Chromogenic 4,4-diaryl-dihydroquinazolones, their preparation and their use

US4695633A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Alfred Brack · Odenthal, DE

Key dates

• Filing date: May 17, 1985
• Grant date: Sep 22, 1987
• Expiry date: May 17, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M5/327
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Chromogenic 4,4-diaryl-dihydroquinazolones of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3 independently of one another represent hydrogen, halogen, alkyl, aryl, alkanoylamino, aroylamino, NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3, and wherein PA0 at least one of the radicals X.sup.1, X.sup.2 or X.sup.3 represents NY.sup.1 Y.sup.2, OY.sup.3 or SY.sup.3, PA0 R.sup.1 denotes hydrogen, alkyl, cycloalkyl, aralkyl, aryl or the members of a bridge to the o-carbon of ring C, PA0 R.sup.2 denotes hydrogen, alkyl, cycloalkyl, aralkyl, aryl, hetaralkyl or hetaryl, PA0 Y.sup.1, Y.sup.2 and Y.sup.3 independently of one another denote hydrogen, alkyl, cycloalkyl, aralkyl or aryl or the remaining members of a 5-membered or 6-membered ring which reaches to one of the benzene-C atoms in the o-position and optionally contains further hetero-atoms, or PA0 Y.sup.1 +Y.sup.2 denote the remaining members of a 5-membered or 6-membered ring which optionally contains further hetero-atoms, and the rings A, B and C and the radicals mentioned can in turn carry non-ionic substituents customary in dyestuff chemistry, are used in pressure-sensitive and thermoreactive recording materials.