Bleaching and dyeing; fluid treatment and chemical modification – Reactive dye composition – process – or product – Alkylene sulfato – halotriazine – halodiazine,...
Patent
1998-08-11
2000-03-28
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Reactive dye composition, process, or product
Alkylene sulfato, halotriazine, halodiazine,...
8638, 8641, 8918, 8924, 8682, 534638, 534753, 534772, 534784, 534786, 534885, 534886, C09B 62085, C09B 6722, D06P 1382
Patent
active
060426217
DESCRIPTION:
BRIEF SUMMARY
This invention relates to fibre-reactive dyestuffs, a process of making the same and to their use in dyeing or printing hydroxy-group-containing or nitrogen-containing organic substrates.
According to the invention there is provided a fibre-reactive dyestuff which is a compound of the formula (I) ##STR2## or a salt thereof.
When a fibre-reactive dyestuff of formula (I) is in its salt-form, the cation associated with the sulpho-groups is not critical and may be any of those non-chromophoric cations conventional in the field of fibre-reactive dyestuffs provided that the corresponding salt is substantially water soluble. Examples of such cations are alkali metal cations, for example potassium or sodium ions and ammonium cations, e.g. mono-, di-, tri- and tetra-methyl or mono-, di-, tri- and tetra-ethyl ammonium cations. The cations may be the same or different, i.e. the compounds may be in mixed salt-form.
A fibre-reactive dyestuff of formula (I) displays good compatibility with other known dyestuffs. Accordingly, it may be mixed with other dyestuffs to form a composition which can be used to dye or print suitable substrates. Said other dyestuffs must be compatible with a compound of formula (I), that is, they must have similar dyeing or printing properties, for example fastness properties.
Accordingly, the invention provides in another of its aspects a dyeing or printing composition comprising a fibre-reactive dyestuff of the formula (I).
In a preferred dyeing or printing composition a fibre-reactive dyestuff of formula (I) is combined with certain blue dyestuffs selected from suitable phthalocyanine dyestuffs. In particular, there is contemplated a composition comprising a fibre-reactive dyestuff of the formula (I) and a copper phthalocyanine, more particularly C.I. reactiv Blue 207.
Printing compositions comprising a fibre-reactive dyestuff and a copper phthalocyanine have heretofore suffered from the effect known in the art as catalytic fading, whereby the copper phthalocyanine catalyses the selective fading of the hue of the fibre-reactive dyestuff. This has the unfortunate effect that any substrate coloured by such a composition exhibits a progressive and rapid loss of the hue of the printing composition in favour of the blue colouration of the copper phthalocyanine when exposed to light. A printing composition comprising a fibre-reactive dyestuff of the formula (I) and a copper phthalocyanine displays a marked decrease in this tendency to fade.
A dyeing or printing composition according to the invention preferably contains a fibre-reactive dyestuff of formula (I) and a copper phthalocyanine in a ratio of 2:1 by weight. The remaining mass of the printing composition consists of water such that in 100 parts by weight of the dyeing or printing composition there are N parts of dyestuffs and 100 -N parts of water.
In another aspect of the invention there is provided a process of forming a fibre-reactive dyestuff of formula (I) or a salt thereof comprising the step of reacting a compound of the formula (I) ##STR3## with a triazine (III) ##STR4##
The process is preferably carried out in an aqueous medium at a temperature of from 3 to 40.degree. C., more preferably 5 to 10.degree. C. and at a pH of between 4 to 10, more preferably 6 to 8.
A fibre-reactive dyestuff of formula (I) may be isolated in accordance with known methods, for example by salting out, filtering and drying optionally in vacuum and at slightly elevated temperature.
Depending on the reaction and/or isolation conditions, a fibre-reactive dyestuff of the formula (I) may be obtained in free-acid or salt-form or mixed salt-form, containing, for example one or more of the above-mentioned cations. A fibre-reactive dyestuff of formula (I) may be converted from salt-form or mixed salt-form to free-acid form or vice versa using conventional techniques.
The compounds (II) and (III) are derivable by well known syntheses from commonplace starting materials well known to persons skilled in the art and need no further discussion here.
A fibre-reactive dyes
REFERENCES:
patent: 3926944 (1975-12-01), Berrie et al.
patent: 4001205 (1977-01-01), Beuhler et al.
patent: 4191687 (1980-03-01), Austin
patent: 4261889 (1981-04-01), Seiler et al.
patent: 5163971 (1992-11-01), Stawitz et al.
Doswald Paul
Wald Roland
Clariant Finance (BV) Limited
Einsmann Margaret
Hanf Scott E.
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