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    23.
    发明专利
    未知

    公开(公告)号：DE59400757D1

    公开(公告)日：1996-11-07

    申请号：DE59400757

    申请日：1994-07-05

    Applicant: BASF AG

    Inventor： SCHMID RAIMUND DR ,  MRONGA NORBERT DR ,  OSTERTAG WERNER DR ,  SCHMIDT HELMUT

    IPC: C09C1/28 ,  B44F1/12 ,  C04B14/02 ,  C04B33/14 ,  C08K9/02 ,  C09C1/00 ,  C09D7/12 ,  C09D11/00

    Abstract: Lustre pigments based on coated, plateletlike, silicatic substrates wherein the coating comprises a layer consisting essentially of carbon and aluminium oxide, chromium oxide, serium oxide, zirconium oxide and/or antimony oxide are obtainable by applying carbon-containing compounds of the metals aluminium, chromium, serium, zirconium, antimony or mixtures of these compounds and, if desired, further carbon-containing compounds of the empirical formula (CH2O)n, in which n is from 1 to 6 for one monomer unit, to the substrate particles and then thermally decomposing the carbon-containing compounds on the surface of the substrate particles under oxygen-excluding conditions.

    27.
    发明专利
    未知

    公开(公告)号：DE59000043D1

    公开(公告)日：1992-03-26

    申请号：DE59000043

    申请日：1990-04-30

    Applicant: BASF AG

    Inventor： WOLFF BERNARDO DR ,  MIELKE MANFRED ,  SEYBOLD GUENTHER DR ,  OSTERTAG WERNER DR ,  FRICKE JOCHEN PROF DR ,  CAPS ROLAND DR

    IPC: C01B33/155 ,  C01B33/158 ,  C04B14/06 ,  C04B30/00 ,  F16L59/00 ,  F16L59/02 ,  F16L59/08

    Abstract: The material is obtainable by a) reacting an aqueous dispersion of waterglass and a pigment with a strong acid and/or waterglass with a pigment-containing strong acid to give a pigment-containing silica hydrogel, the pigment being characterised in that it scatters, absorbs or reflects infrared radiation of wavelength 3 - 10 mu m, b) substantially freeing the pigment-containing silica hydrogel thus obtained from ionic constituents by washing out with water, c) displacing the water present in the hydrogel by means of a low- boiling liquid which is inert to the pigment-containing silica gel, d) heating the liquid-containing silica gel thus obtained with complete covering with the liquid to supercritical conditions and e) subsequently removing the liquid from the solid by flash evaporation at supercritical temperature.

    29.
    发明专利
    未知

    公开(公告)号：DE3770430D1

    公开(公告)日：1991-07-04

    申请号：DE3770430

    申请日：1987-12-09

    Applicant: BASF AG

    Inventor： WIENAND HENNING DR ,  OSTERTAG WERNER DR ,  SCHWIDETZKY CHRISTOPH DR ,  KNITTEL HELMUT DR

    IPC: C08K9/04 ,  C09C1/00 ,  C09C3/00 ,  C09C3/06 ,  C09C3/12 ,  C09D7/12

    Abstract: Thermostable bismuth vanadate/molybdate pigments are prepared by precipitating onto a pigment, obtained by calcination, of the formula Bi VO4.Bi2Mo O6 where n is 0.2-2.5, in aqueous suspension at 70 DEG -100 DEG C. within the pH range from 4 to 9.5 a first SiO2-containing layer using an alkali metal silicate solution of a magnesium hexafluorosilicate solution, maintaining the suspension at 70 DEG -100 DEG C. for not less than 1 hour, producing a thick coating on the precoated pigment by adding further alkali metal silicate solution, magnesium hexafluorosilicate solution or a mixture of the two within the pH range from 4 to 9.5, and finally depositing wax on the SiO2-containing layer by means of a waxing emulsion/dispersion, the products showing, compared with the starting pigment, an appreciably improved thermal stability in plastics.

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