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:
Mar. 12, 2013
Filed:
Nov. 10, 2009
Manfred Bertzick, Bad Münsterifel, DE;
Werner Heister, Frechen, DE;
Wilfried Ostendorf, Erftstadt, DE;
Matthias Katzer, Heusenstamm, DE;
Manfred Bertzick, Bad Münsterifel, DE;
Werner Heister, Frechen, DE;
Wilfried Ostendorf, Erftstadt, DE;
Matthias Katzer, Heusenstamm, DE;
Evonik Carbon Black GmbH, Hanau, DE;
Abstract
The invention relates to carbon black granulates having an APC value, measured at a conveying speed of 8 m/s and a solid load of 27 g/kg, less than or equal to 20 and a 25 [mu]m pressure filter value of less than 5 bar cm2/g. The carbon black granulate is produced by carbon black powder being pre-granulated in a first mixing granulator with addition of a granulation liquid with or without binders and being granulated to a finished state in a second mixing granulator without further addition of granulation liquid. The carbon black granulate can be used as a filler, reinforcing filler, UV stabilizer, conductive carbon black, pigment, or reducing agent.