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AssigneeCiba-Geigy Corporation
InventorsStefan Koller, Urs Karlen, Werner Kneubuhler, Raymond Defago
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The present invention provides useful new fibre-reactive disperse dyes of the formula (1) ##STR1## wherein R.sub.1 represents hydrogen or alkyl, R.sub.2 represents hydrogen, alkyl, cycloalkyl, aralkyl or substituted or unsubstituted phenyl, and R.sub.1 and R.sub.2, together with the nitrogen atom to which they are attached, can also form a 5- to 7-membered heterocyclic ring, R.sub.3 represents hydrogen or alkyl, R.sub.4 represents an alkyl radical of 1 to 6 carbon atoms which is substituted in .alpha.- and .beta.-position, preferably only in .alpha.-position, by halogen, for example bromine and above all chlorine, or represents an .alpha.,.beta.-unsaturated alkene radical which can be substituted in .alpha.- or .beta.-position by halogen, such as bromine and above all chlorine, A represents an alkylene or cycloalkylene radical which optionally contains oxygen or sulphur, X represents hydrogen, chlorine, bromine, cyano or COOR.sub.5, and R.sub.5 represents alkyl, A process for the manufacture of these anthraquinone dyes and a method of using them for dyeing and printing organic fibre material, in particular natural and synthetic polyamides, and the material which is dyed with these dyes.
In the method for the dyeing or printing of organic fiber material selected from the group of synthetic polyamide, natural polyamide and mixtures thereof which comprises contacting the said fiber with a dyestuff therefor, the improvement according to which the dyestuff is a reactive disperse dye of the formula ##STR14## wherein R.sub.1 represents hydrogen or alkyl,
In the dry heat transfer dyeing or printing process which comprises bringing an organic fiber material selected from the group of synthetic polyamide, natural polyamide and mixtures thereof into contact with the treated face of a carrier sheet containing at least one sublimable dyestuff, subjecting the material and carrier while in contact to a heat treatment to effect dyestuff transfer, and separating the material from the carrier sheet, the improvement according to which at least one sublimable dyestuff is a reactive disperse dye of the formula ##STR15## wherein R.sub.1 represents hydrogen or alkyl,
A process according to claim 2 wherein the carrier sheet is treated with a printing ink which contains at least one reactive disperse dye as defined in claim 22, optionally a binder which is stable below 230.degree. C, water and/or an organic solvent, and dried, the treated side of the carrier is then brought into contact with the surface of the organic material to be dyed, the carrier and material to be dyed are subjected, with or without mechanical pressure, to a heat treatment of 150.degree. to 230.degree. C for 3 to 60 seconds, and then the dyed material is separated from the carrier.
In a carrier for use in the dry heat transfer dyeing or printing process which carrier comprises a heat-stable flexible sheet material having at least one face thereof treated with a printing ink comprising at least one sublimable dyestuff, the improvement according to which at least one sublimable dyestuff is a reactive disperse dye of the formula ##STR16## wherein R.sub.1 represents hydrogen or alkyl,
Dependencies are inferred from the claim text.