EP0024321A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cationic azo dyestuffs, their preparation, their use in colouring paper and compositions containing them
Assignee: Bayer AG
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Filing: 1980-08-02
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Granted: —
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Expires: 2000-08-02
Abstract
Abstract 1. Process for dyeing paper, characterised in that cationic azo dyestuffs of the general formula see diagramm : EP0024321,P8,F4 which can be symmetrical or asymmetrical, and wherein X**(+) denotes an ammonium group, m denotes 0 or 1, R1 denotes hydrogen, C1 - to C4 -alkyl, halogen or C1 -C4 -alkoxy, R2 and R3 independently of one another denote hydrogen, C1 - to C4 -alkyl, C1 - to C4 -alkoxy or acylamino and An**(-) denotes an anion, are used.
Inventors
- 👤 Horst Dr. Nickel
- 👤 Dr. Müller. Friedhelm
- 👤 Peter Dr. Mummenhoff
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/02; C09B44/04; D; D21; D21H; D21H21/00; D21H21/14; D21H21/28
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