Thermochromic rylene dyes

US6486319B1 · kind B1 · utility

Assignees

• BASF SE
• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Arno Bohm · Mannheim, DE
• Heinrich Schmeisser · Ketsch, DE
• Stefan Becker · Mannheim, DE
• Klaus Müllen

Key dates

• Filing date: Feb 27, 2002
• Grant date: Nov 26, 2002
• Expiry date: Feb 27, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B5/62
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to rylene dyes of the general formula (I), wherein the variables have the following meanings: R represents hydrogen; optionally substituted C1-C30 alkyl-C5-C8-cycloalkyl, aryl or hetaryl; R′ represents optionally substituted C2-C30 alkyl or C5-C8 cycloalkyl, substituted methyl; and n is 0 or 1. The invention also relates to the preparation and use of said dyes for coloring highly molecular organic and inorganic materials and to 9-amino-perylene-3,4-dicarboxylic acid imides (Va) as their intermediate products.