NEW MATERIAL:Novel dioxazine compounds of formulaIwherein R is methyl, n-propyl, n-butyl, methoxyethyl, ethoxyethyl, methoxypropyl.
USE: The compounds have blue to reddish purple tone, a high tinting strength, and excellent resistance to light, heat, bleed and solvents, and are used for coloring of printing ink, paints, natural and synthetic resins and spinning solution, or for pigment printing of fibrous materials.
PREPARATION: Two mol of a carbazole compd. of formula II is condensed with one mol of chloranil in an inert solvent such as 0-dichlorobenzene in the presence of an acid acceptor such as potassium carbonate. Then the condensate is cyclized with heating in the presence of a cyclizing agent such as p-toluenesulfonyl chloride to obtain the desired dioxazine compd.
URABE TAKAYUKI
SHINDOU SHIGETO
NISHI KENICHIROU
| JPS55104352A | 1980-08-09 |