An Improved Acid-proof or Non-conducting Material for Electrical and other Purposes and Method of Preparing the same.
Year: 1898

page_text: Date of Application, 13th Dec., 1898 -Accepted, 11th Mar., 1899
An Improved Acid-proof or Non-conducting Material for Electrical
and other Purposes and Method of Preparing the same.
We, CARL JUNG, Engineer, of 17, Hernalser, Hauptstrasse, XVII, ADOLF
BRECHER, Banker, of 2, Liechtensteinstrasse, IX., and ADOLF KITTEL, Electrician,
of 19, Herthergasse, all in Vienna, in the Empire of Austria, 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:-
This invention relates to the preparation of an improved material from caseine
which, owing to its firmness, its acid-proof, fire-resisting and insulating properties,
and its moderate cost, is adapted for various purposes in the manufacturing
industries, but more particularly for use as an insulating material in electrical
arts. By reason of its character it may be sawn asunder, turned in a lathe, carved,
ground, or polished, and otherwise operated upon; and, according to the colours
incorporated therein during the process of manufacture, it may be caused to
assume the appearance of ivory, horn, wood, coral, marble, vulcanized rubber, or
the like.
The method of preparing the material is as follows;-Caseine, as obtained from
skimmed milk in any of the well-known methods--which, from the dairy-farming
point of view, has not been fully taken advantage of is crushed in a suitable
mill, while at the same time cellulose, and suitable colouring matter, such as
aniline or earth-colours, according to the particular substance the finished product
is desired to imitate, are added. It is then well mixed with a resin solution, for
example, about 200 grammes of gum-sandarack or about 200 grammes of mastic-
or both, taking approximately 100 grammes of each-dissolved in 1 litre of alcohol
for every 100 litres of skim-milk; about 200 grammes of some resinous oil-
simplest of all turpentine oil-being stirred into the mixture at the same time.
The semi-liquid paste thus obtained is stirred about, for a somewhat lengthy period
of time, and, towards the end of the stirring operation, some amber-solution at
about 3 per cent. is poured in.
The material should in the course of the treatment be maintained at a temper-
ature of about 50° Centigrade; it being ultimately pressed to any desired shape,
such as rods, plates or the like.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we claim :-
1. The herein described method of preparing acid-proof and non-conducting
material for electrical and other purposes, same consisting in mixing caseine with
resinous solutions which may consist of mastic or gum sandarack dissolved in
alcohol and turpentine oil, together with a small amount of amber solution and
cellulose; suitable colouring matter being added to impart the desired appearance,
whether of ivory, horn, wood, marble, hard rubber, stabilite or other substance.
2. In the preparation of acid-proof or non-conducting material for electrical

page_text: and other purposes, the employment of crushed caseine in conjunction with gum-
sandarack or mastic or both, resinous oil, such as terpentine oil, cellulose, colour-
ing matter and amber solution, in or about the quantities specified; the mixture
being kept stirred and maintained at a temperature of about 50° Centigrade, sub-
stantially as set forth.
3. As a new article of manufacture, acid-proof or non-conducting material, for
electrical and other purposes, prepared from caseine, substantially as set forth.
UITES
en mer
01 December
1090.
For the Applicants,
G. G. M. HARDINGHAM,
Chartered Patent Agent.
Clun House, Surrey Street, London, W.C.