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. 24, 2013
Filed:
Feb. 01, 2011
Christian Panz, Wesseling, DE;
Rene Allerdisse, Cologne, DE;
Helga Obladen, Bruehl, DE;
Mario Loebbus, Aschaffenburg, DE;
Anja Lukas, Hanau, DE;
Roland Bergmann, Grosskrotzenburg, DE;
Karl Meier, Alfter, DE;
Christian Panz, Wesseling, DE;
Rene Allerdisse, Cologne, DE;
Helga Obladen, Bruehl, DE;
Mario Loebbus, Aschaffenburg, DE;
Anja Lukas, Hanau, DE;
Roland Bergmann, Grosskrotzenburg, DE;
Karl Meier, Alfter, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
A hydrophobic precipitated silica having a BET of less than 110 m/g, a CTAB of less than 150 m/g, a BET/CTAB ratio of less than 3, a carbon content of greater than 3.1%, a pH of 9.7 to 10.5, a DBP of less than 230 g/(100 g), and a methanol wettability of more than 50%. The hydrophobic precipitated silica is used in compositions including defoamers, silicone rubber and HTV crosslinkable silicone rubber compositions. The hydrophobic precipitated silica is also useful as a flow assistant and carrier or anti-blocking agent.