DE897990C - Process for the production of tank colors with phthalocyanines - Google Patents

Description

Process for producing vat dyeings with phthalocyanines Phthalocyanines, which do not contain any hydrophilic groups in the molecule give in alkaline suspension with hyposulfites or similarly acting reducing agents sometimes a certain amount Color changes, but do not form a vat solution. So you haven't been able to do this until now can be used to produce vat dyeings.

It has now been found that you can also use phthalocyanines that do not contain hydrophilic groups in the molecule, especially with cobalt phthalocvanins, Can produce vat colorations if you mix them with vat substances, if necessary after prior fine distribution with the aid of dispersants, with alkaline Treated hyposulfite solution and dyed vegetable fibers with the vats obtained.

Suitable linkable compounds which are suitable as additives are for example anthraquinones, if they do not have a coloring character, then Vat dyes such as indigoid and thioindigoid dyes e.g. B. Indigo and Thioindigo, also indanthrone, flavanthrone, dyes of the perylene, dibenzanthrone and isodibenzanthrone series, Dyes from naphthalene z, q., 5, 8-tetracarboxylic acid (cf. German patent specification q.3o 63a), diacyldiamino @ anthraquinones, anthrimides, anthraquinone carbazoles, anthraquinone acridones and thioxanthones or pyranthrones. By type and amount of this self-coloring Additives, the color of the phthalocyanine can be changed within wide limits.

The following can be used as dispersants: gum arabic, starch preparations, such as soluble starch and dextrin, tannin or saponin, also lignin sulfonic acid, Sulfuric acid esters of fatty alcohols, sulfonated fatty acids and fatty acid amides, Sulfonic acids of alkyl, aralkyl or aryl naphthalenes, Addition products from ethylene oxide to mono- or polyhydric alcohols or fatty acids or fatty acid amides, Fatty acid esters of oxyethanesulfonic acid, condensation products from naphthalenesulfonic acids and formaldehyde or salts of nitrilotriacetic acid.

For the preparation of the mixtures, for example, one can proceed as follows: that one -the phthalocyanine together with the viable substance, optionally together with a D.ispergiermittel, from a solvent, e.g. B. concentrated sulfuric acid, redissolved or that the two constituents, optionally in the presence of a dispersant, finely ground or kneaded, for example according to the process of the USA patent i 892 28o or the German patent 7q: 3 398.

The parts mentioned in the following examples are parts by weight. Example i A mixture of i part cobalt phthalocyanine and i part anthraquinone is dissolved in 15 to 20 parts of concentrated sulfuric acid, the solution in ice water poured and the deposited precipitate in the usual way to a dye dough pasted. The dye dough obtained in this way delivers from an olive-green vat on cotton strong, clear blue dyeings of high lightfastness and washfastness.

If one uses i, 5- or i, 4-Dxoxyanthraquinone instead of anthraquinone or 2,6-Dioxyanthraquinone disulfonic acid, similar colorations are obtained. Example 2 A mixture of 100 parts of cobalt phthalocyanine and 1 part is dissolved Indanthrone, as described in Example i, from concentrated sulfuric acid to and receives a dough made from olive green vat cotton in strong and clear colors in blue tones. -Instead of indanthrone one can also with the same success Use a sulphurized indanthrone (cf. German Patent 558 443). example 3 With a known manner from 100 parts of cobalt phthalocyanine and 5 parts of flavanthrone The dye dough produced is obtained from an olive-green vat on cotton with clear green-tinged blue Colorations.

With one made from 100 parts of cobalt phthalocyanine and 50 parts of flavanthrone The dye paste produced gives olive green colorations.

Similar colorations are obtained if one takes the place of flavanthrone 8th; 8'-Dibenzoylaminoi, i'-dianthrimidcarbazole or Algolgelb GC (see Schultz, color tables 7th ed., 1931, vol. I, no. I249) used.

B: Example 4 One made from 100 parts of cobalt phthalocyanine and 2 parts. Monobromoisodi @ benzanthrone. The dyestuff dough produced dyes cotton from the vat in strong, bright colors reddish blue tones.

Example s One solves. a mixture of i part iron phthalocyanine and 2 parts of anthraquinone. concentrated sulfuric acid and gets a coloring paste, that made from olive-brown cotton vat in blue-gray tones with good fastness properties colors. B. Example6 One of 100 parts iron phthalocyanine, 100 parts indanthrone and 100 parts of gum arabic dye paste dyes from an olive-brown vat Cotton in real blue-gray tones. Example ? A mixture of 95 parts of cobalt phthalocyanine and 5 parts of a cobalt phthalocyanine made connectable by the introduction of carboxyl groups is, optionally with the addition of a dispersant, in a known manner brought into fine distribution. The product obtained in this way colors from an olive-green vat Cotton in strong, clear blue tones with very good wash and rub fastness.

The introduction of the carboxyl groups in a cobalt phthalocyanine can z. B. by introducing Phos: gene in a solution of cobalt phthalocyanine in a Aluminum chloride, d-sodium chloride melt at i3'0 to i4o ° @ until it is reached the complete viability of the dissolved cobalt phthalocyanine and subsequent It decomposes with water.

Is used instead of the carboxylated cobalt phthalocyanine slightly sulphurized, but not yet soluble in soda, is obtained very much similar colorations.

Example 8 One made from 90 parts of cobalt phthalocyanine and 10 parts of dibenzanthrone Dye paste prepared in the usual way by dissolving from concentrated sulfuric acid dyes cotton from the vat in strong blue tones that are clearly reddish are as. those with the dye according to Example 7.

If you add dispersants to the mixture before pasting, such as 5o parts of anthraflavic acid (see. German Patent 626 862) or 10 parts of a Condensation product of naphthalene-s-sulfonic acid and formaldehyde (see German Patent 292 531), the dye obtained has an even stronger and more uniform color.

Claims (1)

PATENT CLAIM: Process for producing vat dyeings with phthalocyanines, characterized in that mixtures of metal phthalocyanines, which are not hydrophilic Groups contained in the molecule, and substances that can be linked, if necessary after previous fine distribution with the help of dispersants, with alkaline hyposulfite solution treated and dyed vegetable fibers with the vats obtained.