DE107731C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 22: dyes, varnishes, lacquers.

Addendum to patent 105349 of August 10, 1898.

Patented in the German Empire on March 1, 1899. Longest duration: August 9, 1913.

In patent specification 105349, the illustration is of very valuable dyes, which are obtained by using Benzidine respectively. Tolidine with a molecule of m-phenylenediamine disulfonic acid to an intermediate product combined and let act on this a Molecül nitro-m-phenylenediamine.

The dyes obtained in this way show all the good properties of the dyes derived from nitro-m-phenylenediamine, brilliantly beautiful nuances, great color strength, and very good fastness to light, acids, and chlorine. They are of far better solubility than the dyes of patents 80973 and 83534, made from benzidine disulfonic acid (Pyraminorange R). However, their nuances are more yellow or greener than that of the latter, so that the need for "easily soluble orange-colored dyes of the shade of pyramino-orange R, which has already conquered an extensive market," persisted. It has now been shown that the desired goal is achieved if, instead of the intermediate bodies used in the process of patent 105349, one molecule of p-diamine and one molecule of m-phenylenediamine disulfonic acid, the intermediate product described in patent 41095 made of a molecule of benzidine and a Molecül ßj-NaphtyIamin-ß ₂ ß ₃ -disulfosä'ure (amido-R-acid) or the corresponding by means of ß ₁ -naphthylamine-ß ₂ ß ^ -disulfonic acid (amido-F-disulfonic acid) used intermediate product and this with a Molecül Nitro-m-diamine combined.

All the good properties that apparently always appear in an azo dye found when he found the nitro-m-phenylenediamine, recognized as extremely valuable, as a component contains, also distinguish the new products, namely: liveliness and beauty the nuance, great color strength and productivity, as well as authenticity in all in question coming agents. In addition, the newly presented dyes have nuances, which differ only insignificantly from that of the Pyraminorange R, and they have it same good solubility as the dyes of patent 105349. This result was in none Wise to foresee: one would have to consider the nuance according to the present experience a reddening that goes far beyond the desired goal should be expected, and on top of that is very noteworthy]! that in spite of the easy solubility achieved there was no decrease in Related to affinity for fiber has taken place.

Example.

The intermediate product prepared from 92 parts of benzidine by the process described in patent specification 41095 from a molecule of benzidine and a molecule of ß-naphthylamine disulfonic acid R (ß _x -naphthylamine-ß ₂ ß ₃ -

disulfosä'ure) is angeschlemmt after filtration and pressing off with a little water and entered into a 45 to 50 ⁰ C. torrid solution of about 80 parts nitro-m-phenylenediamine in about 30 1 of water. The mixture is heated ¹ now with stirring for 4 hours at 50 ⁰ C, then C. When the color of the mixture became pale brownish-red gradually to 90 °, made alkaline with sodium carbonate and the dye is salted out by sodium chloride solution, filtered, and abgeprefst. The same produces a vivid red orange on cotton.

The other dyes are obtained in the same way if instead of the intermediate product used in the above example from a molecule of benzidine and a molecule of β-naphthylamine disulfonic acid R, the corresponding intermediate product of β-naphthylamine-βj, β ₄ -disulfonic acid (F) is used, or if the nitro-m-phenylenediamine used as the second component is replaced by nitro-m-tolylenediamine.

The properties of the combinations thus obtained are shown in the table below Overview:

+ ι Molecule nitro-m-phenylenediamine On addition
from
hydrochloric acid On addition
of little
Caustic soda + ι Molecule nitro-m-toluenediamine On addition
from
hydrochloric acid On addition
of little
Caustic soda Benzidine +
ι Molecule
3 _r naphthylamine
ß ₂ ß ₃ - disulfo-
acid Color of
water
solution reddish
tan
precipitation orange-red
with partly
precipitation Color of
water
solution reddish
tan
precipitation orange-red
with partly
precipitation Benzidine +
ι Molecule
S ^ aphtylamin-
ß ₂ ß ₄ -disulfo-
acid orange-red Completely
tan
precipitation yellow-orange
without precipitation orange-red theihveise
yellow-brown
precipitation orange
without precipitation. orange orange

Claims (1)

Patent Claims: Process for the preparation of orange substantive cotton dyes, consisting in that, instead of the intermediate body used in patent 105349, a molecule of benzidine or. Tolidine and a Molecül in - Phenylenediaminedisulfonic acid here the intermediate body described in the patent 41095 from a Molecül benzidine and a Molecül ßj-Naphtylamih-ßg ß ₃ - disulfonic acid respectively. the corresponding intermediate product from β, -naphthylamine-β ₂ ß ₄ -disulfonic acid is used and the same is combined with nitro-m-diamines in accordance with the process protected by claim 1 of patent 105349. The special embodiments of the process protected by claim 1, consisting in the fact that nitro-m-phenylenediamine or nitro-mtoluylenediamine is used as the nitro-m-diamine.