Coated pearlescent pigments with SiO2 and cerium oxide

  • US 20060042509A1
  • Filed: 08/26/2005
  • Published: 03/02/2006
  • Est. Priority Date: 08/26/2004
  • Status: Active Grant
First Claim
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1. A pearlescent pigment with a platelet-shaped substrate comprising metal oxide and having a first and a second protective layer, said metal oxide having a refractive index of greater than 1.8, there being on the platelet-shaped substrate a first protective layer comprising cerium oxides, cerium hydroxide, or a mixture thereof and a second protective layer of SiO2, applied to which is an organic chemical aftercoat comprising at least one silane having at least one functional bond group and at least one silane without a functional bond group, it being possible for metal oxide layers other than cerium oxide and SiO2 to be disposed between the first and the second protective layer.

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