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:
Nov. 30, 2010
Filed:
Jan. 30, 2007
Siegfried Blümel, Ratigen, DE;
Lydia Drews-nicolai, Köln, DE;
Volker Jürgens, Kirchhundem, DE;
Volker Schmitt, Leichlingen, DE;
Siegfried Blümel, Ratigen, DE;
Lydia Drews-Nicolai, Köln, DE;
Volker Jürgens, Kirchhundem, DE;
Volker Schmitt, Leichlingen, DE;
Kronos International Inc, Leverkusen, DE;
Abstract
The invention relates to a rutile titanium dioxide pigment for use in decorative laminating papers that yields higher opacity of the papers compared to the prior art, as well as a method for its manufacture. The pigment displays a surface coating that contains aluminum phosphate, aluminum oxide, silicon oxide and titanium oxide. The silicon oxide is precipitated in fluffy form. The coated particles display a BET value of at least 15 m/g. The manufacturing method is characterized in that an aluminum and a phosphorus component are first added to a TiOsuspension. Thereafter, an alkaline silicon component, an acid-reacting titanium component and, optionally, a further pH-regulating component are added, the pH value being set in the range from 4 to 9 in this context.