DE708834C - Improvement of pigment dyes - Google Patents

Description

Improvement of pigment dyes It is known the degree of distribution to improve pigment dyes by dispersing them in the presence active substances or ready-made pigment dyes with aqueous solutions such substances treated.

It has now been found that the degree of distribution and the dyeing Properties of pigment dyes. can still be improved significantly if one aqueous suspensions of finely divided pigment dyes in the presence of capillary-active ones Converts substances into foam and dries this foam. The dry obtained in this way Dyestuff foams can easily be produced by simply powdering or pounding in technical processable form.

Both inorganic pigments are suitable for foam treatment as well as organic pigments, e.g. B. insoluble azo dyes, phthalocyanines, anthraquinone dyes, as well as the color lakes of these series, or the complex ones, phosphorus, tungsten and / or molybdenum-containing compounds of basic fax materials. They are used in generally in the commercially available, finely divided form in which you can carry them through the various known milling processes obtained.

The well-known capillary-active ones are used as foaming agents Substances in: Consideration, e.g. B. the alkali salts of higher fatty acids and resin acids, the alkylolamine salts of acids, alkali salts of sulfuric acid monofatty alcohol esters, of sulfonated mineral oils, of alkylnaphthalenesulfonic acids, of the condensation product , from ß-naphthalenesulfonic acid with formaldehyde and from sauna phosphoric acid aryl esters, Fatty acid alkyl taurides, as well as those produced by the action of a large number of moles of one Alkylene oxide, oxalkyl ethers available on fatty alcohols or phenols, sulphite cellulose waste liquor, as well as quaternary ammonium compounds with long aliphatic chains, e.g. D @ odecyldimethylb @ enzylammonium chloride, as the compounds of the terpene series known as foaming agents, e.g. B. Terpineol and Pine oil.

The foams can be produced by injecting air or carbon dioxide -aäer. Nitrogen in the suspension, for example '.' through a filter candle, or also by hefti- '. done stirring the dye suspension. The one produced in this way If necessary, foam is removed from any remaining liquid and dried then expediently by moderate heating.

The obtained by crushing or crushing the dried foam, Pigment @ dyes are characterized by the high softness of the grain. You can can be used for a wide variety of dyeing purposes. For example, this is how you get by processing the pigments with the usual, sub-pen and binder paints, which are characterized by very rhyming hue and good abundance. example A suspension of 50 parts of a chlorinated copper phthalocyanine in zoo Part of water is mixed with 1 part of the sodium salt of the phosphoric acid dicresyl ester vigorously mixed in a highly effective mixer. In the course of half an hour a stable paraffin foam is obtained in this way. One lets stand until Having separated about 600 parts of liquid again separates the foam from the liquid and dries it at 5o to 7o °. The dry foam obtained is powdered. The dyestuff obtained in this way is characterized by great softness in grain the end.

2 'Peile of the dye prepared in this way are with 100 parts Barite rolled out to full color strength. The scrap received is drawn spread with aqueous binders, e.g. B. with animal or vegetable glue, and in non-aqueous paints, such as oil varnishes, by a particularly high one Purity and abundance. Example 2 A suspension of 100 parts of copper phthalocyanine in i 600 to 2,000 parts of water containing small amounts of sodium laurol sulfonic acid, is mixed in the turbo mixer with a little compressed air being fed in. So you get in Run a dense foam for 10 minutes, which is removed and after draining the Water that is still separating dries at 50 to 100 °. That when mashing the Dyestuff powder obtained from the dried foam is characterized by great grain softness and can be used in the manner described in Example i to glue and oil paints are processed.

Example 3 1 part of the disazo dye from 2 moles of 4-tolyl-3-methyl-5-pyrazolone and 1 mole of o-dianisidine are made using 2.5 parts of dimethylbenzyl palm kernel fatty ammonium chloride distributed in i 500 parts of water. The liquid becomes about 1 / ;; Vigorous for an hour stirred. The resulting solid foam is drawn off and after draining the still separating water between 50 and 100 ° dried. By crushing the result is a dyestuff flour which is distinguished by its particularly high color strength. Example q. A slurry of 100 parts of the azo dye from i-amino-2-methoxybenzeneq-sulfodiethylamide and ß-oxynaphthoic acid-2, q-dimethoxy-5-chloroanilide -in 2,000 parts of water with the addition of 2.5 parts of sodium lauralsulfonate to that described in Example 3 Treated wisely. A high quality dyestuff flour is also obtained.

EXAMPLE 5 100 parts of the manganese compound of the azo dye composed of 2-aminonaphthalene-i-sulfonic acid and β-oxynaphthoic acid are treated in the form of its suspension in 1500 parts of water with the addition of 2.5 parts of the agent used in Example 3 to the agent there described way. EXAMPLE 6 A suspension of 100 parts of Prussian blue in 1250 parts of water is treated in the manner described there with the addition of 2.5 parts of the agent used in Example 3. EXAMPLE 7 A slurry of 10 5 100 parts of chromium oxide hydrate green in 100 parts of water with the addition of 2.5 parts of sodium oleate is treated in the manner described in Example 3. A dye flour which is valuable for dyeing is obtained. 110 PATENT CLAIM: A method for improving pigment dyes, characterized in that aqueous dispersions of finely divided pigment dyes 115 comparable in the presence kapillaraktiverStoffe converted into foam, this foam is dried 'and crushed.