Patent GB-923429-A (GB)
Title: Reactive polymeric monochlorotriazine dyes
IPC: C09B62/04
Filed: 1959-12-18
Abstract: The invention comprises polymeric monochlorotriazine dyes of the formula ...-NH-D-NH-G-NH-D-NH-G-... where G is <FORM:0923429/IV(a)/1> and the D's are radicals of compounds having at least one chromophore and at least one sulphonic or carboxylic acid group per chromophore, the polymer chains being terminated by group of formula H2N-D, G-Cl or G-OH, D and G being as above, the dyes being characterized by their capacity to dye, from an alkaline aqueous bath, materials having OH, NH or NH2 groups by direct reaction therewith and having a higher percentage fixation on the fibre than is obtainable with analogous monomeric reactive dyes.  The dyes may be made in aqueous solution by condensing compounds of formula H2N-D-NH2 with a substantially equimolecular proportion of cyanuric chloride or bromide in the presence of an acid-absorbing agent first at 0 DEG -5 DEG C. and then at 10 DEG -70 DEG C., or by a similar condensation at 10 DEG -70 DEG C. of a compound of formula H2N-D-NH-G-Cl. Polymeric azo dyes may be obtained by conventional processes using tetrazo components and coupling components which will couple twice either type of component containing the group G.  Specified residues corresponding to D are derived from mono- and dis-azo, anthraquinone, dioxazine, phthalocyanine, safranine, triarylmethane and rhodamine dyes.  The dyes are used to colour materials such as paper, cellulosic fibres, wool, silk, leather, nylon and polyvinyl alcohol film.  Examples are provided of the preparation of the dyes and their use in colouring processes. Specification 775,308 is referred to. Reference has been directed by the Comptroller to Specification 797,946.ALSO:The invention comprises polymeric monochlorotriazine dyes of formula ,,,-NH-D-NH-G-NH-D-NH-G-,,, where G is <FORM:0923429/IV(a)/1> and the D's are radicals of compounds having at least one chromophore and at least one sulphonic or carboxylic acid group per chromophore, the polymer chain being terminated by groups of formula H2N-D, G-Cl or G-OH, D and G being as above, the dyes being characterized by their capacity to dye, from an aqueous alkaline bath, materials having OH, NH or NH2 groups by direct reaction therewith and having a higher fixation on the fibre than is obtainable with analogous monomeric reactive dyes. The dyes may be made, in aqueous solution, by condensing compounds of formula H2N-D-NH2 with a substantially equimolar proportion of cyanuric chloride or bromide in the presence of an acid-absorbing agent first at 0 DEG -5 DEG C., and then at 10 DEG -70 DEG C., or by a similar condensation at 10 DEG -70 DEG C. of a compound of formula H2N-D-NH-G-Cl.  Polymeric azo dyes may be obtained by conventional processes using tetrazo components and coupling components which will couple twice either type of component containing the group G. Specified residues corresponding to D are derived from mono- and dis-azo, anthraquinone, dioxazine, phthalocyanine, safranine, triarylmethane and rhodamine dyes.  The dyes are used to colour materials such as paper, cellulosic fibres, wool, silk, leather, nylon and polyvinyl alcohol film.  Examples are provided of the preparation of the dyes and their use in colouring processes. Specification 775,308 is referred to. p  Reference has been directed by the Comptroller to Specification 797,946.