IMPROVEMENTS IN THE PREPARATION AND APPLICATION OF ISOLATING COMPOSITIONS FOR THE PROTECTION OF METALLIC SURFACES FROM OXIDATION AND FOR THE PRESERVATION OF WOOD AND OTHER MATERIALS, AND THE PREPARATION OF THE RESIDUE OF VEGETABLE OILS TO BE EMPLOYED FOR SUCH PURPOSES
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by Giacomo Eduardo Marchisio at the
Office of the Commissioners of Patents, with his Petition, on the
21st March 1867.
I, GIACOMO EDUARDO MARUHISIÓ, of Baker Street, Portman Square, in
the County of Middlesex, Doctor of Medicine and Practical Chemist, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN THE
PREPARATION AND APPLICATION OF ISOLATING COMPOSITIONS FOR THE PROTECTION OF
METALLIC SURFACES FROM OXIDATION AND FOR THE PRESERVATION OF WOOD AND
OTHER MATERIALS, AND THE PREPARATION OF THE RESIDUE OF VEGETABLE OILS
TO BE EMPLOYED FOR SUCH PURPOSES," to be as follows:-
This Invention consists in certain improvements in the treatment and
preparation of the acid residue resulting from the purification of cotton seed
oil and other vegetable oils, and in the utilization thereof in various ways.
In order to prepare the residue which remains from the refining and puri-
fication of cotton seed oil and other vegetable oils for the purposes of this
Invention the same is boiled and the acid contained therein neutralised by the
addition of alkali (such as caustic soda), litharge being employed as a
desiccating agent. By these means products are obtained which are applicable
to all purposes for which linseed drying oil is now employed in the arts and
manufactures.
In order to form varnishes, cements, and hydraulic "mastics of an anti-
corrosive and isolating character the products obtained as before mentioned
are combined with various hydrocarbon substances, such as petroleum, spirits

page_text: of turpentine, sulphide of carbon, carbolic acid, creosote, solid paraffin, wax,
resin, shellac, gutta percha, and caoutchouc, according to the purposes for
which the composition is to be employed. Mineral colours of any suitable
nature may also be combined with the compositions. The compositions to be
thus made are applicable to the isolation and protection of metallic surfaces so
as to preserve them from rust and oxidation, and also to the preservation and
protection of wood, ropes, and other materials exposed to the influences of the
atmosphere or to the action of water, whether salt or fresh.
An important use of the isolating "mastic" made in accordance with this
Invention consists in applying it to the surface of the hulls of ships, and to the
plates of iron vessels, so as to preserve them from the destructive action of the
sea, and of the galvanic action which is sometimes set up by contact between
the metal and the salt water. The "mastic" may be simply applied to the
surface of the ship, which may then be submerged in the water; but it is manifest
that such a coating would not retain its durability for any long period, as it
would necessarily be subject to a variety of circumstances and accidents which
would destroy its isolating and protecting character. In order therefore that
the full benefit of the isolating and protecting properties of the "mastic" may
be obtained it should after being laid on the hall of the ship be covered by
a copper sheathing, the same being fastened to the iron by means of copper
rivets, which rivets should be previously coated with lead.