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. 06, 2013
Filed:
Nov. 20, 2009
C. Chad Roberts, Hockessin, DE (US);
Robert Paul Held, Newark, DE (US);
Patrick F. Mcintyre, West Chester, PA (US);
Christian Jackson, Wilmington, DE (US);
C. Chad Roberts, Hockessin, DE (US);
Robert Paul Held, Newark, DE (US);
Patrick F. McIntyre, West Chester, PA (US);
Christian Jackson, Wilmington, DE (US);
E I du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The present disclosure provides a aqueous colorant dispersion comprising a colorant and a polymeric dispersant, wherein the polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment having a block size of about 5 to about 18 units, is substantially free of hydroxyethylmethacrylate, and comprises at least 50% by weight of a monomer, having the following structure: CH═CRC(O)O(CHRCHO)nR, wherein R and Rare H, or methyl; Ris alkyl of 1-4 carbon atoms or phenyl; and n is about 1 to about 20; and the B block is a segment comprising an ionic monomer and at least one hydrophobic monomer; and wherein the dispersant is neutralized. The disclosure further pertains to an aqueous ink jet ink comprising this aqueous colorant dispersion. Still further, the disclosure pertains to a method of printing that provides images with the requisite optical density and chroma needed for emerging ink jet applications.