Title:
DISAZO REACTIVE DYE
Document Type and Number:
Japanese Patent JPS585367
Kind Code:
A
Abstract:
NEW MATERIAL:To provide a new disazo compd. for dye represented by formulaIin the form of a free acid (where X and Y are each H or a sulfonic acid group, with adjacent azo and sulfonic acid groups linked to a naphthalene ring to which X and Y are linked).
USE: Cellulosic fibre is dyed in blue to black color with excellent fastness to light and chlorine.
PREPARATION: A naphthylaminesulfonic acid deriv. of formula II is dissolved or suspended in water and is diazotized with sodium nitrite at below 20°C under an acidic condition given by mineral acid. After removal of excess nitrite with sulfamic acid, the diazotized product is coupled with monoazo dye of formula III.
Inventors:
OMURA TAKASHI
HARADA NAOKI
TEZUKA YASUO
HARADA NAOKI
TEZUKA YASUO
Application Number:
JP10379481A
Publication Date:
January 12, 1983
Filing Date:
July 01, 1981
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C09B62/513; (IPC1-7): C09B62/513
Attorney, Agent or Firm:
Kimura Katsuya
Next Patent: JPS585368