The Manufacture or Production of Azo Colours on Fibre
Year: 1894

page_text: Date of Application, 28th Dec., 1894
Complete Specification Left, 27th Sept, 1895-Accepted, 2nd Nov., 1895
PROVISIONAL SPECIFICATION
[Communicated from abroad by THE FARBENFABRIKEN vormals FRIEDRICH
BAYER & Co., of Elberfeld Germany ]
The Manufacture or Production of Azo Colours on Fibre
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.-
-
It is known that the production of insoluble azo colours on fibre by printing
certain diazo compounds on textile fabrics treated with betanaphthol, has, for some
time past, attamed great importance. Thus, red shades are obtained by means of
the diazo product of paranıtraniline, claret-ied shades result with the aid of
diazotised alphanaphthyl-amine, and blue shades can be obtained by means of the
detiazo compound of diantsidine. Hitherto, however, it was not possible to
produce black shades on fibre in the manuel hereinbefore defined, although such a
process, if practicable, would constitute a considerable techmeal progress.
My foreign correspondents have succeeded in discovering such a process, as they
have found that intense and very fast shades, varying chiefly from reddish-black to
bluish-black and pae black, can be produced on fibre by printing the tetrazo
derivatives of diamidonzo compounds on fibres or textures treated with beta
naphthol, the sodium salt, or any other salt thereof.
According to the researches of my foreign correspondents, good results aro
obtained on using the teti azo-compounds of paramidobenzene azo alphanaphthyl-
amine, or analogous diamidazo products.
The following example is given, in order to illustrate one method of practically
producing azo colours on fibie in the last mentioned manner. The paits are by
44 parts of betanaphthol are dissolved, by heiting, in 0.083 lities (in case the
parts are kilos. by weight) of soda-lye (22 degrees Baumé) and 300 parts of water.
After adding 100 parts of the ammonium salt of ricmoleic acid, the mass is stirred
into 95 parts of tagacanth mucilage, prepared from 65 parts of tingacanth and
1000 parts of water.-20 parts of sodium acetate, and such a quantity of water are
added, that the whole volume 18 one litre (in case the parts are kilos by weight).
The cotton material is treated in a suitable manner with the resulting liquid
mixture, and subsequently dued. In order to prepare the tetrazo solution, 41 paits
of an 18 per cent paste of paramudobenzeneazoalphanaphthylamine are dissolved in
11 parts of water and 10 parts of munatic acid (22 degrees Baumé). After
adding 21 parts of ice water and 2 parts of muriatic acid, 0029 litres (in case the
parts are kilos. by weight) of a sodium nitrite solution (prepared by dissolving
145 parts of pure sodium nitrite in 1000 parts of water) are allowed to flow slowly
into the muatic solution of paramidobenzeneazoalphanaphthylamine, and the
resulting tetrazo solution is stured into 118 parts of starch tragacanth thickening.
The printing paste so formed is then printed on the cotton material prepared with
betanaphththol in the above mentioned manner. Reddish-black shades, distinguished.
for the great fastness, thus appear on the printed places

page_text: In practically carrying out the process herein before defined, my foreign corre-
spondents do not limit themselves to the directions given in the above example, as
all methods known and m use for analogous or similar purposes, wz, for producing
insoluble azo colours on fibre, can be used with the sanie result
The process, for instance, may be modified in the following manner.
The fibre
o falnic impregnated or printed with beta naphthol, or a salt thereof. is placed in
the tetrazo solution prepared from paramido benzencazoalplanaphthylamine, or
analogous dimido azo products. -Such or similar modifications do not alter the
nature of the present invention, as the latter in general relates to the production of
blackish coloms on fibre by means of the tetrazo derivatives of amidobenzene izo-
alphanaphthylamine, or analogues thereof.
The process can be further modified for the purpose of shading the coloms
produced ou fibie. A more intense black shade, with a less reddish hue, is, for
instance, obtained, if a solution of cupric chloride (40 degrees Baumé) is added to
the pinting paste used in the foregoing example, and a beautiful black with a
blush hue is obtained on mixing the said printing paste with the tetrazo solution
of dando-diphenolether
Black colours fast agamst washing can also be produced on fibre, 11, in place of
paramidobenzenen zoalphanaphthylamine used in the preceding example, diamido-
azonaphthalene, or other diamidonzo products, or derivatives thereof, are employed.
According to the researches of my foreign correspondents, for instance, the
following diamidazo compounds can also be used, a., amido benzeneazoamido-
naphthol, amido benzenenzoamidonaphtholether, amidotolueneazo alphanaphthyl-
amine, amdotoluenenzo amidonaphthol,
amidonaphthaleneazoamidonaphthol, amidonaphthaleneazoamidonaphtholether, or
the like.
amidotolueneazoamidonaphtholether,
Natmally, any foreign correspondents do not limit themselves to the use of the
diamidoazo compounds herembefore enumerated, as generally all diamidonzo
products, and derivatives thereof, can be used in carrying out the above dehued
process
Dated this 28th day of December 1894.
NEWTON & SON,
Agents for the Applicant.
La nuiacture of FroductION OF AZ Curs of IDIO
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 ascertamed m and by the following statement. .—
The production of insoluble azo colours by printing certum diazo compounds on
textile fabrics treated with beta naphthol, has, for some tune past artained great
importance, red shades for example being obtained by means of diazotised
paiantianiline, claret red shades with the aid of dmzoused alphanaphthylamine,
and blue shades by means of the tetrazo derivative of diamusidine. But hitherto
it was not possible to produce black shades on fibres in such manner
My foreign corespondents have however now succeeded in discovering such a
process having found that intense and very fast shades, varying chiefly from teddish-
black to bluish-black and pure black, can be produced by punting on fibres or
textures impregnated with betanaphthol on the sodium salt on any other salt the cof,
the tetrazo-dcivatives of diamido azo compounds contaming the naphthalene radicle.
According to the Icseniches of my foreign correspondents good results are

page_text: obtained on using the tetrazo derivatives of paramido benzene azo alpha naphthyl-
amine o analogous diamidoazo compounds.
The following example is given in order to illustrate one such method of
practically producing azo colours on fibres. The paits are by weight.
44 parts of betanaphthol are dissolved with the aid of heat in 0 083 lities (the
parts being grammes by weight) of soda-lye (22 degrees Bauné) and 300 parts of
water After adding 100 paits of the aminonium salt of 11cinoleic acid, the
mixture is stred into 95 parts of a tragacanth nucilage prepared from 65 parts of
tiagacanth and 1000 parts of water. 20 parts of sodium acetate and such a
quantity of water are then added that the whole volume is one litre (in case the
parts are grainmes by weight). The cotton material is treated in a suitable
manner with the liquid mixture and subsequently dried. In order to prepare the
tetrazo solution 41 parts of an 18 per cent paste of paramido benzenenzo-alpha-
napthylamine are dissolved in 11 parts of water and 10 parts of muriatic acid
(22 degrees Baumé). After adding 21 parts of ice water and 2 parts of muriatic
acid (22 degree, Baumé) 0.029 litres (in case the parts are grammes by weight)
of a sodium nitrite solution containing 145 parts of pure sodium nitrite in
1000 parts of water are allowed to flow slowly into the acid solution of paramido-
benzene azoalphanapthylamme and subsequently the tetrazo solution thus obtained
Is sted into 118 parts of starch tiagacanth thickening. The printing paste thus
formed is then punted on the cotton material prepared with betanaphthol as above
mentioned and the material is subsequently treated in the usual manner. Reddish-
black shades distinguished for their great fastness then appear on the printed
places.
fol
In practically carrying out the process hereinbefore defined, my foreign
correspondents do not limit themselves to the duections given in the above
example, as all known methods in use for analogous or similar purposes viz.
producing insoluble azo colours on fibres can be used with the same effect.
The process for instance may be modified by introducing the fibres or fabric
impregnated or printed with betanaphthol of a salt thereof into the telinzo
solution prepared fiom palamido benzene azo alphanapthylamine or analogous
diamido azo compounds. Such or similar modifications do not alter the nature of
the present invention as the latter generally relates to the production of blackish
colours on fibres by neaus of the tetrazo derivatives of amidobenzene azo alpha-
naphthylamine or analogues thereof.
The process can be further modified for the purpose of shading the colours
produced on fibres. More intense black shades with a less reddish hue are for
instance obtained if a solution of cupric chloride (40 degrees Baume) is added
to the printing paste used in the foregoing example, and a beautiful black with a
bluish hue is obtained on mixing the said printing paste with a solution of the
tetrazo derivative of diamido diphenol ether
Black colours withstanding washing can also be produced on fibres if in place
of the parainidobenzene azoalphanaphthylamine prescribed the preceding
example diamido azo naphthalene or other diamido azo compounds or derivatives
thereof are used. According to the escaiches of my foreign correspondents for
instance the following diamidouzo-compounds can also be used v= amido benzene
azo amidonaphthol, amido benzene azo amidounphtholether, amido toluene azo-
alphanaphthylamine, amidotoluene a70-amidonaphthol, amido toluenenzoamido-
naphtholether, amidonaphthaleneazoamidonaphthol, amidonaphthalene azoamndo-
naphtholether or the like.
Naturally my foreign correspondents do not limit themselves to the use of the
diamido azo compounds hereinbefore enumerated as the diamido azo compounds in

page_text: general containing the naphthalene radicle can be used in cari ying out the above
defined process.
flaving now particularly described and ascertained the nature of the said inven-
Hon and in what manner the saine is to be performed (as communicated to me
from abroad) I declare that what I claim is
1. The production of black azo dyes on fibres by means of the tetrazo derivatives
of diamido azo compounds, containing the naphthalene adicle which process
consists in printing on the fibres or fabuc impregnated or printed with beta-
naphthol or salts thereof, such pinting pastes as are prepared from the tetrazo-
derivatives of the diamido-azo compounds herein before defined, or in unmersing
the fibre or fabic impregnated or printed with beta naphthol or salts thereof,
in solutions containing the tetrazo derivatives of the diamido compounds herein-
before defined, until the formation of the insoluble azo dyes is completed, and
further treating the material thus printed or dyed in the usual manner
2. For producing black azo dyes on fibres by means of the process herembefore
defined, the use of amido benzene azoalphanaphthylamine, amidobenzene azo
amidonaphthol, amidobenzeneazoamidonaphtholether, amidotoluene azoalphanaph-
thy lamine, amidotolueneazoamidonaphthol, amidotolueneazo-amidonaphtholether
diamidoazonaphthalene, amidonaphthalene azoamidonaphthol,, amidonaphthalene-
azonidouaphtholether on the like diamido compounds containing the naphthalene
radicle.
3. As new products of manufacture, fibres or fabrics printed or dyed by means of
the process herembefore defined or in any other manner yielding the same result.
Dated this 19th day of September 1895.
NEWTON & SON,
Agents for the Applicant.