Title:
MANUFACTURE OF CATIONIC POLYAZO DYE
Document Type and Number:
Japanese Patent JPS5744668
Kind Code:
A
Abstract:
To prepare concentrated solutions of cationic polyazo dyestuffs of the formula in which R represents hydrogen or methyl and R1 represents an alkyl radical which has 1 to 3 carbon atoms and is optionally substituted by hydroxyl, alkoxy or halogen, and mixing coupling products thereof with aromatic monoamines, diaminobenzenes of the general formula in which R has the abovementioned meaning, if appropriate mixed with up to 30 mol % of aromatic monoamines of the formula in which R2 represents hydrogen, C1- to C4-alkyl, C1- to C4-alkoxy or C1- to C4-acylamino and n denotes a number from 1 to 3, are dissolved in aliphatic carboxylic acids which have 2 to 4 carbon atoms and can optionally be substituted by halogen, hydroxyl or alkoxy, and are reacted with 0.5 to 0.75 mol of a salt or ester of nitrous acid per mol of diamine at 0 DEG to 30 DEG C.
Inventors:
KARURU RINHARUTO
HAARARUTO GURAINIHI
ROODERIHI RAUE
HANSUUPEETAA KIYUURUTAU
HAARARUTO GURAINIHI
ROODERIHI RAUE
HANSUUPEETAA KIYUURUTAU
Application Number:
JP10347581A
Publication Date:
March 13, 1982
Filing Date:
July 03, 1981
Export Citation:
Assignee:
BAYER AG
International Classes:
C09B35/03; C09B37/00; C09B41/00; C09B43/28; D06P3/58; (IPC1-7): C09B35/025; C09B44/04; D06P1/08; D06P3/60