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:
Aug. 22, 2017
Filed:
Oct. 31, 2008
Christian Panz, Wesseling-Berzdorf, DE;
Helga Obladen, Bruehl, DE;
Karl Meier, Alfter, DE;
Markus Ruf, Alfter-Witterschlick, DE;
Rene Allerdisse, Bornheim, DE;
Dieter Kuhn, Rodenbach, DE;
Aziz El Moussaoui, Gelnhausen-Hoechst, DE;
Mario Scholz, Gruendau, DE;
Michael Kempf, Rodenbach, DE;
Christian Panz, Wesseling-Berzdorf, DE;
Helga Obladen, Bruehl, DE;
Karl Meier, Alfter, DE;
Markus Ruf, Alfter-Witterschlick, DE;
Rene Allerdisse, Bornheim, DE;
Dieter Kuhn, Rodenbach, DE;
Aziz El Moussaoui, Gelnhausen-Hoechst, DE;
Mario Scholz, Gruendau, DE;
Michael Kempf, Rodenbach, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
A precipitated silica having an SiOHabsorbance ratio of greater than or equal to 1.5, a silanol group density of 1 to 3.0 SiOH/nm, a modified tapped density of 1 to 50 g/l, and a pH of 3-5, when measured as a aqueous suspension of 5.00 g of the precipitated silica in 100 ml. of deionized water allows preparation of storage-stable RTV-1 silicone rubber formulations without stabilizer. A process for preparing the precipitated silica and its use in thickening sealants is provided.