发明授权
US3701624A Dyeing cotton and paper with bis(arylazo or sulfoarylazo)-j-acid urea reaction mixture and composition therefor
失效
用BIS（ARYLAZO或SULFOARYLAZO）-J-酸的尿素反应混合物及其组合物的染色棉和纸
- 专利标题： Dyeing cotton and paper with bis(arylazo or sulfoarylazo)-j-acid urea reaction mixture and composition therefor
- 专利标题（中）： 用BIS（ARYLAZO或SULFOARYLAZO）-J-酸的尿素反应混合物及其组合物的染色棉和纸
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申请号： US3701624D申请日： 1971-02-01
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公开(公告)号： US3701624A公开(公告)日： 1972-10-31
- 发明人: FRANKLIN RICHARD C
- 申请人： DU PONT
- 专利权人： Du Pont
- 当前专利权人： Du Pont
- 优先权： US11160471 1971-02-01; US76496668 1968-10-03
- 主分类号： C09B33/10
- IPC分类号： C09B33/10 ; C09B41/00 ; C09B35/26 ; D06P1/04 ; D21H1/46
摘要：
DIRECT BIS(ARYLAZO- AND SULFOARYLAZO)-J-ACID UREA DYESTUFFS, USEFUL FOR DYEING CELLULOSIC MATERIALS, THEIR PREPARATION BY A PROCESS WHICH COMPRISES COUPLING AN ARYL OR SULFOARYL DIAZONIUM COMPOUND TO J-ACID UREA IN A NEUTRAL TO ALKALINE AQUEOUS MEDIUM TO WHICH IS ADDED A LITHIUM BASE SELECTED FROM THE HYDROXIDE, BICARBONATE AND CARBONATE, AND STABLE, UNIFORM, AQUEOUS, DYE PASTES OF SAID DYES.
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