Printing ink, in particular ink-jet ink, containing pearlescent pigments based on fine and thin substrates

US8735461B2 · kind B2 · utility

Assignee

• ECKART GmbH · DE

Inventors

• Michael Grüner · Zwingenberg, DE
• Günter Kaupp · Jessenitz Siedlung, DE
• Stefan Engel · Aachen, DE
• Barbara Mendler · Meersburg, DE
• Ulrich Schmidt · Flörsheim, DE

Key dates

• Filing date: Jun 22, 2010
• Grant date: May 27, 2014
• Expiry date: Jun 22, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2200/308
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A printing ink, preferably ink-jet ink, containing pearlescent pigments and at least one of at least one solvent, at least one radiation-curable component and at least one binder, wherein the pearlescent pigments comprise a substantially transparent platelet-shaped substrate having a density ρS and at least one optically active coating having a density ρM, and the pearlescent pigments have a d90 value for a cumulative frequency distribution of a volume-averaged size distribution function with a range from 3.5 to 15 μm. The invention further relates to a process for producing the printing ink.