An Improved Manufacture of Plastic Materials.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
An Improved Manufacture of Plastic Materials.
I, FRANZ GUSTAV KLEINSTEUBER, of 18, Wollankstrasse, Berlin-Pankow, in
the German Empire, Manufacturer, do hereby declare the nature of this inven-
tion to be as follows:-
For the manufacture of certain plastic materials, which become hard, out
of difficulty-soluble resins, it is necessary to bring the latter into solution.
As is known, however, very many kinds of resin can only be dissolved with
difficulty and incompletely in the usual agents or solvents. More especially is
this the case with the difficultly-soluble copals which are however particularly
suitable for the manufacture of plastic hardening materials on account of their
other properties.
By my improved process, the trouble with difficultly-soluble resins is obviated
by employing, in addition to the known solvents, a special mixture forming the
subject of my invention, as an additional ingredient.
The mixture is made as follows:-
5 parts of Dammar resin are dissolved in 10 parts of benzol and 5 parts of
turpentine oil.
Then 50 parts of Chinese wood-oil, 23 parts of benzol and 5 parts of turpentine
oil are mixed together.
The two solutions above mentioned are then stirred together with moderate
heating (40 to 50 degrees Centigrade) and finally 2 parts of rosemary oil are
added. The proportions of other ingredients, such as ethereal solvents, can
be increased or reduced, or the said ingredients can be dispensed with.
The above described mixture is employed as follows:-So much of the said
mixture is added with moderate heating (40 to 50 degrees C.) to the solvent for
the resin (turpentine oil, benzol, spirit, or a mixture of these or similar sub-
stances), either immediately or in a later stage of the manufacture, that the
addition amounts to from 1 to 10 per cent. of the weight of the resin.
In order to obtain a good result, it is absolutely necessary to allow the pro-
duct (with or without the addition of filling materials, such as asbestos, mica,
or the like), before it is dried, to stand for some time, e.g., for about 24 to
48 hours.
The mucilaginous or slimy residues in the resins, which are of the greatest
importance for the final product, are thus brought into solution and introduced
into the material whereby they can intimately and firmly combine therewith.
By these means, therefore, the manufacture of plastic hardening materials
is facilitated and improved to an extraordinary degree since, by the aid of the
additional admixture or ingredient, the resins can not only be completely dis-
solved, but also, by reason of the Dammar resin and wood oil in the solvent
(the said wood oil being especially distinguished by rapid drying from beneath
as compared with linseed oil), it is influenced advantageously in its physical
properties in that its solidity is considerably increased. Since the brittleness of

page_text: the material is thus reduced to a minimum, it is especially suitable for the
manufacture of articles or objects which are subjected to shocks, vibrations or
the like of any kind, and is consequently particularly adapted for use in the
manufacture of insulators for electrotechnical purposes.
Dated this 16th day of December 1899.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.
An Improved Manufacture of Plastic Materials.
I, FRANZ GUSTAV KLEINSTEUBER, of 18, Wollankstrasse, Berlin-Pankow, in
the German Empire, Manufacturer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:—
For the manufacture of certain plastic materials, which become hard, out
of difficulty-soluble resins, it is necessary to bring the latter into solution.
As is known, however, very many kinds of resin can only be dissolved with
difficulty and incompletely in the usual agents or solvents. More especially is
this the case with the difficultly-soluble copals which are however particularly
suitable for the manufacture of plastic hardening materials on account of their
other properties.
By my improved process, the trouble with difficultly-soluble resins is obviated
by employing, in addition to the known solvents, a special mixture forming the
subject of my invention, as an additional ingredient.
The mixture is made as follows:-
5 parts by weight of Dammar resin are dissolved in 10 parts of benzol and
5 parts of turpentine oil.
Then 50 parts by weight of Chinese wood-oil, 23 parts of benzol and 5 parts
of turpentine oil are mixed together.
The two solutions above mentioned are then stirred together with moderate
heating (40 to 50 degrees Centigrade) und finally 2 parts by weight of rosemary
oil are added. The proportions of the ethereal solvents, can be increased or
reduced.
If no Dammar resin is employed, the solution of wood oil must be considerably
diluted, i.e., more ethereal solvents should be used.
In the mixture herein described, only the Chinese wood oil is the essential
ingredient. The additions of Dammar resin, etc. to the said mixture are not
made for the known purpose of increasing the solubility of the hard resins in
linseed oil, as is the case in the manufacture of oil varnishes, but these additions
are to bring the Chinese wood-oil into such a condition that the latter combines
with the solvents of the resins or with the resin solutions themselves without
causing precipitation or being precipitated.
The above described mixture is employed as follows:-So much of the said
mixture is added with moderate heating (40 to 50 degrees C.) to the solvent for
the resin (turpentine oil, benzol, spirit, or a mixture of these or similar sub-
stances), either immediately or in a later stage of the manufacture, that the
addition amounts to from 1 to 10 per cent. of the weight of the resin.
In order to obtain a good result, it is absolutely necessary to allow the pro-
duct (with or without the addition of filling materials, such as asbestos, mica,

page_text: or the like), before it is dried, to stand for some time, e.g., for about 24 to
48 hours.
The mucilaginous or slimy residues in the resins, which are of the greatest
importance for the final product, are thus brought into solution and introduced
into the material whereby they can be intimately and firmly combined therewith.
By these means, therefore, the manufacture of plastic hardening materials
is facilitated and improved to an extraordinary degree since, by the aid of the
additional admixture or ingredient, the resins can not only be completely dis-
solved, but also, by reason of the Dammar resin and wood oil in the solvent
(the said wood oil being especially distinguished by rapid drying from beneath
as compared with linseed oil), it is influenced advantageously in its physical
properties in that its solidity is considerably increased. Since the brittleness of
the material is thus reduced to a minimum it is especially suitable for the
manufacture of articles or objects which are subjected to shocks, vibrations or
the like of any kind, and is consequently particularly adapted for use in the
manufacture of insulators for electrotechnical purposes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. A process of manufacturing plastic hardening materials from resins,
characterized by the addition of a solution of Chinese wood-oil to the solvent
of the resins, for the purpose of making the resins more completely and more
easily soluble and to increase the solidity of the plastic hardening material, sub-
stantially as described.
2. The manufacture of plastic hardening materials, characterized by the
addition, to the solvent for the resins, of a suitably made mixture of about
5 parts by weight of Dammar resin, and
50 parts of Chinese wood oil
in benzol, turpentine oil and rosemary oil, for the purpose specified.
Dated this 18th day of Var 1900
of May 1900
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.