Fiber-reactive monoazo and disazo dyes
AssigneeBayer Aktiengesellschaft
InventorsKarl-Josef Herd, Peter Roschger
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Abstract
Preparation of water-soluble reactive dyes containing vinylsulphonyl and .beta.-sulphatoethylsulphonyl groups by the oxidation of dyes containing .beta.-hydroxyethylmercapto radicals, and then sulphation and, if appropriate, conversion of the .beta.-sulphatoethylsulphonyl radical to the vinylsulphonyl radical with bases. Novel fiber-reactive monoazo or disazo dyes of the structure ##STR1## wherein the substituents have the formulae given in the description and a method of coloring polyurethane plastics using dyestuffs of the formula ##STR2## as well as novel monoazo dyestuffs of the formula ##STR3##
Claims16
Dyestuff of the formula ##STR105## in which A represents phenylene or naphthylene, each of which is unsubstituted or substituted by alkyl or halogen,
- E represents C.sub.1 -C.sub.4 -alkylene,
- R.sup.1 represents hydrogen or represents a C.sub.1 -C.sub.6 -alkylene radical, which is unsubstituted or substituted by --Cl, --CN, amino, alkylamino, dialkylamino, C.sub.1 -C.sub.4 -alkoxycarbonyl, aminocarbonyl or phenyl,
- R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, halogen, hydroxyl, amino, acylamino or C.sub.1 -C.sub.6 -alkyl, or C.sub.1 -C.sub.6 -alkoxy, mono- or di-C.sub.1 -C.sub.6 -alkylamino, C.sub.1 -C.sub.6 -alkylthio, C.sub.1 -C.sub.6 -alkylsulphoxide or C.sub.1 -C.sub.6 -alkylsulphonyl, each of which is unsubstituted or substituted by hydroxyl or C.sub.1 -C.sub.4 -alkylene oxide units, or two of these radicals complete a fused benzene ring, which is unsubstituted or substituted,
- m represents a number from 1 to 4,
- n represents a number from 0 to 2,
- x represents 1 or 2, and
- y represents 0 or 1,
- z represents 0, 1 or 2,
- k represents a number from 1 to 4,
- the sum of x and y being 2.
A fiber-reactive monoazo or disazo dye of the structure ##STR110## wherein D is a benzene or naphthalene diazo component unsubstituted or substituted by substituents other than OH, NH.sub.2, monoalkylamino, dialkylamino and arylamino,
- X is CH.dbd.CH.sub.2 or CH.sub.2 CH.sub.2 OSO.sub.3 H, and
- R is H, C.sub.1 -C.sub.4 -alkyl, Cl--, OH--, CN--, CO.sub.2 H--, OSO.sub.3 H--, SO.sub.3 H--, SO.sub.2 X-- or C.sub.1 -C.sub.4 -alkoxy-substituted C.sub.1 -C.sub.4 -alkyl, allyl, benzyl or OH--, CO.sub.2 H-- or sulpho-substituted benzyl.
Process for colouring polyurethane plastics with dyestuffs, wherein at least one dyestuff of the formula ##STR114## in which A represents phenylene or naphthylene, each of which is unsubstituted or substituted by alkyl or halogen,
- E represents C.sub.1 -C.sub.4 -alkylene,
- R.sup.1 represents hydrogen or represents a C.sub.1 -C.sub.6 -alkylene radical, which is unsubstituted or substituted by --Cl, --CN, amino, alkylamino, dialkylamino, C.sub.1 -C.sub.4 -alkoxycarbonyl, aminocarbonyl or phenyl,
- R.sup.2, R.sup.3, R.sup.4 and R.sup.5 independently of one another represent hydrogen, halogen, hydroxyl, amino, acylamino or C.sub.1 -C.sub.6 -alkyl, or C.sub.1 -C.sub.6 -alkoxy, mono- or di-C.sub.1 -C.sub.6 -alkylamino, C.sub.1 -C.sub.6 -alkylthio, C.sub.1 -C.sub.6 -alkylsulphoxide or C.sub.1 -C.sub.6 -alkylsulphonyl, each of which is unsubstituted or substituted by hydroxyl or C.sub.1 -C.sub.4 -alkylene oxide units, or two of these radicals complete a fused benzene ring,
- m represents a number from 1 to 4,
- n represents a number from 0 to 2,
- x represents 1 or 2, and
- y represents 0 or 1,
- the sum of x and y being 2,
- is added to the reaction mixture of the polyol and polyisocyanate which are reacted to form the polyurethane or to one of said components before or during the reaction.
Dependencies are inferred from the claim text.