Pigment dispersions with polymeric dispersants having pending chromophore groups

US7582152B2 · kind B2 · utility

Assignee

• AGFA GRAPHICS NV · BE

Inventors

• Wojciech Jaunky · Wesel, DE
• Geert Deroover · Lier, BE
• Johan Loccufier · Zwijnaarde, BE
• Lambertus Groenendaal · Sinaai, BE

Key dates

• Filing date: Jun 23, 2006
• Grant date: Sep 1, 2009
• Expiry date: Jun 23, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/326
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A pigment dispersion includes a color pigment represented by formula (I):whereinR1 to R10 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF3, —COOH, —COOCH3, —SO2NH—C6H5, —CONH—C6H5, —CONH—C6H5—CONH2, and —CONH2; and a polymeric dispersant, having via a linking group covalently linked to its polymeric backbone, at least one pending chromophore group which has a molecular weight smaller than 95% of the molecular weight of said color pigment. The pigment dispersion can be advantageously used in inkjet inks.