Pigment based inks for high speed durable inkjet printing

US8187371B2 · kind B2 · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Thomas B. Brust · Webster, US
• Michael J. Carmody · Webster, US
• Robert H. Fehnel · Rochester, US
• Gary L. House · Rogersville, US
• Mark E. Irving · Rochester, US
• Yongcai Wang · Rochester, US
• Paul D. Yacobucci · Rochester, US

Key dates

• Filing date: Feb 12, 2008
• Grant date: May 29, 2012
• Expiry date: Sep 17, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/322
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An ink composition comprising (a) water, (b) pigment particles, (c) at least one humectant, (d) at least one polyurethane having an average molecular weight of at least about 10,000 and a sufficient number of acid groups to provide an acid number from 60 to about 130, and being present at a weight concentration of greater than 0.7%, and (e) at least one water soluble acrylic polymer comprising carboxylic acid groups, present at a weight concentration of greater than 0.6%, wherein the acid groups on the polyurethane and acrylic polymers are at least partially neutralized only with a monovalent inorganic base.