Bleaching and dyeing; fluid treatment and chemical modification – Dye or potential dye composition – additive – treatment,... – Mixed dyes – noncomplexed
Patent
1998-11-13
2000-02-15
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Dye or potential dye composition, additive, treatment,...
Mixed dyes, noncomplexed
8638, 8685, 8686, C09B 4500, C09B 6700
Patent
active
060247711
DESCRIPTION:
BRIEF SUMMARY
This invention relates to mixtures of 2:1 aluminium complexes, a method for producing the same and their use as dyestuffs.
The invention provides in one of its aspects mixtures of aluminium salts having the formula ##STR2## wherein R.sub.3 is methoxypropyl and R.sub.5 is 2,5-dimethoxy phenyl or 2-methoxy phenyl and the sulphonamide groups are in the 5-position; or ##STR3## wherein R.sub.6 is a residue according to the formula ##STR4## or hydrogen wherein the methylsulphonamido group is in the 4-position; or ##STR5## wherein R.sub.8 is 2-methoxyphenyl or a group --(CH.sub.2)--CH(R.sub.9)--(CH.sub.2).sub.3 CH.sub.3 wherein R.sub.9 is an ethyl group and the methylsulphonamido group is in the 5-position.
The mixtures of aluminium salts according to the invention are obtained as a statistical mixture of asymmetric and symmetric 1:2 aluminium complexes. It is a characteristic of this invention that the reaction products formed are not separated into their component parts.
It is to be understood that the mixtures according to the invention are mixtures of compounds having the formula (Ia), (Ib) or (Ic); it is not intended that mixtures includes admixture of aluminium salts (Ia) and (Ib), or (Ib) with (Ic) or (Ia) with (Ic).
The mixtures of aluminium salts may be formed by the metallisation of the following azoic ligands. ##STR6##
The azoic ligands are preferably formed in-situ and are formed by a coupling reaction of a diazonium salt and a suitable coupling component according to conventional syntheses. As precursors to the diazonium salts one can mention 2-amino-4-(3'-methoxypropylamino-sulphonyl) phenol or 2-amino-4-(3'-methylamino-sulphonyl) phenol and as coupling components, appropriate 1,3 diketones and resorcinol.
The reactions are preferably carried out in a finely divided aqueous suspension or in solution with organic solvents, for example alcohols, ketones or acid amides, e.g. DMF or formamide or their mixtures with water. The reaction may be carried out at ambient temperature, although the temperature is preferably from 40 to 70.degree. C., more preferably 60 to 70.degree. C. Reaction is effected under alkaline conditions, preferably at a pH of 9 to 9.5. The pH can be controlled over the course of the reaction with the use of buffers or neutralizing substances.
Metallisation is effected using an aluminium donating substance, preferably aluminium sulphate under conventional conditions.
Under preferred reaction conditions, the azoic ligands (a.sub.1) and (a.sub.2) react in 1:1 admixture; (b.sub.1) and (b.sub.2) react in 8:2 admixture; and (c.sub.1) and (c.sub.2) react in 1:1 admixture.
The reaction products are insoluble in water but are readily soluble in organic solvents, for example, alcohols which makes them eminently suitable for dyeing (especially for dyeing in the mass) of plastics material including solvent-free and solvent containing plastics masses and solvent-free or solvent containing plastic resins. For example, in finishes based on oil or water based paints, wood stains, in various lacquers, in spin dyeing of viscose of cellulose acetate, for dyeing of natural or synthetic polyamides, polyester, polyethylene, polystyrene, polyvinylchloride, rubber and synthetic leather. The reaction products can be used for printing of graphic material, for dyeing of paper masses, for coating of textile and leather or for printing uses.
In particular, the reaction products can be used in an ecologically beneficial way to print, for example, aluminium foils used for packaging. This enables the aluminium to be recycled easily, reducing waste that results from recycling and reducing the amount of harmful products.
Dyeings with the reaction products have good properties generally, for example, good heat stability properties, good light and weathering properties, good chemical resistance, good migration properties, low blooming, good overcoating properties, good fastness in solvent properties, good dyeing strength and good application properties, e.g., flocculation fastness.
Dyeing, printing and padding can be ca
Kaul Bansi Lal
Pflieger Dominique
Clariant Finance (BVI) Limited
Einsmann Margaret
Hanf Scott E.
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