Improvements in Compositions containing Nitro-cellulose and in Articles treated therewith..
Year: 1897

page_text: Date of Application, 27th July, 1897-Accepted, 4th Sept., 1897
COMPLETE SPECIFICATION.
Improvements in Compositions containing Nitro-cellulose and in
Articles treated therewith..
I, PHILIP MIDDLETON JUSTICE, of 55 and 56 Chancery Lane, London, Fellow
of the Chartered Institute of Patent Agents, do hereby declare the nature of this
invention (which has been communicated to me from abroad by The Marsden
Company, a corporation under the laws of the State of New Jersey, and having an
office in the City of Philadelphia, in the State of Pennsylvania, United States of
America) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to a composition of matter and articles treated therewith,
and it consists substantially in such features of improvement as will be hereinafter
more particularly described.
Broadly considered, the invention consists of a composition of matter comprising
nitro-cellulose and wool-fat or lanolin, while for some particular uses and purposes
other materials are combined with the nitro-cellulose and lanolin, such for instance
as corn-oil, and when desired some coloring matter or other equivalent materials,
the particular materials depending upon the purposes to which the invention is
to be applied in any particular case, some of its applications being specifically,
stated hereafter.
In carrying out the invention nitro-cellulose is dissolved in any of its known
solvents, such as amylacetate, ethylacetate, acetone, methyl-alcohol, benzine, etc.,
and to this solution is added the woel-fat or lanolin, the quantity of the latter
varying according to the purpose for which the composition is used. For instance,
if the composition is used as a water-proofing material, it may consist of 100 parts
of nitro-cellulose solution and 55 parts of lanolin. This produces a coating soft
to the touch, very flexible and without odor arising from the decomposition of the
wool-fat or lanolin. This solution may be applied in any well-known way to the
material to be coated, or it may be made into sheets, as for instance by spreading
it upon glass or other substance and permitting it to dry, when it may be removed
and constitutes a strong, flexible sheet of impervious or water-proof material
which may be used in any desired manner.
This composition of nitro-cellulose and lanolin may also be used for the produc-
tion of a polished or enamelled surface on leather or other similar materials, and
when so used it is preferable in many instances to combine with the nitro-
cellulose and lanolin a certain proportion of corn-oil. Thus, for instance, using
one gallon of amylacetate as a solvent and twelve ounces of nitro-cellulose, adding
thereto ten ounces of lanolin and three ounces of corn-oil, and preferably some
coloring matter, as for instance aniline black (the amount and character of the
coloring matter depending, of course, upon the shade or color of the. finished
article desired) produces a satisfactory polished or enamelled surface when applied
to leather or similar material, and this is quickly prepared, is quick to dry, and
renders leather or other material water and damp proof, as well as giving it a
finished coating which is exceedingly flexible, and not liable to crack.

page_text: The coating may be applied in any well-known manner, and when applied to
leather it is preferable to dress the leather to give it the required texture and
surface finish, as by subjecting it to the usual pumicing process and then applying
the coating in the usual way.
In some instances it is advantageous to employ a finishing coating of a solution
of nitro-cellulose, as for instance, one gallon of amylacetate to ten ounces of nitro-
cellulose, and this second coat is applied over the first coating, and in other cases
it is advantageous to employ a finishing coating of some other composition than
that named.
The above explanation will be sufficient to those skilled in the art to enable
them to make and use the invention, and will indicate its various applications and
adaptations, and while some specific uses have been described, the invention is not
limited thereto nor to the particular compositions recited, these varying in accord-
ance with the particular purpose for which the invention is used, the coating of
leather or similar fabrics being specifically referred to as that is one of the most
important uses.
Having now particularly described and ascertained the nature of the said invention
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 :-
1st. A composition of matter comprising nitro-cellulose and wool-fat or lanolin,
substantially as described.
2nd. A composition of matter comprising nitro-cellulose, lanolin and corn-oil,
substantially as described.
3rd. As a new article of manufacture, a leather or similar material having a
coating of nitro-cellulose and lanolin with or without corn-oil and with or without
a finishing coating, substantially as described.
Dated the 27th dow of Iul 1007