Use of a liquid containing IR dyes as printing ink

US5282894A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Albert · Monsheim, DE
• Friedrich Closs · Bischofswerda, DE
• Juergen Kipper · Karlsruhe, DE
• Walter Kurtz · Bad Dürkheim, DE
• Karin H. Beck · Ludwigshafen, DE
• Rudolf Griebel · Siegburg, DE

Key dates

• Filing date: Jan 25, 1993
• Grant date: Feb 1, 1994
• Expiry date: Jan 25, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/037
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A liquid useful as printing ink contains one or more dyes with their absorption maximum within the range from 700 to 1200 nm selected from the phthalocyanines, the naphthalocyanines, the nickel-dithiolene complexes, the aminium compounds of aromatic amines, the methine dyes or the azulenesquaric acid dyes, as well as solvent and binder.