Manufacture of New Substantive Dye-stuffs.
Year: 1895

page_text: Date of Application, 13th Apr., 1895
Complete Specification Left, 11th Jan., 1896-Accepted, 15th Feb., 1896
PROVISIONAL SPECIFICATION.
Communicated from abroad by THE FARBWERKE, vormals MEISTER LUCIUS &
BRUNING, of Hoechst a/ Main, in the Empire of Germany, Chemical
Manufacturers.]
Manufacture of New Substantive Dye-stuffs.
1, 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 1. 4. 6 and 1.4.7 a-naphthol-
disulphonic acids described in the Provisional Specification No. 14134 of 1894
are of great technical value for the manufacture of substantive dyestuffs when
they are combined in a particular manner with the diazo compounds of diamines
such as benzidine, tolidine, dianisidiue, diphenetidine, etc. This does not refer to
the dyestuffs obtained by the action of 2 molecular proportions of the acids in
question upon 1 molecular proportion of the tetrazo compounds mentioned above
since they are not well suited for dyeing cotton, owing to their too great
solubility but it refers to those dyestuffs which result from the combination of one
molecular proportion of the acids above mentioned with one molecular proportion
of those tetrazocompounds, and from the further combination of the intermediate
products thus obtained with a molecular proportion of a phenol or of an amine or
their sulpho-derivatives.
Of the latter substances we mention the following as being particularly
suitable.
Dioxynaphthaline 2. 7, resorcine
a and ẞnaphthoic acids
a and naphthylamine
Toluylendiamine
Naphthionic acid, naphthylamiusulphonic acid (2. 6)
Naphtholsulphonic acid (1. 4)
Naphtholdisulphonic acid R (2. 3. 6.)
Amidonaphtholdisulphonic acid H (1. 8. 3. 6)
Amidonaphtholsulphonic acid G (2. 8. 6)
Amidonaphtholdisulphonic acid 2 R. (2. 8. 3. 6)
Naphtholtrisulphonic acid 2 R (2. 3. 6. 8)
Dioxynaphthalenesulphonic acid G (2. 8. 6)
Dioxynaphthalenesulphonic acid (1.`7. 4)
Naphtholsulphonic acid F. (2. 7)
Dioxynaphthalenesulphonic acid S (1. 8. 4).
The colour of the dyestuffs varies according to the choice of the second molecule
from a reddish blue to an extremely greenish-blue.
EXAMPLE. 1.
10.6 kilos. of tolidine are diazotised in the usual manner and are run, at a
temperature of 0° C. into a solution of 18 kilos of 1. 4. 7 naphtholdisulphonate of
11
.1

page_text: product begins at once and is completed in about 12 hours. A solution of
13.5 kilos. of 1. 4 naphtholsulphonate of soda is then added and the whole is allowed
to stand for 24 hours. The product is then heated to boiling point and the
dyestuff is precipitated with salt. It dyes uomordanted cotton a reddish blue.
EXAMPLE 2.
12.2 kilos. of dianisidine are diazotised in the usual way and then run into a
solution of 18 kilos. of 1. 4. 7 naphtholdisulphonate of soda. After 12 hours,
12.5 kilos. of amidonaphthol sulphonate of soda G are added and the mixture is
allowed to stand for some hours then heated, and the dyestuff is precipitated with
salt.
This dyestuff dyes unmordanted cotton a blackish-blue, it can be diazotised in the
fibre and developed with toluylendiamine or m. phenylenediamine. By substituting
amidonaphtholsulphonic acid H for amidonaphthol sulphonic acid G a pure greenish-
blue is obtained. The manufacture of the corresponding dyestuffs of the 1. 4. 6
naphtholdisulphonic acid is effected in exactly the same way as the above described.
dyes of the 1. 4. 7 acid.
The dyestuffs obtained from the 1. 4. 6 acid have as a rule a duller shade.
Dad hi 102 3
ABEL & IMRAY,
Agents for the Applicant.
MI EIN
Manufacture of New Substantive Dye-stuffs.
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 1. 4. 6 and 1. 4. 7 a-naphthol-
disulphonic acids described in the Provisional Specification No. 14134 of 1894
are of great technical value for the manufacture of substantive dyestuffs when
they are combined in a particular manner with the diazo compounds of diamines
such as benzidine, tolidine, dianisidine, diphenetidine etc. This does not refer to
the dyestuffs obtained by the action of 2 molecular proportions of the acids in
question upon 1 molecular proportion of the tetrazo compounds mentioned above-
since they are not well suited for dyeing cotton, owing to their too great solubility
-but it refers to those dyestuff's which result from the combination of one
molecular proportion of the acids above mentioned with one molecular proportion
of those tetrazocompounds, and from the further combination of the intermediate
products thus obtained with a molecular proportion of a phenol or of an amine or
their sulpho derivatives.
Of the latter substances we mention the following as being particularly

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what mauner the same is to be performed, I declare that what I
claim is :-
1. The herein described manufacture of new substantive dyestuffs, by combining
tetrazo compounds of diamines such as benzidine, tolidine, dianisidine and
diphenetidine with the naphtholdisulphonic acids 1. 4. 6 and 1. 4. 7 to form inter-
mediate products, which are caused to react upon phenols or amines or their
sulphonic acids.
2. The substantive dyestuffs manufactured substantially as set forth in the
preceding claim.
Dated this 11th day of January 1896
ABEL & IMRAY,
Agents for the Applicant.