申请人:Sandoz Ltd.
公开号:US04728464A1
公开(公告)日:1988-03-01
Compounds of formula I ##STR1## in which R is hydrogen, methyl or ethyl, R.sub.1 is methyl, ethyl, C.sub.1-4 alkoxy or halogen R.sub.2 is hydrogen, methyl or ethyl R.sub.3 is hydrogen, methyl or ethyl M is hydrogen or one equivalent of a cation and ring A may be unsubstituted or substituted by up to three substituents selected from C.sub.1-4 alkyl, C.sub.1-4 alkoxy, halogen and C.sub.2-4 acylamino are useful anionic dyestuffs having superior alkali resistance for the dyeing and printing of natural and synthetic polyamides, especially nylon.
式I的化合物##STR1##其中R为氢、甲基或乙基,R.sub.1为甲基、乙基、C.sub.1-4烷氧基或卤素,R.sub.2为氢、甲基或乙基,R.sub.3为氢、甲基或乙基,M为氢或一个阳离子当量,环A可以是未取代的或取代的,取代基可以是选自C.sub.1-4烷基、C.sub.1-4烷氧基、卤素和C.sub.2-4酰胺基的最多三个取代基。这些离子染料在天然和合成聚酰胺,特别是尼龙的染色和印刷中具有卓越的耐碱性。