Year: 1887

page_text: Date of Application, 17th Sept., 1887
Specification Accepted, 1st Nov.. 1887
I, JOHN CHESTER LYMAN Physician of Woburn Place in the County of Middlesex
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:-
My invention relates to an improvement in Paint Compound, and in a method of
preparing the same, which will be more fully explained by reference to the following
specification.
or
In making my paint I employ a solid residuum known as " factitious"
"artificial" maltha produced in the manufacture of petroleum oils, and having little
or no paraffine in it, and which has hitherto been believed to be insoluble except in
certain volatile products such as bi-sulphide of carbon; the objection to the use of
which material is the disagreeable odor, and, secondly, the very volatile character
which makes it impossible to keep the paint thin enough for proper application and
spreading.
I have discovered that by boiling the factitious or artificial maltha with benzine a
change takes place in which such a union is formed that the said maltha will remain
in perfect solution in the benzine for a long time without settling to the bottom, or
without there being sufficient evaporation to cause it to perceptibly thicken beyond
the proportions in which it was originally made.
Previous to my invention it has not been possible to dissolve the factitious or arti-
ficial maltha in benzine alone, although benzine has been employed, after the solution
has been made in bi-sulphide of carbon, as a vehicle to prevent the rapid drying-up
of the compound.
To carry out my invention I take, in ten parts, either four of the maltha and six of
the benzine, or from that to seven of said maltha and three of benzine. In some cases
for certain purposes I may add one or two parts of oil and from one to four parts of
turpentine, in which case I would use only one part of benzine and four parts of

page_text: factitious or artificial maltha. This forms a very good compound for coating metals.
When it is desired to make various colors I add any desired pigment, such as
Venetian Red, in which case I would use five parts of factitious or artificial maltha,
three parts of Venetian Red, two parts of oil and two parts of benzinc.
In order to prepare this compound first melt the factitious or artificial maltha
until it is in a comparatively fluid condition, then add the pigment, oil, turpentine and
benzine, or such proportion as may be used for either compound desired, and boil the
whole from ten to thirty minutes. The act of boiling the ingredients together appears
to produce some change by which the maltha is dissolved in the benzine, and will
thereafter always remain in suspension and perfectly mixed, whereas, if any attempt
be made to dissolve the factitious or artificial maltha in benzine cold it will simply
make an intimate mixture, if pulverized fine enough, but will settle to the bottom in
a short time, leaving the benzine at the top. By my process I make a perfectly
limpid and flowing compound which may be left standing open without any appre-
ciable change, and can be applied se as to form a perfect coating to any desired
surface.
This material is valuable for waterproofing cloth, leather, paper, or protecting metal,
or whatever substance it may he applied to, and for painting both inside and outside
surfaces, the proportion of the ingredients described above depending upon the class
of work to which it is applied.
When it is desired to employ this paint upon surfaces, like furnace fronts or furness
doors, which are subjected to great heat, I mix with it a proportion of graphite or
asbestos, or similar incombustible substance. In this case I would use about three
parts of graphite or asbestos, three parts of the factitious or artificial maltha, one part
of oil, and three parts of benzine.
Other materials necessary to the composition of paints for various purposes may be
added to my composition before described; but such materials are not claimed in this
application.
Having now particularly described and ascertained the nature of my Invention, and
in what manner the same is to be performed, 1 declare that what I claim is:
1. A new composition of matter-factitious or artificial maltha (the solid residuum
which remains after the distillation of petroleum) boiled or dissolved in benzine,
substantially as described.
2. The process herein described which consists in boiling and dissolving in benzine
the hard solid residuum which remains after the distillation of petroleumi or similar
oils from their natural sources.
Dated this Seventeenth day of September 1887.