Patent · US Active

Amphoteric polyurethane dispersants and their use in inkjet inks

US8815979B2 · kind B2 · utility

2Cited by

18References

20Claims

0Family size

Assignee

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

Inventors

C. Chad Roberts · Wilmington, US
Patrick F. McIntyre · West Chester, US
Michael Stephen Wolfe · Wilmington, US

Key dates

Filing date	Dec 11, 2009
Grant date	Aug 26, 2014
Priority date	—
Expiry date	Aug 3, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D11/326
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The disclosure provides an aqueous dispersion and ink jet inks comprising a colorant and an amphoteric polyurethane dispersant, wherein the amphoteric polyurethane dispersant comprises a reaction product of at least one basic amine urethane monomer, at least one acidic urethane monomer, and at least one urethane monomer comprising two or more isocyanates having improved bleed control, and optical density/chroma.

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