Ink-jet inks containing nanometer-size inorganic pigments

US6110266A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Juan Gonzalez-Blanco · Recklinghausen, DE
• Werner Hoheisel
• Peter-Roger Nyssen · Dormagen, DE
• Dirk Pfutzenreuter · Leverkusen, DE

Key dates

• Filing date: Oct 28, 1998
• Grant date: Aug 29, 2000
• Expiry date: Oct 28, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D17/004
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to pigment preparations containing (a) at least one pigment having an average primary particle size of 0.1 to 50 nm selected from the group consisting of carbides, nitrides, borides, and silicides of the elements Ti, Zr, Hf, Si, Ge, and Sn, (b) at least one dispersant having a weight average molecular weight (M.sub.w) greater than 1000, and (c) water. The invention further relates to the use of such pigment preparations in inks for ink-jet printing.