JPS5610567A - Production of azo pigment - Google Patents
Production of azo pigmentInfo
- Publication number
- JPS5610567A JPS5610567A JP8518779A JP8518779A JPS5610567A JP S5610567 A JPS5610567 A JP S5610567A JP 8518779 A JP8518779 A JP 8518779A JP 8518779 A JP8518779 A JP 8518779A JP S5610567 A JPS5610567 A JP S5610567A
- Authority
- JP
- Japan
- Prior art keywords
- substd
- solvent
- pigment
- azo pigment
- org
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Photoreceptors In Electrophotography (AREA)
Abstract
PURPOSE: To obtain easily a crystalline azo pigment having excellent electrophotographic characteristics such as sensitivity, repetition characteristics, by a method wherein a specified azo pigment obtd. from a hexazonium salt and a coupler such as Naphtol AS is treated with an org. solvent.
CONSTITUTION: A crude azo pigment of formula I [wherein A is a radical of formula II, III or IV (wherein X is (substd.) benzene, (substd.) naphthalene, (substd.) indole, etc.; Ar1 is (substd.) benzene, (substd.) naphthalene, (substd.) dibenzofuran, etc.; Ar2, Ar3 are (substd.) benzene, (substd.) naphthalene; R1, R2 are H, (substd.) lower alkyl. (substd.) phenyl; R3 is lower alkyl, carboxyl or ester thereof)] produced by using an org. solvent such as N,N-dimethyl-formamide as a reaction solvent, is washed with water, dried if necessary, and then treated with a desired org. solvent. The solvent is used in an amount of pref. at least 10 parts per part of the pigment. The effect can be enhanced by repeating the treatment several times. The pigment is treated with stirring at a temp. of room temp. to boiling point for 1W24hr. The pigment as a crystal is recovered by filtration.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8518779A JPS5610567A (en) | 1979-07-04 | 1979-07-04 | Production of azo pigment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8518779A JPS5610567A (en) | 1979-07-04 | 1979-07-04 | Production of azo pigment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5610567A true JPS5610567A (en) | 1981-02-03 |
Family
ID=13851647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8518779A Pending JPS5610567A (en) | 1979-07-04 | 1979-07-04 | Production of azo pigment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5610567A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2506776A1 (en) * | 1981-05-28 | 1982-12-03 | Ricoh Kk | NOVEL TRISAZOIC COMPOUNDS AND THEIR MANUFACTURING METHOD |
-
1979
- 1979-07-04 JP JP8518779A patent/JPS5610567A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2506776A1 (en) * | 1981-05-28 | 1982-12-03 | Ricoh Kk | NOVEL TRISAZOIC COMPOUNDS AND THEIR MANUFACTURING METHOD |
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