Novel dye salts of cationic dyes, having thiocyanatometallate or cyanatometallate complex anions for spin dyeing acid modified polyacrylonitrile

US4732573A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Kurt Hohmann · Ybbs an der Donau, AT
• Peter Mischke
• Wolfgang Teige · Kelkheim, DE

Key dates

• Filing date: Dec 23, 1986
• Grant date: Mar 22, 1988
• Expiry date: Dec 23, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/927
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Dye salts of a mono- or polycationic dye where the anion conforms to a general formula (1) or (2) EQU [Me (XCN).sub.4 ].sup.2(-) (1) EQU [Me (SCN).sub.6 ].sup.n(-) (2) in which PA0 Me in the formula (1) is the divalent zinc cation, the divalent iron cation, the divalent cobalt cation, the divalent tin cation or the divalent copper cation, and PA0 Me in the formula (2) stands for the divalent iron cation, the divalent nickel cation or the trivalent iron cation, PA0 X stands for an oxygen or sulfur atom and PA0 n depending on the valency of the corresponding metal cation, denotes the number 4 or 3. The novel dye salts can be obtained for example from aqueous solution or suspension by reacting the corresponding cationic dye which has a customary anion with a metal cation Me donor compound and an alkali metal thiocyanate or cyanate, alkaline earth metal thiocyanate or cyanate or ammonium thiocyanate or cyanate. They are used in particular in the spin-dyeing of acid-modified polyacrylonitrile and copolymers thereof.