The Production of Azo Colouring Matters upon Fibres.
Year: 1894

page_text: Date of Application, 6th Feb., 1894
Complete Specification Left, 6th Nov., 1894-Accepted, 8th Dec., 1894
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE FARBENFABRIKEN, vormals FRIEDRICH
BAYER & Co., of Elberfeld, in the Empire of Germany.]
The Production of Azo Colouring Matters upon Fibres.
I, HENRY EDWARD 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:-
:-
32
The shades known in commerce for some time past as "ice-bordeaux and
"paranitraniline red," are produced by first grounding the fibre or material with
beta naphthol, and subsequently printing on the grounded fibre or material, the
diazo derivatives of alpha-naphthylamine and para-nitraniline respectively. The
shades thus obtained are much appreciated, as they withstand washing perfectly.
The "ice-bordeaux " is a bordeaux with bluish tinge, and the "para-nitraniline
red" is a bright brick red, possessing a strong yellowish hue.
66
Many attempts have been made, but in vain, to produce in a similar manner a
red which, on the one hand, does not possess the typical bordeaux character of the
"ice-bordeaux," and, on the other hand, is bluer and more intense than the
paranitraniline red." The "Ditrophenitidine red," which corresponds to the last-
named "para-nitraniline red," and results from employing the diazo compound of
ortho-nitro-para phenetidine (see the Specification of the English Letters Patent
No. 4407, dated 5th March 1892), has special advantages for the production of
dyes on fibres; but the high cost of the ortho-nitro-para-phenetidine has prevented
the general use of the "nitro-phenetidine red."
:
My foreign correspondents have now found, that the nitro diamines and
substituted nitro diamines are eminently adapted for producing the shades desired.
If, for instance, according to the researches of my foreign correspondents, the
tetrazo compound of mononitro-benzidine (NO, NH, = 1 : 3) is printed on fibres
or tissues, printed, grounded, or impregnated with beta-naphthol, or if the fibres or
textures prepared with beta naphthol in a suitable manner are placed in a solution
of the said tetrazo compound, very intense and strong bluish-red shades result,
which are distinguished for their great fastness against the action of light and
washing, and possess nearly double the strength of the shades produced in a similar
manner with "paranitraniline red."
The fastness of the shades can be increased by employing Turkey red oil and
aluminate of soda, or other suitable mordants.
One of the methods of producing these disazo dyestuffs on fibres, is illustrated
by the following example, the parts being by weight :-
EXAMPLE:
-
11 parts of mononitrobenzidine (NO, NH, =1:3) are carefully mixed
with 7 parts of sodium nitrite and 37 parts of water, and the resulting pasty
mass is mixed with 190 parts of a neutral thickening. The mass so obtained
(when cool) is stirred into a mixture, likewise cooled, and prepared by mixing
30 litres of muriatic acid, 22 degrees Baumé (in case the parts are kilos. by
veight), with 120 parts of water and 250 parts of a neutral thickening. After
dding 35 parts of sodium acetate, the resulting diazo printing colour is printel in

page_text: :
=
corresponding quantities of other nitro diamines, such as orthomononitrobenzidine
(NO, NH, 1 : 2), nitrotolidine, dinitrobenzidine, dinitrotolidine, homologues
or analogues thereof, or substitution derivatives of these or similar nitrodiamido
compounds.
Beautiful red shades, which are very fast against washing, are thus obtained, if
either the tetrazo compounds of these nitro diamines are printed on the fibres or
tissues previously printed, grounded, or impregnated with beta-naphthol, or if the
fibres or tissues prepared with beta-naphthol, in the one or other way, are placed
in solutions of the said tetrazo compounds, or if the combination on fibre is effected
in any other way.
.
Wal-1001
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
The Production of Azo Colouring Matters upon Fibres.
I HENRY EDWARD 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 :-
The shades known in commerce, for some time past, as "ice-bordeaux" and
"para-nitraniline-red," are produced by first grounding the fibre or material with
beta-naphthol, and subsequently printing on the grounded fibre or material, with
the diazo-derivatives of alpha-naphthylamine and para nitraniline respectively.
The shades thus obtained are much appreciated, as they withstand washing
perfectly.
"Ice-bordeaux" is a claret colour with a bluish tinge, and "para-nitraniline
red" is a bright brick-red exhibiting a strong yellowish hue.
66
Many fruitless attempts have been made to produce, in a similar manner, a red
less markedly claret-like than "ice-bordeaux," but bluer and of greater depth than
"para-nitraniline red." The "nitrophenetidine red" corresponding to para
nitraniline red" formed from the diazo compound of ortho-nitro-para-phenetidine
(see the Specification of the English Letters Patent No. 4407, dated 5th March
1892) is in this respect an advance on the nitraniline red, but the high cost of
ortho-nitro-para-phenetidine has prevented the general use of "nitro-phenetidine
My foreign correspondents have now found, that the nitro-diamines, and
substituted nitro-diamines, are eminently adapted for producing the desired shades.
If, for instance, according to the researches of my foreign correspondents, the
tetrazo compound of mononitrobenzidine (NO, NH = 1 : 3), or
red."

page_text: is printed on fibres or tissues printed, grounded, or impregnated with beta-naphthol,
or if the fibres or textures prepared in a suitable manner with beta-naphthol are
placed in a solution of the said tetrazo compound, very intense and strong bluish-
red shades are obtained, distinguished by their great fastness on exposure to the
action of light and washing, and possessing nearly double the depth of the shades
produced in a similar manner by "para-nitraniline red."
The fastness of the shades can be increased by using Turkey-red oil and
aluminate of soda or other suitable mordants.
One of the methods of producing these diazo dye-stuffs on fibres is illustrated
by the following example, the parts being by weight.
EXAMPLE.
:
===
11-5 parts of mononitrobenzidine (NO, NH, = 1 : 3) are carefully mixed
with 7 parts of sodium nitrite and 37 parts of water, and the pasty mass is
mixed with 190 parts of a neutral thickening material. This mixture, having
been thoroughly cooled, is stirred into a cooled mixture prepared by adding
30 litres of muriatic acid of 22 degrees Baumé (in case the parts are kilos. by
weight) to 120 parts of water and 250 parts of a neutral thickening material.
After adding 35 parts of sodium acetate, the diazo colour thus prepared is printed
in a suitable manner on the tissue grounded with beta naphthol. The formation
of the dye takes place immediately. After drying the printed material, it is
soaped, washed, and again dried.
==
-
as
Instead of the mononitrobenzidine used in the above example, the corresponding
quantities of other nitro para diamines, such orthomononitrobenzidine
(NO,:NH, 12), nitrotolidine, or dinitro benzidine, can be used.
Beautiful red shades which withstand washing are thus obtained, if either the
tetrazo compounds of these nitro diamines are printed on the fibres or tissues
previously printed, grounded, or impregnated with beta-naphthol, or if the fibres
or tissues prepared with beta-naphthol in either the one or the other way, are
placed in solutions of the said tetrazo compounds, or if the combination is effected
on the fibre in
any other
way.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
1. The production of colours by combining in or on the fibre, the tetrazo
derivatives of nitro-para diamines with beta naphthol, to form diazo compounds,
with or without Turkey-red oil and aluminate of soda or other suitable mordants.
2. The process for producing diazo dye-stuffs in or on the fibre, which process
consists either in printing tetrazo derivatives of nitro-para-diamines on the fibre or
tissue printed or impregnated with beta naphthol, or in placing fibres or tissues
printed or impregnated with beta naphthol in solutions containing tetrazo
derivatives of nitro-para-diamines.
:
3. The production of a red colour by printing a paste containing the tetraazo
salt of a nitro-para-diamine, such as mononitrobenzidine (NO, NH, = 1 : 3),
mononitrotolidine (NO, NH, = 1 : 3), or the like, on fibres or tissues grounded
with beta-naphthol, and, if desirable, treated with Turkey-red oil and aluminate of
soda, or other suitable mordants, subsequently drying the printed material, soaping,
washing, and again drying the same.
4. The fibres or textures printed or dyed in the manner hereinbefore defined.
Dated this 6th day of Novambar 1201
NEWTON & SON,
Agents for the Applicant.