摘要:
Disclosed are compounds of formula (1) or formula (2). The compounds are useful for the dyeing of organic materials, such as keratin fibers, wool, leather, silk, cellulose or polyamides, especially keratin-containing fibers, cotton or nylon, and preferably hair, more preferably human hair. (1) (2). A-(X1)p—(Csat)r—S—S—(Csat)q—(X2)p-D (1)
摘要:
A process for the preparation of certain cationic azo compounds is described, as well as the use thereof for dyeing keratin-containing fibres, especially human hair, in which specific cationic azo dyes are used.
摘要:
Azoxy dyes of the general formula I in the form of the free acid where n is 0 or 1, each R1 is selected from the group consisting of methoxy, hydroxyl and carboxyl, each R2 is selected from the group consisting of carboxyl, amino, C1-C4-alkylamino, allylamino, benzylamino and methoxycarbonylmethylamino, and the phenyl rings A may additionally be substituted by C1-C8-alkyl, unsubstituted or methyl- or halogen-substituted phenyl, hydroxyl, amino, nitro, halogen, carboxyl, N-benzylcarbamoyl, unsubstituted or nitro-, halogen-, C1-C4-alkoxy- or acetoxy-substituted phenylcarbamoyl and naphthylcarbamoyl or be benzofused, their copper complexes, a process for preparing the copper complex dyes, azoxy dyes of the formula I in their partially or completely deacylated form, their copper complexes, colorants comprising these azoxy dyes and/or their copper complexes and also their use for dyeing and printing natural or synthetic substrates.
摘要:
Reactive dyestuffs of the formula (I) ##STR1## wherein A denotes the radical of a diazo component andX is a fibre-reactive heterocyclic radicalare obtained by hydrolysis of maleylated azo dyestuffs of the formula (IV) ##STR2## and subsequent reaction with reactive components of the formula X-Hal without intermediate isolation, the other substituents having the meaning given in the description.
摘要:
Novel diazonium compounds and methods for their preparation are disclosed. Specifically, 1-(4'-diazoniumphenyl)-1,2-dihydro pyrid-2-imino-sulfinate is prepared by rearrangement of 2-(4'-diazobenzene-sulfonylamino)-pyridine, and 1-(4'-diazoniumphenyl)-2-amino-pyridinium salts are obtained by reaction of 1-(4'-diazoniumphenyl)-1,2-dihydro-pyrid-2-imino-sulfinate with aqueous acids. The novel compounds are useful as precursors for azo dyestuffs.