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:
Dec. 12, 2006
Filed:
Jul. 12, 2004
Lydia Drews-nicolai, Köln, DE;
Siegfried Bluemel, Ratigen, DE;
Volker Jürgens, Kirchhundem, DE;
Volker Schmitt, Leichlingen, DE;
Lydia Drews-Nicolai, Köln, DE;
Siegfried Bluemel, Ratigen, DE;
Volker Jürgens, Kirchhundem, DE;
Volker Schmitt, Leichlingen, DE;
Kronos International, , DE;
Abstract
The invention relates to a method for the surface treatment of a titanium dioxide that leads to pigments with improved retention and improved opacity, where consistently high opacity can be obtained using less pigment. The method is characterised in that an aluminium component and a phosphorus component are first added to a TiOsuspension, during which process its pH value does not drop below 10. The pH value of the suspension is subsequently lowered to below 9 by adding an acid component. The pigment produced by the method according to the invention is eminently suited to use in decorative laminating paper.