DE145911C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

In the patent 132968, cl. 22 a, the representation of a previously unknown 4-chloro-3-nitroaniline-6-sulfonic acid and an azo dyes suitable for paint production from the diazo compound of this acid and ß- naphthol was protected.

Even the sodium salt of this dye is so sparingly soluble in water that one has to its conversion into lacquers the usual way for the production of "Ponceau lacquers" can not use.

However, it has been shown that it succeeds in the patents 112833 and 120322 specified ways to obtain the desired paints by adding a suspension of the Alkali salts or the ammonia salt of the dye or one of the free dye acid with water-soluble metal salts, metal oxides, metal oxide hydrates or metal carbonates for Bring implementation, of course, mixtures of different metal compounds in Application can be brought. The formation of the colored varnish is expedient, as also 'otherwise usual, in the presence of substrates or with simultaneous production the same.

The color lakes obtained in this way are of a bright yellow-red shade and of almost absolute insolubility even in boiling water, regardless of whether or not Instead of barite salts, lime, zinc or alumina salts are present. In all cases are these varnishes of excellent acid resistance; they don't sublimate that with it produced prints etc. are paintable and of good lightfastness. You are therefore of great value for lithographic printing, for the production of paints and for the production of colored paper and wallpaper.

Example I.

Lacquer for lithographic printing.
2.5 parts of the sodium salt of the / i-chloro-3-mioaniline-6-sulfonic acid-azo-ß-naphthol as a dough are suspended in 100 parts of water and mixed with a solution of 2.5 parts of chlorobarium in 25 parts of water. Steam is introduced, left to boil for a few minutes, then 100 parts of alumina hydrate 3 percent; to and filtered.

Example II.

Varnish for colored papers (Barytlac.k).

An amount of color paste corresponding to 1.87 parts of solid sodium salt is suspended in 75 parts of water. To this are added 1.85 parts of chlorobarium, dissolved in 18.5 parts of water, and boiled with direct steam for a few minutes. The finished alumina hydrate is then added - made up of 10 parts of sulfuric alumina (18 percent. ^ 1Z ₂ O ₃ ), dissolved in 400 parts of water at 80 °, by precipitation with a solution of 5 parts of soda ash. in 50 parts of water at 80 ° - and falls

Claims (1)

then with a solution of 12.5 parts Chlorbarium in 125 parts of water the Blanc fixe out, filtered and pressed. Example III. Varnish for colored papers (lime varnish).
10 parts of sulfuric alumina (18% Al ₂ O ₃ ) are dissolved in 100 parts of water; To this end, 2.5 parts of quicklime are quenched with 25 parts of water. Then 3.74 parts of solid dye are suspended as a dough in 150 parts of water and mixed with the resulting mixture of alumina hydrate and gypsum. It is now boiled for a few minutes with direct steam, filtered and pressed off. Example IV.
Varnish for paints, poster printing U S W. 7.48 parts of dye as a paste are suspended in 300 parts of water; For this if 7.5 parts of chlorobarium are dissolved in 75 parts of water, direct steam is obtained Cook for a few minutes and then add parts of barite, mix well, filter and dry. Pate nt-A ν SPRU c H: Process for the representation of yellow-red, insoluble colored lacquers from the through Combination of diazotized 4-chloro-3-nitroaniline - 6 - sulfonic acid with 8 - naphtol resulting dye, consisting in that either the alkali salts or. the ammonia salt of the same or the free one Color acid in aqueous solution respectively. Suspension in the heat with suspended metal oxides, hydroxides or carbonates or metal salt solutions, or with mixtures of these bodies, also with mixtures that differ from different Discharge metals, treated, with the simultaneous use of various ready-formed metal hydroxides that of aluminum hydroxide is excluded.