A Process for the Production of Fast Azo Colours upon the Fibre.
Year: 1894

page_text: Date of Application, 30th July, 1894
Complete Specification Left, 30th Apr., 1895-Accepted, 30th July, 1895
[Communicated from abroad by The Farbwerke, vormals MEISTER LUCIUS
AND BRUNING, of Hoechst a/ Main, in the Empire of Germany, Chemical
Manufacturers.]
A Process for the Production of Fast Azo Colours upon the Fibre.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention to be as follows:-
My foreign correspondents have discovered that the simultaneous addition of
copper salts produces a particularly favourable effect, not only with dianisidine
or diphenetidine, as previously demonstrated, but also with other diazo compounds,
which can be coupled with B-naphthol upon the fibre, especially by rendering
the dye more fast. They have also discovered that a beautiful dark and particularly
fast black can be obtained by causing the diazo or tetrazo compound of aniline or
of a toluidine or xylidine or their nitro derivatives or a phenylene or toluylen-
diamine or the diazo or tetrazo compound of amidodiphenylamine, benzidine,
toluidine, amido azo benzol or toluol or of a naphthylamine as a mixture with the
tetrazo compound of dianisidine or diphenetidine in the presence of copper salts
and Turkey red oil or appropriate sebacic acid compounds to act on ẞ naphthol
sodium upon the fibre. It is thus for the first time possible to develope a
useful black upon the fibre, this solving the important problem to obtain a black
upon the fibre which can be easily combined with the other azo colours for poly
colored prints and well resisted by means of tin salt resist colours.
If the addition of a sebacic acid compound is omitted when developing the
colour, a black is obtained but of inferior beauty and fastness. The process can
also be so carried out that mixtures of the diazo compounds of several of the
above mentioned bases are used instead of diazo compound of only one of
these bases mixed with the tetrazo compound of dianisidine or diphenetidine
respectively.
Dated this 30th day of July 1894.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A Process for the Production of Fast Azo Colours upon the Fibre.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered 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:―
My foreign correspondents have discovered that the simultaneous addition of
copper salts produces a particularly favourable effect, not only with dianisidine or
diphenetidine, as previously demonstrated, but also with other diazo compounds,
which can be coupled with ẞ-naphthol upon the fibre, especially by rendering
the dye more fast.

page_text: They have also discovered that a beautiful dark and particularly fast black
can be obtained by causing the diazo or tetrazo compound of aniline or of a
toluidine or xylidine or their nitro derivatives, or a phenylene- or toluylen-
diamine or the diazo or tetrazo compound of amido-diphenylamine, benzidine,
tolidine, amido azo benzol or toluol, or of a naphthylamine as a mixture with
the tetrazo compound of dianisidine or diphenetidine, in the presence of copper
salts and Turkey red oil or appropriate fatty acid compounds, to act on ẞ-naphthol
sodium upon the fibre. It is thus for the first time possible to develope a useful
black upon the fibre, thus solving the important problem to obtain a black upon
the fibre which which can be easily combined with the other azo colours for
poly-coloured prints, and well resisted by means of tin salt resist-colours.
If the addition of a fatty acid compound is omitted when developing the
colour, a black is obtained but of inferior beauty and fastness.
The process can also be so carried out that mixtures of the diazo compounds
of several of the above mentioned bases are used instead of the diazo compound
of only one of these bases, mixed with the tetrazo compound of dianisidine or
diphenetidine respectively.
The following is an example shewing how the process according to this invention
can be carried out.
The fabric is impregnated in the usual manner with the naphthol sodium
solution, is dried, and then printed with the diazo colour, dried, washed, and
soaped.
DIAZO SOLUTION.
Hydrochlorate of dianisidine
99
39
amidoazo-benzol
Hydrochloric acid 22° Bé.
Cold water
Ice
-
-
Nitrite solution
290
32 grammes.
12
"
25 cubic centimetres.
-
-
-
250
"
"
-
100 grammes.
-
70 cubic centimetres.
diluted to 500 cubic centimetres after diazotising.
Instead of hydrochlorate of amido azo benzol (12 grammes) there may be
used equivalent amounts of the above mentioned bases.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The production of fast azo colours on the fibre by causing the diazo or tetrazo
compound of aniline or of tolidine or xylidine or their nitro derivatives, or a
phenylen- or toluylen-diamine, or the diazo or tetrazo compound of amido diphenyl-

page_text: amine, benzidine, tolidine, amido azo benzol or toluol, or of a naphthylamine or a
combination of two or more of the above when mixed with the tetrazo compound
of dianisidine or diphenetidine, to act on 3 naphthol-sodium upon the fibre in the
presence of copper salts and of Turkey red oil or other suitable fatty acid.
compounds, substantially as described.
Dated this 30th day of April 1895.
ABEL & IMRAY,
Agents for the Applicant.