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. 20, 2013
Filed:
Jul. 01, 2008
Applicants:
Juergen Meyer, Stockstadt, DE;
Mario Scholz, Gruendau, DE;
Kai Schumacher, Hofheim, DE;
Inventors:
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09K 3/00 (2006.01); C01B 33/12 (2006.01); B05D 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Surface-modified, pyrogenically prepared silica is prepared by subjecting the pyrogenically prepared silica, which is in the form of aggregates of primary particles having a BET surface area of 300±25 m/g and the aggregates have an average area of 4800-6000 nm, an average equivalent circle diameter (ECD) of 60-80 nm and an average circumference of 580-750 nm, to surface-modification in a known way. It can be used as a filler for controlling the rheology of liquid silicone rubber (LSR) systems.