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    • 30. 发明授权
    • Preparation of 1:2 chromium complex azo dyes asymmetrically substituted
with solubilizing
    • 制备1:2铬复合偶氮染料不溶解取代的增溶剂
    • US4997917A
    • 1991-03-05
    • US707924
    • 1985-03-04
    • Walter IffDaniel ParisotHans Schaller
    • Walter IffDaniel ParisotHans Schaller
    • C09B45/16C09B41/00C09B45/01C09B55/00C09B56/02
    • C09B45/01C09B55/001
    • The invention relates to a process for the preparation of asymmetrical 1:2 chromium complex dyes of not less than 90% purity and containing at least one water-solubilizing group, which process comprises reacting a mixture of two metallizable azo dyes that contain different diazo components and different coupling components, or a mixture of a metallizable azo dye and a metallizable azomethine dye, in the molar ratio of 0.85:1.0 to 1.2:1.0, with the proviso that only one of said two mixture components contains at least one water-solubilizing group, with a chromium donor, under pressure and at a temperature above 100.degree. C. and in the pH range from 0 to 2, and subsequently carrying out further reaction in a weakly acid, neutral or weakly alkaline pH range, utilizing a single vessel for all steps.The dyes obtained by the process of the invention are particularly suitable for dyeing wool or polyamide materials.
    • 本发明涉及一种制备不小于90%纯度且含有至少一种水溶性基团的不对称1:2铬络合物染料的方法,该方法包括使含有不同重氮组分的两种可镀金属偶氮染料的混合物 和不同的偶联组分,或金属化偶氮染料和金属化偶氮甲碱染料的混合物,其摩尔比为0.85:1.0至1.2:1.0,条件是所述两种混合物组分中只有一种含有至少一种水溶性 与铬供体在压力下,温度高于100℃,pH范围为0至2之间,随后在弱酸,中性或弱碱性pH范围内进行进一步反应,利用单一容器 为所有步骤。 通过本发明的方法获得的染料特别适用于染色羊毛或聚酰胺材料。