Monoazo and disazo colorants
AssigneeSterling Drug Inc.
InventorNathan N. Crounse
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Abstract
This invention relates to novel (N-substituted sulfonamido) monoazo and disazo compounds, to acid-addition salts of said azo compounds which are useful as direct dyes particularly in the dyeing of cellulose, to novel (N-substituted sulfonamido) substituted nitrobenzene, aniline and acetanilide intermediates to said azo compounds and to methods of preparation of said azo compounds and said intermediates to said azo compounds.
Claims19
A disazo compound bearing (N-substituted sulfonamido) groups said disazo compound selected from the group consisting of ##STR41## in which R.sup.1 represents a moiety selected from the group consisting of alkylene-NH-alkylene-NH.sub.2, alkylene-N-(non-tertiary C.sub.1 to C.sub.14 alkyl).sub.2, ##STR42## in which alkylene represents --CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH.sub.2 CH.sub.2 --,
- R.sup.2, R.sup.3, and R.sup.4 represent hydrogen, C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 alkoxy;
- or the acid-addition salt forms of said disazo compounds.
Dependencies are inferred from the claim text.