Fluoran colorants for recording systems

US4603202A · kind A · utility

Assignee

• BASF SE

Inventors

• Udo Mayer · Bischofswerda, DE
• Andreas Oberlinner · Ludwigshafen, DE

Key dates

• Filing date: Oct 12, 1984
• Grant date: Jul 29, 1986
• Expiry date: Oct 12, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D493/10
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Fluorans of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 is hydrogen or unsubstituted or substituted alkyl, R.sup.3 is hydrogen, unsubstituted or substituted alkyl, cycloalkyl or unsubstituted or substituted phenyl, or ##STR2## is a 5-membered or 6-membered saturated heterocyclic radical, R.sup.4 and R.sup.5 independently of one another are each hydrogen, alkyl, alkoxy or halogen, R.sup.6 is hydrogen, halogen, alkyl, alkoxy, phenylalkoxy, phenoxy, phenyl or unsubstituted or substituted amino, or is pyrrolidinyl, piperidinyl or morpholinyl, R.sup.7 is hydrogen, alkyl or halogen, R.sup.8 is C.sub.1 -C.sub.5 -alkyl, and the radicals R.sup.4 and R.sup.5 and/or R.sup.6 and R.sup.7 together may furthermore each be a --CH.dbd.CH--CH.dbd.CH-- bridge, and the fused-on benzo ring may be further substituted, are used for the preparation of pressure-sensitive and heat-sensitive recording materials.