发明名称 |
Process for the production of dis-azo pigment whose amine content is small, and pigment produced by said process |
摘要 |
A process for the production of a dis-azo pigment which is excellent in sanitary condition and almost free of a residual coupler component and decomposition products derived from the residual coupler component, and has a reduced aromatic amine content, and a dis-azo pigment produced by the said process, the process comprising the steps of (a) coupling-reacting a solution of a tetrazonium salt of benzidine with a slurry of acetoacetanilide of which the amount is stoichiometrically excess relative to an amount of said tetrazonium salt, to prepare a dis-azo pigment slurry, and (b) adding a halogen to the dis-azo pigment slurry to treat the acetoacetanilide in said slurry.
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申请公布号 |
US5489672(A) |
申请公布日期 |
1996.02.06 |
申请号 |
US19940329234 |
申请日期 |
1994.10.26 |
申请人 |
TOYO INK MANUFACTURING CO., LTD. |
发明人 |
SHIROMARU, OSAMU;SUGAMO, HITOSHI |
分类号 |
C09B35/035;C09B35/10;C09B67/54;(IPC1-7):C09B35/035 |
主分类号 |
C09B35/035 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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