Liquid inks comprising stabilizing plastisols

US6806013B2 · kind B2 · utility

Assignee

• SAMSUNG ELECTRONICS CO., LTD. · KR

Inventors

• Eric D. Morrison · West St. Paul, US
• Kam W. Law · Woodbury, US
• Julie Y. Qian · Woodbury, US
• James A. Baker · Hudson, US
• Christopher J. Wolters · Windom, US

Key dates

• Filing date: Jun 20, 2002
• Grant date: Oct 19, 2004
• Expiry date: Oct 28, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/101
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to a liquid ink for developing electrophotographic images comprising:a) a carrier liquid having a Kauri-Butanol number less than 30;b) a plastisol;c) a dispersant; andd) a charge directorwherein:a. for a positive charge director, the dispersant has amine groups and the plastisol comprises polymeric particles having acid groups and an acid value between 30 and 150 mg KOH/g such that the mole ratio of the amine groups to the acid groups is between 0.075 and 0.3; andb. for a negative charge director, the plastisol comprises a polymer having an amine value between 5 and 200 mg KOH/g and the dispersant has acid groups such that the mole ratio of the acid groups to the amine groups is between 0.075 and 0.3.