The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2008
Filed:
Aug. 26, 2005
Frank Henglein, Nuremberg, DE;
Ulrich Schmidt, Hersbruck, DE;
Peter Krüger, Schnaittach, DE;
Günter Kaupp, Neuhaus, DE;
Frank Henglein, Nuremberg, DE;
Ulrich Schmidt, Hersbruck, DE;
Peter Krüger, Schnaittach, DE;
Günter Kaupp, Neuhaus, DE;
Eckart GmbH & Co. KG, Furth, DE;
Abstract
The invention relates to pearlescent pigments 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 oxide and/or cerium hydroxide and a second protective layer of SiO, 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 SiOto be disposed between the first and the second protective layer. The invention further relates to a process for preparing these pigments, and to the use thereof.