AN IMPROVED FIRE PROOF PAINT.
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Charles James Mountford at
the Office of the Commissioners of Patents on the 16th January 1882.
CHARLES JAMES MOUNTFORD, of Birmingham in the County of Warwick Paint
Manufacturer AN IMPROVED FIRE PROOF PAINT.
My Invention consists essentially in using ground asbestos, silicate of soda, or
potash, and water well mixed as the ingredients in my new paint, which paint not
only resists fire but has good covering body. My Invention also consists in.new.
methods of mixing these substances or ingredients.
In preparing my said paint I proceed under one modification as follows :--I first
reduce the asbestos to a fine state of division usually making it into a stiff paste.
I then mix the silicate of soda and water say in the proportion of %, ths of the
former to 37, ths of the latter with heat and by preference under pressure above
that of the atmosphere. A jet of steam at a temperature of about 240° Fahr.
allowed to rise through the mass answers well. The asbestos paste is thinned
down by the mixed silicate of soda and water to the required consistency in a pug
mill edge runners or the like and is then fit for use. Colouring matter of any
desired kind can be added,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and
of an Order of the Lord Chancellor filed by the said Charles James Mountford
in the Great Seal Patent Office on the 15th July 1882.
CHARLES JAMES MOUNTFORD of Birmingham in the County of Warwick Paint
Manufacturer' "AN IMPROVED FIRE PROOF PAINT."
.
My Invention consists essentially in using ground asbestos, silicate of soda or
potash and water well mixed as the ingredients in my new paint which paint not
only resists fire but has good covering body. My Invention also consists in new
methods of mixing these substances or ingredients.
f
In preparing my said fire proof paint I proceed as follows:-
I first reduce the asbestos to a fine state of division usually with water to a stiff
paste by means of a pug mill or suitable grinding apparatus I then mix the reduced
asbestos with a strong solution of silicate of soda in water: five parts by weight of
the former to three parts of the latter. During mixing the mass of the material.
being treated is maintained at a temperature which may vary from 150° Fahrenheit
to 240° Fahrenheit a temperature of about 160° Fahrenheit being found most
suitable. The heating is advantageously effected by causing a jet of steam to rise
through the mass, or the mixture may be conveniently heated in a closed vessel say
of cast iron provided with stirrers motion being given to the vessel the stirrers or
both. After the incorporation the paste so formed is thinned down to the required
consistency for use with a weaker solution of silicate of soda in water. Colouring
matter of any desired kind may be added to the reduced asbestos and silicate
solution whilst they are being incorporated together.
The proportions of the materials used may be varied to suit requirements but
the proportions and method of treatment above set forth are those of which I
approve. Silicate of potash may be used instead of silicate of soda.
:-
Having now described and particularised the said Invention in such manner that
others will be enable to carry my improvements into effect I claim :-
The composition and manufacture of fire proof paint substantially as herein set
forth.
In witness whereof I the said Charles James Mountford have hereunto set
my hand and seal this Fourteenth day of July in the year of our Lord One
thousand eight hundred and eighty two.
CHARLES JAMES MOUNTFORD. (L.S.)