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    • 62. 发明授权
    • Single-step process for the preparation of bis-(acetoacetylamino)
benzene disazo pigments
    • 用于制备双(乙酰乙酰氨基)苯二偶氮颜料的单步方法
    • US5559216A
    • 1996-09-24
    • US115894
    • 1993-09-01
    • Ruediger JungJoachim WeideHans J. Metz
    • Ruediger JungJoachim WeideHans J. Metz
    • C09B33/153C09B41/00C09B67/20C09D11/037B41M1/00C09B56/12C09D11/02
    • C09D11/037C09B33/153C09B41/005C09B67/006
    • An ecologically and economically advantageous process for preparing a disazo pigment of the formula (I) or a mixture of said disazo pigments ##STR1## where D.sup.1 and D.sup.2 are identical or different and each is unsubstituted phenyl, phenyl with from 1 to 5 substituents, unsubstituted naphthyl, naphthyl with from 1 to 3 substituents, unsubstituted anthraquinonyl, anthraquinonyl with from 1 to 3 substituents, or a radical of a fused aromatic heterocycle which contains from 1 to 3 identical or different heteroatoms from nitrogen or oxygen and sulfur and is unsubstituted or has from 1 to 3 substituents,R.sup.1 and R.sup.2 are identical or different and each is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.5 -alkoxycarbonyl, nitro, cyano, phenoxy or trifluoromethyl, by azo coupling, comprisesa) azo coupling in an aqueous medium and in the absence of an organic solvent in a single step andb) adding at the latest immediately prior to the isolation of the disazo pigment at least one nonionic surfactant which has a cloud point in aqueous solution.
    • 用于制备式(I)的双偶氮颜料或所述双偶氮颜料(I)的混合物的生态和经济上有利的方法,其中D1和D2相同或不同,并且各自为未取代的苯基,具有1至5个的苯基 取代基,未取代的萘基,具有1至3个取代基的萘基,未取代的蒽醌基,蒽醌基与1至3个取代基,或稠合芳族杂环基团,其含有1至3个相同或不同的来自氮或氧和硫的杂原子,并且为 未取代或具有1至3个取代基,R 1和R 2相同或不同,各自为氢,卤素,C 1 -C 4 - 烷基,C 1 -C 4 - 烷氧基,C 1 -C 5 - 烷氧基羰基,硝基,氰基,苯氧基或三氟甲基, 偶氮偶合包括:a)在水性介质中偶氮偶合,并且在单一步骤中不存在有机溶剂,和b)在分离双偶氮颜料之前立即加入至少一种非离子表面活性剂 nt在水溶液中具有浊点。