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JPS5667370A - Preparation of azo pigment - Google Patents

Preparation of azo pigment

Info

Publication number
JPS5667370A
JPS5667370A JP14409379A JP14409379A JPS5667370A JP S5667370 A JPS5667370 A JP S5667370A JP 14409379 A JP14409379 A JP 14409379A JP 14409379 A JP14409379 A JP 14409379A JP S5667370 A JPS5667370 A JP S5667370A
Authority
JP
Japan
Prior art keywords
pigment
benzoic acid
azo dye
neutral
compound
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
Application number
JP14409379A
Other languages
Japanese (ja)
Inventor
Shigeru Jiyuzu
Yasuyuki Suzuki
Yoshiaki Hayashi
Hiroshi Nishino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP14409379A priority Critical patent/JPS5667370A/en
Publication of JPS5667370A publication Critical patent/JPS5667370A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To advantageously obtain an azo dye with excellent pigment suitability, industrially, by treating a specified azo dye with warming in a neutral or acidic aqueous suspension containing benzoic acid or benzoic acid and an inorganic acid, to convert into pigment.
CONSTITUTION: An azo dye of the formula is obtained by the diazotization of 1- amino-2-nitro-4-chlorobenzene, followed by coupling with 5-acetoacetylaminobenz- imidazolone. It is necessary to treat the compound for conversion into pigment, because it is composed of a hard particle which has no coloring power. Thus the compound of the formula is treated in a neutral or acidic aqueous suspension containing benzoic acid, or benzoic acid and an inorganic salt (e.g., sodium chloride and sodium sulfate), under normal or applied pressure, at about 40W150°C for about 3W20hr, to obtain a pigment with pigment suitability, composed of a smooth particle having no edge.
COPYRIGHT: (C)1981,JPO&Japio
JP14409379A 1979-11-06 1979-11-06 Preparation of azo pigment Pending JPS5667370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14409379A JPS5667370A (en) 1979-11-06 1979-11-06 Preparation of azo pigment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14409379A JPS5667370A (en) 1979-11-06 1979-11-06 Preparation of azo pigment

Publications (1)

Publication Number Publication Date
JPS5667370A true JPS5667370A (en) 1981-06-06

Family

ID=15354042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14409379A Pending JPS5667370A (en) 1979-11-06 1979-11-06 Preparation of azo pigment

Country Status (1)

Country Link
JP (1) JPS5667370A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210169A (en) * 1985-07-05 1987-01-19 バスフ　アクチェン　ゲゼルシャフト Toning of isoindoline pigment
JPH0551251U (en) * 1991-12-26 1993-07-09 東京電気株式会社 Electric razor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210169A (en) * 1985-07-05 1987-01-19 バスフ　アクチェン　ゲゼルシャフト Toning of isoindoline pigment
US4845214A (en) * 1985-07-05 1989-07-04 Basf Aktiengesellschaft Process for conditioning isoindoline pigments
JPH0551251U (en) * 1991-12-26 1993-07-09 東京電気株式会社 Electric razor

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