Invention Grant
US5151129A Process for the production of pigments in the presence of an azo dyestuff
失效
在AZO DYESTUFF存在下生产色素的方法
- Patent Title: Process for the production of pigments in the presence of an azo dyestuff
- Patent Title (中): 在AZO DYESTUFF存在下生产色素的方法
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Application No.: US676402Application Date: 1991-03-28
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Publication No.: US5151129APublication Date: 1992-09-29
- Inventor: Donald J. Morrison , David McGregor , James M. McCrae
- Applicant: Donald J. Morrison , David McGregor , James M. McCrae
- Applicant Address: NY Ardsley
- Assignee: Ciba-Geigy Corporation
- Current Assignee: Ciba-Geigy Corporation
- Current Assignee Address: NY Ardsley
- Priority: GBX9007284 19900331
- Main IPC: C08K5/00
- IPC: C08K5/00 ; C09B41/00 ; C09B67/20 ; C09B67/22 ; C09D11/00 ; C09D11/02
Abstract:
A process for the production of a pigment composition comprising precipitating a pigment coupling component from alkaline solution by adding to it an acid, in the presence of a pre-formed, water-soluble azo dyestuff; and subsequently coupling the precipitated coupling component, containing the azo dyestuff, with a pigment diazo or tetrazo component, ensuring that at no time is any substantial amount of uncoupled diazo or tetrazo component present, to form a pigment composition containing the water-soluble azo dyestuff.
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