Rhodamine derivatives

US5410053A · kind A · utility

Assignee

• BASF SE

Inventors

• Erwin Hahn · Heidelberg, DE
• Claudia Kraeh · Ludwigshafen, DE
• Udo Mayer · Bischofswerda, DE
• Bernhard Albert · Monsheim, DE
• Walter Denzinger · Speyer, DE

Key dates

• Filing date: Mar 16, 1994
• Grant date: Apr 25, 1995
• Expiry date: Mar 16, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G9/0914
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

There are described rhodamine derivatives of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, or R.sup.2 is paired off with R.sup.5 or R.sup.4 with R.sup.6 to form 1,3-propylene, which can be substituted, PA0 R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each hydrogen or methyl, PA0 R.sup.9 is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl or a radical of the formula (C.sub.2 H.sub.4 O--).sub.n H, where n is 2 or 3, and PA0 An.sup..crclbar. is the equivalent of an anion derived from an addition or condensation polymer that contains acid groups, novel cyclic rhodamine dyes, and the use of the novel rhodamine derivatives and cyclic rhodamine dyes for dyeing polyacrylonitrile fibers, for incorporation into polymers or for preparing inks.