Basic diaminopyridine-(3)-azo dyestuffs
    1.
    发明授权
    Basic diaminopyridine-(3)-azo dyestuffs 失效
    基本二氨基吡啶 - (3)-AZO DYESTUFFS

    公开(公告)号:US4066637A

    公开(公告)日:1978-01-03

    申请号:US605786

    申请日:1975-08-18

    摘要: A basic azo dyestuff, which is free form acid groups conferring solubility in water, of the formula ##STR1## wherein two radicals Z represent groups of the formula --NR'R" and one radical Z represents a group of the formula --NR'R", --OR'" or --SR'", wherein R', R", and R'" each represents hydrogen, aryl, cycloalkyl or an aliphatic radical and R' and R" are able to form a ring containing the amino nitrogen and the radicals --NR'R" may be the same or different, R is alkyl, substituted alkyl or cycloalkyl, n is 1 or 2, Y represents a radical of the formula --CN or --CONH.sub.2, and D represents the radical of an aromatic or heterocyclic diazo component, and wherein at least one radical Z and/or D contains a basic, optionally cationic group. These dyestuffs are useful for dyeing and printing synthetic fibers to produce intensive and level dyeings with good fastness to light and general fastness properties.