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. 16, 2014
Filed:
Jun. 16, 2005
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-sohn, Hanau-Mittelbuchen, DE;
Helmut Mangold, Rodenbach, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Werner Will, Gelnhausen, DE;
Sascha Reitz, Bruchkoebel, DE;
Wolfgang Lortz, Waechtersbach, DE;
Christoph Batz-Sohn, Hanau-Mittelbuchen, DE;
Helmut Mangold, Rodenbach, DE;
Gabriele Perlet, Grosskrotzenburg, DE;
Werner Will, Gelnhausen, DE;
Sascha Reitz, Bruchkoebel, DE;
Degussa AG, Duesseldorf, DE;
Abstract
Stable, pourable silicon dioxide dispersion, in which the average, number-related aggregate diameter of the silicon dioxide particles in dispersion is less than 200 nm, and which comprises at least 35 wt. % of a silicon dioxide powder, 3 to 35 wt. % of at least one polyol, 20 to 60 wt. % of water, 0 to 10 wt. % of an additive and a substance having an alkaline action in an amount such that a pH of 10<pH<12 is established. It can be prepared by a procedure in which silicon dioxide powder is introduced into water and a polyol in a rotor/stator machine, the pH being less than 5, and the mixture is dispersed until the current uptake of the rotor/stator machine is largely constant, and a substance having an alkaline action is subsequently added in an amount such that a pH of the dispersion of 10<pH<12 results, the substance having an alkaline reaction being added so rapidly that no gel formation takes place. It can be used as a component of a flame-retardant filling of hollow spaces between building components, in particular for insulating glass arrangements.