Mixed crystals of benzimidazolonedioxazine compounds

US6762299B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Martin Schmidt · Frankfurt am Main, DE
• Peter Kempter · Bad Soden, DE
• Carsten Plueg · Bremke, DE
• Roland Born · Wiesmoor, DE

Key dates

• Filing date: Oct 24, 2001
• Grant date: Jul 13, 2004
• Expiry date: Feb 8, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0034
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A mixed crystal of two or more different benzimidazolonedioxazine compounds of the formula (1) whereX and X′ are identical or different and are hydrogen or halogen, R1, R1′, R2 and R2′ are identical or different and are hydrogen, C1-C18 alkyl, trifluoromethyl, C1-C18 alkylcarbonyl, C5-C6 cycloalkyl or phenyl which may be unsubstituted or substituted by one or more halogen atoms, nitro groups, trifluoromethyl, C1-C18 alkyl, C1-C18 alkoxy, C1-C18 alkylcarbonyl and/or C1-C18 alkoxycarbonyl groups.The mixed crystals are of low solubility and feature good fastness properties and red to blue colorations.The mixed crystals are suitable for pigmenting paints, plastics, printing inks, aqueous or solvent-based pigment preparations, electrophotographic toners and developers, powder coating materials, inks, preferably inkjet inks, color filters, and for coloring seed and cosmetics.