Patent · US Active

Inkjet ink, ink set and method of using same

US8258203B2 · kind B2 · utility

2Cited by

14References

12Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Robert P. Held · Englishtown, US
C. Chad Roberts · Wilmington, US
Gregory R. Schulz · Fairfax, US

Key dates

Filing date	Dec 21, 2006
Grant date	Sep 4, 2012
Priority date	—
Expiry date	Jun 23, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B67/009
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention pertains to a black inkjet ink comprising aqueous vehicle and carbon black pigment stabilized to dispersion by a certain block copolymer dispersant. The invention further pertains to an ink set comprising this black ink and at least a second ink which contains a reactive species capable of destabilizing the carbon black dispersion. Still further, the invention pertains to a method of printing wherein the black ink and second ink are printed in an overlapping relationship, thereby minimizing penetration, feathering and/or bleed of the black pigment and improving print quality.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.