禁用直接染料的二胺类化合物代用品评介（上）

德国政府规定的118种禁用染料中，直接染料占有65%，其中绝大部分是以联苯胺、联甲苯胺和联大茴香胺等二胺类为中间体合成的，所以用其它无害的二胺类化合物合成的直接染料，是禁用直接染料的主要代用品，是国内外染料厂商近年来研究和开发的热点，文章详尽地列举了六大类二胺类化合物合成的直接染料作为代用染料。

Harmless Diamines Compounds in Substitution for Banned Direct Dyes(I)

Direct dyes account for 65 percent of the 118 dyes banned by German Government. Among which,most of the banned direct dyes are synthetized with diamines such as benzidine,o-tolidine,o -dianisidine, etc. as intermediates. Therefore, the direct dyes synthetized from other harmless diamines,which has become a hot point of research and development for dye manufacturers both domestic andabroad in recent yars, are the primary substitutes for banned direct dyes. The'article describes in detail the six categories of direct dyes from harmless diamines.