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EP0056577A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Triazolyl-coumarin derivatives, their preparation and use as optical brightening agents scintillators and dyestuffs for lasers

Assignee: Bayer AG
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Filing: 1982-01-07
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Granted: —
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Expires: 2002-01-07
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Abstract

Abstract Translated from German Optische Aufheller der Formel <IMAGE> worin B eine direkte Bindung oder den 1,4-Phenylenrest und R1 und R2 unabhängig voneinander Wasserstoff, gegebenenfalls substituiertes Alkyl, Aralkyl, Cycloalkyl oder Aryl bedeuten, oder gemeinsam einen anellierten aromatischen Ring bilden, bzw. deren Quaternierungs- und Protonierungsprodukte eignen sich hervorragend zum Weißtönen von Polyesterfasern bzw. Acrylfasern. Sie zeichnen sich durch gutes Aufbauvermögen und geringe Neigung zum Vergrünen aus. Optical brighteners of the formula <IMAGE> in which B is a direct bond or the 1,4-phenylene radical and R1 and R2 independently of one another are hydrogen, optionally substituted alkyl, aralkyl, cycloalkyl or aryl, or together form a fused aromatic ring or their quaternization - and protonation products are ideal for whitening polyester or acrylic fibers. They are characterized by good buildability and a low tendency to turn green.

Inventors

  • 👤 Horst Dr. Berneth
  • 👤 Roderich Dr. Raue

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 23:38
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07D233/00; C07D233/54; C07D233/56; C07D249/00; C07D249/02; C07D249/08

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

AT284834B Cited
AT311295B Cited
DE2844299A1 Cited
EP0021304A1 Cited

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