Title:
PRODUCTION OF BETA-TYPE DIOXAZINE PIGMENT
Document Type and Number:
Japanese Patent JP2683458
Kind Code:
B2
Abstract:
PURPOSE: To efficiently obtain a pigment excellent in coloring power, gloss and producibility, useful for printing inks, coatings etc., by incorporating crude dioxazine with a specified amount of a specific dioxazine derivative in the presence of a grinding auxiliary such as an inorganic salt followed by conducting wet grinding.
CONSTITUTION: The pigment can be obtained by incorporating (A) 100 pts.wt. of crude dioxazine with (B) 0.2-20 pts.wt. of a dioxazine derivative of the formula [Q is dioxazine residue; R1 and R2 are each (substituted) alkyl, etc.; m and n are each 1-4] in the presence of, as grinding auxiliary, an inorganic salt such as sodium chloride, and at least one kind of organic liquid selected from alcohols such as n-propyl alcohol and polyols such as ethylene glycol, followed by conducting grinding.
Inventors:
Osamu Jomaru
Application Number:
JP6794991A
Publication Date:
November 26, 1997
Filing Date:
March 07, 1991
Export Citation:
Assignee:
Toyo Ink Mfg. Co., Ltd.
International Classes:
C09B67/20; C09B19/00; C09B67/48; (IPC1-7): C09B67/48; C09B19/00; C09B67/20
Domestic Patent References:
| JP5817167A | ||||
| JP63146966A | ||||
| JP2102272A | ||||
| JP6348357A |