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    34.
    发明专利
    未知

    公开(公告)号：DE19516181A1

    公开(公告)日：1996-11-07

    申请号：DE19516181

    申请日：1995-05-03

    Applicant: BASF AG

    Inventor： SCHMID RAIMUND DR ,  MRONGA NORBERT DR ,  ADEL JOERG DR

    IPC: C09C1/64 ,  A61K8/11 ,  A61Q1/02 ,  B44F1/12 ,  C03C1/04 ,  C03C4/02 ,  C04B33/14 ,  C04B41/00 ,  C04B41/86 ,  C08K9/02 ,  C09C1/00 ,  C09C1/62 ,  C09C3/06 ,  C09D5/36 ,  C09D7/12 ,  C09D11/00 ,  C09D11/037 ,  C09D17/00 ,  C04B41/85 ,  A61K7/021

    Abstract: Goniochromatic lustrous pigments (G) based on metallic diskette substrates are coated with: (A) (hydrated) silica and/or (hydrated) alumina layer; (B) aluminium metallic layer allowing at least some visible light to pass through it; and (C) opt. outer layer of colourless or selectively absorbent metal oxide and/or one contg. phosphate, chromate and/or vanadate. Also claimed are the following : (i) lustrous pigment mixts. comprising (G) and silicate diskettes coated with a colourless or selectively absorbent metal oxide layer (A`), metallic aluminium layer (B`) through which visible light can pass and opt. outer layer (C`) of colourless or selectively absorbent metal oxide and/or one contg. phosphate, chromate and/or vanadate; (ii) prepn. of (G); and (iii) prepn. of aluminium-coated pigment diskettes by reacting volatile gaseous alkyl aluminium cpds. or aluminium hydride trialkylamine adducts in an inert atmos. in the presence of the diskettes. (C) contains (hydrated) SiO2, (hydrated) Al2O3, TiO2, ZrO2, Fe2O3 and / or Cr2O3. The substrates are coated only with (A) and (B). The metallic substrates comprise Al and are made by standard extrusion and grinding techniques. They may be coated with a ferromagnetic layer and/or passivated. AlH3 tri(1-4C alkyl)amine adducts or alkyl aluminium cpds. of the following formula are used to make Al-coated pigment plates: R aAlXb, where R = 1-4C alkyl, X = H or halogen; a = 1-3, and b = 0 - 2.

    Metallic pigments with multiple coatings
    39.
    发明专利
    Metallic pigments with multiple coatings 未知

    公开(公告)号：DE4405492A1

    公开(公告)日：1995-08-24

    申请号：DE4405492

    申请日：1994-02-21

    Applicant: BASF AG

    Inventor： SCHMID RAIMUND DR ,  MRONGA NORBERT DR

    IPC: A61K8/11 ,  A61Q1/02 ,  C03C1/04 ,  C03C4/02 ,  C04B33/14 ,  C04B41/00 ,  C08K9/02 ,  C09C1/00 ,  C09C1/62 ,  C09D5/36 ,  C09D7/12 ,  C09D11/00 ,  C09D17/00 ,  C09C1/64

    Abstract: Brilliant pigment based on metal flake substrate with several coatings has (A) a first coating of SiO2 and/or (hydrated) Al2O3; (B) a second coating of metal and/or metal oxide without selective absorption; and (C) opt. a third coating of metal oxide, which is colourless or has selective absorption. Coating (A) is applied by (a) a wet chemical method, involving hydrolytic decomposition of organic Si and/or Al cpds., in which the organic gps. are bound to the metal by O atoms, in the presence of an organic solvent for these cpds., and opt. drying. The application of coating (B) involves (b1) coating with metal by gas phase decomposition of volatile metal cps. in an inert atmos. or (b2) electroless wet chemical plating and opt. drying or (b3) coating with metal oxide by gas phase decomposition of volatile metal cpds. in the presence of O2 and/or water vapour. If necessary, coating (C) is applied by method (b3) or (a), using suitable metal cpds. Also claimed are pigment mixts. and methods for producing the pigments and SiO2-coated metal flake substrates.

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