Improvements in the Manufacture or Production of Colouring Matters.
Year: 1897

page_text: Date of Application, 30th Mar., 1897
Complete Specification Left, 29th Dec., 1897-Accepted, 5th Feb., 1898
[Communicated from
vormals
abroad by THE FARBENFABRIKEN
BAYER & Co., of Elberfeld, Germany.]
FRIEDRICH
Improvements in the Manufacture or Production of Colouring
Matters.
I, HENRY EDWARD NEWTON, of the Office for Patents, 6, Breams Buildings,
Chancery Lane, in the County of London, Patent Agent, do hereby declare the
nature of this invention to be as follows:-
My foreign correspondents have found that colouring matters capable of dyeing
wool, in acid baths, blue shades which are fast against the action of acids & alkalies,
and against the action of light, can be obtained by combining one molecular
proportion of the diazo derivative of a so-called periainidonaphtolsulphonic acid with
one molecular proportion of an alphylised or alkylised 18 naphthylamine sulphonic
acid, such naphthylamine sulphonic acids having the following general formula:-
In this formula, R represents aromatic radicles ("alphyls"), such as phenyl, tclyl
xylyl, or fatty radicles ("alkyls"), such as methyl, ethyl, or the like.
In order to illustrate the new process, my foreign correspondents give the following
example, the parts being by weight :-
EXAMPLE.
31.9 parts of the 1.8 amidonaphthol-3.6-disulpho acid, are diazotised in the usual
manuer by means of 6.9 parts of sodium nitrito. The precipitated diazocompound
is separated by filtration from the acid solution, and the residue remaining on the
filter is changed into a liquid paste by the addition of water. This paste is added
(while stirring) to a solution of 30 parts of 1-phenylamidonaphthalene-8-sulphonic
acid, and of 40 parts of sodium acetate in 1,500 parts of water. The stirring is
continued for about four hours, by which time the formation of the dye-stuff will
probably be finished. The dye-stuff separates during the process as a dark
precipitate with metallic lustre. It is filtered, dried, and pulverised. In a dry
state, it has the appearance of a blue powder which will dye wool in acid baths, blue
shades having the valuable qualities above mentioned.
Similar dyestuffs are obtained if, in place of the 1.8 amidonaphthol-3.6-disulpho
acid, other so-called periamidonaphthol sulphonic acids, such as 1.8-amidonaphthol-

page_text: 4.6-disulpho acid, 1.8-amidonaphthol 2.4 disulpho acid, 1.8 amidonaphthol-3.5-disulpho
acid, 1.8-amidonaphthol-1-sulphonic acid, 1.8-amido naphthol-3-sulphonic acid,
1.8-amidonaphthol-5-sulphonic acid, or the like, be used, or if, instead of the
phenylamidonaphthalene sulphonic acid, other alphylised or alkylised 1.8 amido-
naphthalene sulphonic acids be employed in the above example.
My foreign correspondents do not limit themselves to the particulars given in this
example, which is merely typical and be varied within wide limits.
Dated this 30th day of March 1907
NEWTON & SON,
Agents for the Applicant.
Improvements in the Manufacture or Production of Colouring
Matters.
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 1
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 found that colouring matters capable of dyeing-
wool in acid baths, bluo shades which are fast against the action of acids, of alkalies,
and of light, can be obtained by combining one molecular proportion of the diazo 2
derivative of a so-called periamidonaphtholsulphonic acid with one molecular
proportion of an alphylized or alkylized 1.8 naphthylaminesulphonic acid, such
naphthylaminesulphonic acids having the following general formula:—

page_text: Similar dye-stuffs are obtained if, in place of the 1.8 inidonaphthol-3.6-disulpho
acid, other so-called periamidonaphthol-sulphonic acids, such as 1.8-amidonaphthol-
4.6-disulpho acid, 1.8-amidonaphthol-2.4-disulpho neid, 1.8-amidonaphthol-3.5-
disulpho acid, 1.8-amidonaphthol-4-sulphonic acid, 1.8-anidonaphthol-3-sulphonic
acid, 1.8-amidonaphthol-5-sulphonic acid, or the like, be used; or if, instead of the
phenylamidonaphthalene sulphonic acid, other alphylized or alkylized 1.8-amido-
naphthalene sulphonic acids be employed in the above example.
My foreign correspondents do not limit themselves to the particulars given in this
example, which is merely typical, and can be varied within wide limits.
Having now particularly described and ascertained the nature of the suid inven-
tion and in what manner the same is to be performed (as communicated to me from
abroad), I declare that what I claim is :-
1. The process for producing new monoazo dye-stuffs, which process consists in
combining one molecular proportion of the diazo derivative of a so-called periainido-
naphthol sulphonic acid with one molecular proportion of an alphylized or alkylized
1.8 naphthylaminemono-sulphonic acid, in the manner herein before defined, or in any
other manner yielding the same result.
2. As new articles of manufacture, the new dye-stuffs obtainable according to the
above Claim 1.