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:
Jun. 18, 2002
Filed:
Aug. 18, 2000
Ronald Alfred Greinke, Medina, OH (US);
Graftech Inc., Lakewood, OH (US);
Abstract
Intercalated graphite flake is prepared having enhanced exfoliation characteristics in terms of at least one of reduced exfoliation temperature and increased expanded volume (also referred to as “worm volume”). The method entails contacting graphite flake with an organic expansion aid either before immersing in an aqueous intercalant solution or by dissolving the expansion aid in the aqueous intercalant solution prior to subjecting graphite flake to an electrolytic oxidation treatment therein. The graphite flake is subjected to electrolytic oxidation to provide intercalated graphite flake. Then, the intercalated graphite flake is recovered from the bulk of the intercalant solution and is preferably washed and further treated with a suitable surfactant in order to reduce the exposed gallery acids on the subsequently dried flake.