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:
Feb. 19, 2013
Filed:
Mar. 05, 2009
Wolfgang Lortz, Waechtersbach, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Uwe Diener, Grosskrotzenburg, DE;
Sascha Reitz, Hanau, DE;
Wolfgang Lortz, Waechtersbach, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Uwe Diener, Grosskrotzenburg, DE;
Sascha Reitz, Hanau, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
Aqueous dispersion which comprises hydrophobized silicon dioxide particles and in each case one or more dispersing additives, a basic composition, and which is free of color pigments, inactive fillers and binders, in which the hydrophobized silicon dioxide particles have a methanol wettability of 30 to 60 and are present in the dispersion with a proportion of 0.1 to 50% by weight,—the proportion of water is 30 to 90% by weight based on the dispersion,—the dispersing additive is at least one phosphate ester of an ethoxylated alcohol having 8 to 18 carbon atoms, the proportion of which is 3 to 25% by weight based on the proportion of the hydrophobized silicon dioxide particles,—the basic composition comprises or consists of one or more amines of the general formula RNH, RNH and RN, where R is an alkyl group or a hydroxyl-substituted alkyl group having in each case 2 to 10 carbon atoms, and is present with a proportion of 5 to 30% by weight based on the proportion of hydrophobized silicon dioxide particles,—the dispersion further comprises one or more polyols having 2 to 15 carbon atoms, the proportion of which is 1 to 10% by weight based on the proportion of hydrophobized silicon dioxide particles,—the pH of the dispersion being 9 to 11.