Triarylmethane color-forming agents

US5094688A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Udo Eckstein · Cologne, DE
• Hubertus Psaar · Leverkusen, DE
• Gert Jabs

Key dates

• Filing date: Aug 12, 1988
• Grant date: Mar 10, 1992
• Expiry date: Aug 12, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M5/323
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Color-forming agents of the present formula ##STR1## wherein X denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino, PA0 R denotes alkyl, alkenyl or aralkyl, PA0 R.sub.1 denotes hydrogen, halogen or alkyl, PA0 R.sub.2 denotes alkoxy, aralkoxy, aryloxy or a radical of the formula ##STR2## Y.sub.1 and Y.sub.2 independently of one another denote alkyl, aryl, cycloalkyl or aralkyl or R.sub.2, with A in the o-position, forms a heterocyclic ring, PA0 a benzene ring can be fused onto the ring A, in the o-/m-position relative to R.sub.2, and the ring A and its fused-on rings and the cyclic and acyclic radicals can carry further non-ionic substitutents customary in dyestuffs chemistry, are used in thermoreactive papers and pressure-sensitive recording materials and for the preparation of highly concentrated solutions in organic solvents.