crystals. The production takes place by calcining a mixture of zirconium oxide with a particle size distribution of /=4 m2/g, silicon dioxide and iron oxides and titanium oxides or oxide-forming Fe compounds and Ti compounds in the presence of mineralizers under oxidizing conditions at 800 DEG to 1300 DEG C.

    8.
    发明专利
    未知

    公开(公告)号：BR8802711A

    公开(公告)日：1988-12-27

    申请号：BR8802711

    申请日：1988-06-03

    Applicant: DEGUSSA

    Inventor： KISS AKOS ,  KLEINSCHMITT PETER ,  HANICH JURGEN ,  HALBRITTER GUENTER ,  HORST JENNY

    IPC: C09C3/06 ,  C09C1/00 ,  C09C1/40 ,  C09C1/42

    Abstract: Encapsulation pigments comprising chromophoric particles embedded in glaze-stable casings are prepared by means of calcination from the appropriate initial products. High yields and strong color intensities are obtained if the chromophoric substance or its initial compounds are bound in and/or to a zeolite and are calcined in this form with the remaining constituents.

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