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. 08, 2017
Filed:
Jul. 03, 2009
Applicants:
Gottlieb-georg Lindner, Bonn, DE;
Michael Kempf, Rodenbach, DE;
Inventors:
Gottlieb-Georg Lindner, Bonn, DE;
Michael Kempf, Rodenbach, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/193 (2006.01); C09C 1/30 (2006.01); C09D 183/04 (2006.01);
U.S. Cl.
CPC ...
C01B 33/193 (2013.01); C09C 1/3081 (2013.01); C09D 183/04 (2013.01); C01P 2004/51 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/19 (2013.01); C01P 2006/40 (2013.01); Y10T 428/2982 (2015.01);
Abstract
Provided is a hydrophilic precipitated silica which is well suited to use in silicone rubber formulations (RTV-1, RTV-2, HTV and LSR), particularly well suited to use in HTV silicone rubber formulations. It has a BET surface area of 185˜260 m/g, a CTAB surface area of 100˜160 m/g, a BET/CTAB ratio of 1.2˜2.6, and a conductivity of <250 μS/cm. Also provided are a process for producing the precipitated silica and the use of the precipitated silica for thickening and reinforcing silicone rubber formulations.