Process for preparing pigments of the formula (I)
or tautomeric structures thereof and their hydrates, containing melamine as guest, characterized in that a mixture of the azobarbituric mono-cation salt (II) and the azobarbituric di-cation salt (III) is reacted with a nickel compound and melamine,
in which cation1, cation2 and cation3 independently of one another are any desired univalent cations or the fraction of any desired multivalent cation that corresponds to a positive charge of one.
制备公式(I)或其互变异构体和其
水合物的
颜料的过程,其中含有
三聚氰胺作为客体,其特征在于将偶氮基
巴比妥酸单阳离子盐(II)和偶氮基
巴比妥酸双阳离子盐(III)的混合物与
镍化合物和
三聚氰胺反应,其中阳离子1、阳离子2和阳离子3彼此独立,可以是任何所需的一价阳离子或相应于正电荷为1的任何所需多价阳离子的分数。