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1. (WO2001036543) OLIGOMERIC METHINE DYES

Pub. No.:    WO/2001/036543    International Application No.:    PCT/IB2000/001674
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Fri Nov 17 00:59:59 CET 2000
IPC: C09B 69/10
Applicants: CLARIANT FINANCE (BVI) LIMITED
CLARIANT INTERNATIONAL LTD.
Inventors: GEIWIZ, Jürgen
Title: OLIGOMERIC METHINE DYES
Abstract:
Oligomeric methine dye compounds or their mixtures obtainable by a diamine being reacted in a first step with at least 2.5 equivalents of a compound containing two leaving groups or groups capable of N-alkylation, in a second reaction step with an aromatic N-containing heterocyclic compound or a nucleophilic compound or a mixture thereof, in a third reaction step with an aldehyde and finally admixed in a fourth reaction step with an inorganic or organic acid, a storage-stable formulation thereof, their use for dyeing organic substrates and substances dyed with such dyes.