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:
May. 24, 2011
Filed:
Aug. 15, 2005
Christopher M. Teeley, Louisville, KY (US);
David Kassin, Warren, MI (US);
Douglas L. Cochran, Elizabethtown, KY (US);
Christopher B. Palmer, Gregory, KY (US);
Norman E. Pratt, Northville, MI (US);
Christopher M. Teeley, Louisville, KY (US);
David Kassin, Warren, MI (US);
Douglas L. Cochran, Elizabethtown, KY (US);
Christopher B. Palmer, Gregory, KY (US);
Norman E. Pratt, Northville, MI (US);
Flint Group Incorporated, Plymouth, MI (US);
Abstract
A method for preparing an organic pigment dispersion, such as a flush pigment or ink product, comprises steps of introducing into a twin screw extruder a stable, water-borne pigment dispersion, an organic medium, and a destabilizing agent; mixing together the stable, water-borne pigment dispersion, the organic medium, and the destabilizing agent to produce a pigment flush phase and a water phase; and removing at least a part of the water phase. A twin-screw extruder for carrying out the flushing method has an addition and flushing zone, a water removal zone, and a zone for rinsing the crude organic pigment dispersion or flush with water and removing the rinse water. Additional materials may be added to form a finished pigmented product such as an ink product, masterbatch, or toner.