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:
Mar. 17, 2015
Filed:
May. 23, 2011
Stefan Scharfe, Erlensee, DE;
Andrea Heuschen, Floersbachtal, DE;
Christoph Batz-sohn, Morris Plains, NJ (US);
Burkhard Standke, Loerrach, DE;
Christian Wassmer, Hausen, DE;
Heinz Lach, Rodenbach, DE;
Stefan Scharfe, Erlensee, DE;
Andrea Heuschen, Floersbachtal, DE;
Christoph Batz-Sohn, Morris Plains, NJ (US);
Burkhard Standke, Loerrach, DE;
Christian Wassmer, Hausen, DE;
Heinz Lach, Rodenbach, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
Process for preparing a dispersion comprising silicon dioxide particles and cationizing agents, by dispersing 50 to 75 parts by weight of water, 25 to 50 parts by weight of silicon dioxide particles having a BET surface area of 30 to 500 m/g and 100 to 300 μg of cationizing agent per square meter of the BET surface area of the silicon dioxide particles, wherein the cationizing agent is obtainable by reacting at least one haloalkyl-functional alkoxysilane, hydrolysis products, condensation products and/or mixtures thereof with at least one aminoalcohol and water; and optionally removing the resulting hydrolysis alcohol from the reaction mixture. Also the process for preparing the dispersion, wherein the cationizing agent comprises one or more quaternary, aminoalcohol-functional, organosilicon compounds of formula III and/or condensation products thereof, wherein Ru and Rv are independently Calkyl group, m is 2-5 and n is 2-5.