Cassella Aktiengesellschaft

Hoechst Aktiengesellschaft

Reinhard Kuhn

Ulrich Buhler

Margareta Boos

Manfred Hahnke

Hubert Kruse

Horst Tappe

Klaus Hofmann

Albert Bode

Rudolf Binder

Reinhard Hahnle

Rudolf Schickfluss

Friedrich Schophoff

Margarete Boos

Hirotsugu Tsumura

Ulrich Bte,uml/u/ Hler

Margareta Boss

The present invention relates to valuable monoazo dyes of the general formula I ##STR1## in which R is methyl or ethyl,

Monoazo dyes, their preparation and use

The azo dyes of the formula I ##STR1## where X.sup.1 is for example hydrogen or (C.sub.1 to C.sub.6)alkyl,

Red 2,6-dicyanophenylazo dyes and the preparation and use thereof

The present invention relates to a process for the preparation of finished dyeings of high fastness to thermomigration on fibre materials consisting completely or partly of polyester, characterized in that the material is dyed with one or more dyestuffs of the general formula I ##STR1## wherein R denotes linear (C.sub.1 -C.sub.3)-alkyl or (C.sub.3 -C.sub.6)-alkyl which is interrupted by an oxygen atom and

Process for the preparation of finished dyeings which are fast to

Multi-component mixtures of bright red disperse azo dyestuffs

The invention relates to mixtures of monoazo dyes, which are characterized in that they consist of one or more dyes of the general formula I ##STR1## and one or more dyes of the general formula II ##STR2## where R.sup.1 is methyl, ethyl, n-propyl or i-propyl,

Mixtures of monoazo dyes: dicyano-nitrobenzene azo compounds

Monoazo dyestuffs useful for dyeing and printing hydrophobic fibers have the formula ##STR1## in which R.sup.1 denotes alkyl having 1 to 3 carbon atoms, R.sup.2 and R.sup.3 independently of one another denote alkyl having 2 to 5 carbon atoms and R.sup.4 denotes methyl or ethyl.

2-cyano-4,6-dimitro-phenyl monoazo dyestuffs

The present invention relates to a process for the dyeing and printing of blended fabrics made of polyester and natural fibre materials, characterized in that the polyester portion of the blended fabric is dyed and printed using one or more disperse dyes of the general formula I ##STR1## in which R is methyl, ethyl or alkyl having 2 or 3 C atoms, which is substituted by alkoxy having 1 to 3 C atoms, and

Process for the dyeing and printing of blended fabrics made of polyester

The dyestuff mixture contains at least one dyestuff of the formula I ##STR1## and at least one dyestuff of the formula II ##STR2## wherein X and Y denote chlorine or bromine,

Blue azo dyestuff mixture for strong blue color on hydrophobic fibers

Mixtures of monoazo dyes suitable for dyeing and printing hydrophobic fiber materials and mixtures thereof with natural fibers contain one or more dyes of the formula I ##STR1## and one or more dyes of the formula II ##STR2## in which Hal denotes bromo or chloro; R.sup.1 and R.sup.2, independently of one another, denote methyl or ethyl; R.sup.3, R.sup.4, R.sup.5 and R.sup.6, independently of one another, denote linear alkyl having 1 to 4 carbon atoms or alkenyl having 3 or 4 carbon atoms; and R denotes methyl, acetylamino, propionylamino, i-butyrylamino, or n-butyrylamino.

Mixtures of monoazo dyes containing halogen and cyano substituents

Since anthraquinonoid disperse dyes of the dark blue and navy region give only a low color strength on synthetic fibers, there was an urgent need for their coloristically advantageous substitution by high performance blue azo dyes which are suitable for being used in the carrier dyeing process. According to the invention, the systematic development of multi-component mixtures based on selected blue azo dyes from the dicyano azo series makes it possible to avoid most of the disadvantages mentioned.

Multi-component mixtures of blue disperse azo dyes for the dyeing of

Hydrophobic textile materials can be dyed or printed with one or more monoazo dyes of the formula ##STR1## in which R.sup.1 is fluoro, chloro or bromo;

Water-insoluble monoazo dyes, their preparation and use, and mixtures of

Dyeing formulations in solid or liquid form, containing one or more red disperse dyes of the general formula (1) ##STR1## where R.sub.1 denotes an alkyl group of 1 to 4 carbon atoms, and one or more red disperse dyes of the general formula (2) ##STR2## where R.sub.2 and R.sub.3 denote independently of each other the group --CH.sub.2 --CH.sub.2 --CH.sub.2 --COOCH.sub.3 or --CH.sub.2 --CH.sub.2 --CH.sub.2 --COOC.sub.2 H.sub.5 and R.sub.4 denotes a hydrogen, chlorine or bromine atom or a methyl group, one or more anion-active or nonionic dispersing agents and optionally water, wherein, based on the mixing ratio of the pure dyes to one another, the dyes of the formula (1) are present in a proportion of 15 to 85 percent by weight and the dyes of the formula (2) in a proportion of 85 to 15 percent by weight, and wherein the dyes have been brought into a state of extremely fine division by conjoint or separate wet grinding in the presence of a dispersing agent, and the use thereof for dyeing or printing polyester fibers or mixtures of polyester and cellulose fibers.

Dyeing formulations of mixtures of red disperse dyes for the washfast

A mixture of monoazo dyestuffs which contains one or more dyestuffs of the formula I ##STR1## and one or more dyestuffs of the formula II ##STR2## wherein R.sup.1 and R.sup.2 independently of one another each denote linear or branched alkyl with 1 to 6 carbon atoms, R denotes linear or branched alkyl with 1 to 5 carbon atoms and Hal denotes chloro or bromo, are outstandingly suitable for dyeing and printing hydrophobic materials.

Mixtures of blue disperse monoazo dyestuffs

Monoazo dyestuff of the formula ##STR1## wherein R.sup.1 is 4 alkyl having 1 to 3 carbon atoms, and

2-cyano-4,6-dinitrophenyl mono-azo dyes for polyester and cellulose

Polyester fibers which have a linear density of less than 0.1 den and a polyurethane content cannot be dyed in deep, bloomy blacks with the commercially available black and navy mixtures based on blue, yellow and red disperse dyes. This problem is overcome by using blue components which are derived from mixtures of selected disperse dyes of diazotized 1-amino-2,6-dicyano-4-nitrobenzene and coupling components from the series of specifically substituted N,N-dialkylanilines as a constituent for the trichromatic system.

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Frankfurt-am-Main, Germany

Reinhard Kuhn