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:
May. 20, 2008
Filed:
Aug. 21, 2003
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-sohn, Hanau, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Werner Will, Gelnhausen, DE;
Gerrit Schneider, Hanau, DE;
Peter Neugebauer, Offenbach, DE;
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-Sohn, Hanau, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Werner Will, Gelnhausen, DE;
Gerrit Schneider, Hanau, DE;
Peter Neugebauer, Offenbach, DE;
Dequssa AG, Duesseldorf, DE;
Abstract
An aqueous dispersion, having a silicon dioxide powder having a silicon dioxide content of 10 to 60 wt.%, wherein the aqueous dispersion is stable in the pH range of 2 to 6, the aqueous dispersion additionally contains at least one compound, which is at least partially soluble in aqueous solution in the pH range 2 to 6 in the form of polyvalent cations, these being stable in a silicate-like environment as an anionic component of the particle surface of the silicon dioxide powder, the quantity of cation-providing compound in relation to the surface of the silicon dioxide is 0.001 to 0.1 mg cation-providing compound/msilicon dioxide surface, the cation-providing compound being calculated as the oxide, and the zeta potential of the aqueous dispersion has values of less than or equal to zero.