Improvements in the Production of Dye-stuffs on Fibre.
Year: 1896

page_text: Date of Application, 28th Dec., 1896
Complete Specification Left, 25th Sept, 1897-Accepted, 30th Oct., 1897
TAKBEN ABRIKEN,
of Elberfeld, Germany.]
FRIEDRICH DAYER
Improvements in the Production of Dye-stuffs on Fibre.
I PHILIP ARTHUR NEWTON of The Office for Patents, 6 Bream's Buildings, Chancery
Lane, in the County of London, Patent Agent, do hereby declare the nature of this
invention to be as follows:-
Some time since my foreign correspondents described a process for the production
of brilliant alizarine blue dye-stuffs on fibre, which process consists in printing padded
fabrics with mixtures prepared from the oxindophenol thio sulphonic acids, from
chrome salts, and from weak alkaline salts, such as sodium thio-sulphate, sodium
acetate, and the like, and in subsequently developing the dye stuffs by steaming the
treated fabrics. The said oxindophenol sulphonic acids, on standing for a time
together with substances of alkaline properties, even at ordinary temperature, change
into the dye-stuffs; therefore a printing paste prepared in the above defined manner
cannot be used for purposes requiring a printing paste which will remain unaltered
for a long time.
My foreign correspondents have now succeeded in rendering their process. useful
for preparing the printing paste without the addition of the said weak alkaline
salts, and allowing these to act on the said oxindophenol thio sulphonic acids
on-fibre.
In carrying out this process, they work, for instance, in the following manner (the
parts are by weight) :-
Cotton cloth is padded with
and then is dried.
EXAMPLE.
from 5 to 10 por cont sodium this sulphate solution,
The treated cloth is printed with a paste prepared from 70 parts of a 30 per cent.
paste of the intermediate product obtained from paramido-dimethyl aniline thio-
sulphonic acid, and alpha, beta, naphtho-quinone beta, sulphonic acid, 769 parts of
starch-tragacanth-thickening, 56 parts of chromo acetate (20 degrees Beaumé), and
105 parts of water.
The cloth is then steamed for about one hour without pressure, malted; and soaped,
in the usual manner.
The particulars given in the above example may be varied within wide limits; for
instance, the cloth may be printed first with the dye-stuff paste defined in the example,
and then may. be printed or padded with thio-sulphate. Likewise, the sodium thio-
sulphate may be replaced by other thio sulphates, or by sodium acetate, or by other
salts of weak alkaline properties, or analogous intermediate products may be used;
instead of that used in the above example. By such and the like variations, the
nature of this invention is not altered, which consists in producing brilliant alízarine
and then is dried.
The treated cloth is printed with a paste prepared from 70 parts of a 30 per cent.
paste of the intermediate product obtained from paramido-dimethyl aniline thio-
sulphonic acid, and alpha, beta, naphtho-quinone beta, sulphonic acid, 769 parts of
starch-tragacanth-thickening, 56 parts of chromo acetate (20 degrees Beaumé), and
105 parts of water.
The cloth is then steamed for about one hour without pressure, malted, and soaped,
in the usual manner.
The particulars given in the above example may be varied within wide limits; for
instance, the cloth may be printed first with the dye-stuff paste defined in the example,
and then may. be printed or padded with thio-sulphate. Likewise, the sodium thio-
sulphate may be replaced by other thio sulphates, or by sodium acetate, or by other
salts of weak alkaline properties, or analogous intermediate products may be used,
instead of that used in the above example. By such and the, like variations, the
nature of this invention is not altered, which consists in producing brilliant alizarine

page_text: blue dye-stuffs on fibre from oxindophenol thio-sulphonic acids, by means of thio
sulphates, or the like salts, allowing these substances to act on one another on
fibre.
NEWTON & SON,
Agents for the Applicant,
Improvements in the Production of Dye-stuffs on Fibre.
I, PHILLIP ARTHUR NEWTON of The Office for Patents, 6 Bream's Buildings,
Chancery Lane in the County of London, Patent Agent, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
In the Specification of Letters Patent 17591, my foreign correspondents described
a process for producing, on fibre, the chrome lakes of brilliant alizarine blue dye-
stuffs, which process consists in printing, on calico or the like fabrics, not the brilliant
alizarine blues themselves, but mixtures prepared from oxyindophenol thiosulphonic
acids, from chrome salts, & from salts possessing alkaline properties, such as sodium
thiosulphate, sodium acetate, and the like, and in subsequently steaming the
printed fabrics, in order to convert the intermediate products printed on the fibre,
into the chrome lakes of the corresponding thiazinic dye-stuffs.
The said oxyindophenolthiosulphonic acids, when mixed with substances having
alkaline properties, if left standing for sometime, even at ordinary temperatures,
change their nature, so that a printing paste prepared in the above defined manner
will not keep good for any length of time:
My foreign correspondents have now succeeded in rendering their process useful
for such purposes. To this end, they prepare the printing paste without the addition
of the said weak alkaline salts, and they allow the latter to act on the said
oxyindophenol thiosulphonic acids at precisely the same time as on the fibre. In
carrying out this process, they proceed, for instance, in the following manner (the
parts are by weight).
Cotton cloth is padded with a from 5 to 10 per cent. sodium thio-sulphate solution,
and then is dried.
The treated cloth is printed with a paste prepared from 70 parts of a 30 per cent.
paste of the intermediate product obtained from paramido-dimethylaniline
thiosulphonic acid and alpha,-beta,-naphthoquinone-beta, sulphonic acid, 769 parts.
of starch tragacanth thickening, 56 parts of chrome acetate (20 degrees Baumé), and
105 parts of water.
The cloth is then steamed for about one hour without pressure,, malted, and soaped
in the usual manner.
The particulars given in the above example may be varied within wide limits; for
instance, the cloth may be printed first with the dyestuff paste defined in the
example, and then may be printed or padded with thiosulphate. Likewise, the
sodium thiosulphate may be replaced by other thiosulphates, or by sodium acetate, or
by other salts of weak alkaline properties, or analogous intermediate products may be
used instead of that used in the above example. By such and similar variations, the
nature of this invention is not altered,

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, (as communicated to
me from abroad), I declare that what I claim is:-
The process for producing, on fibre, the chrome lakes of the thiazinic dye-stuffs,,
known as thrilliant alizarine blues,' which process consists in printing or padding
on calico or the like fabrics, not the brilliant alizarine blues themselves, but either
(a) First with a mixture of the oxyindophenolthiosulphonic acids with chrome
salts, and secondly, salts possessing alkaline properties;; or,
(b) first with the salts possessing alkaline properties, and secondly, the mixture
prepared from oxyindophenolthiosulphonic acids and chrome salts ; and
Finally, steaming the printed or padded material, in order to convert the
intermediate products on the fibre into the chrome lakes of the corresponding
dye-stuffs, in the inauner hereinbefore described, or in any other manner
yielding the same result.
DAL OB 11
1007