IMPROVEMENTS IN ASBESTOS PAINTS
Year: 1882

page_text: LETTERS PATENT to Charles James Mountford, of Birmingham, in the County
of Warwick, Paint Manufacturer, for an invention of "IMPROVEMENTS IN
ASBESTOS PAINTS."
PROVISIONAL SPECIFICATION left by the said Charles James Mountford
at the Office of the Commissioners of Patents on the 21st February 1882.
CHARLES JAMES MOUNTFORD of Birmingham in the County of Warwick, Paint
Manufacturer. " IMPROVEMENTS IN ASBESTOS PAINTS."
My present invention consists in combining asbestos and other substances in
such manner that paints suitable for various purposes having desired and excellent
properties, are provided:-
1. A fire proof and water resisting paint under my invention is composed of
asbestos, ground fine and re-ground in water, aluminate of potash, or soda, and
silicate of potash, or soda. These are by preference incorporated in a pug mill.
2. A paint suitable for general use and useful on exposed structures say sheds
or dock warehouses is made of asbestos, a suitable pigment, oil dryers, and gummy
matter. Copal or other varnish is found to answer as the gummy agent for
giving body. In some cases I add to the substances named zinc or iron oxide and
barytes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles James Mountford in the Great Seal Patent Office on the
21st August 1882.
CHARLES JAMES MOUNTFORD of Birmingham in the County of Warwick Paint
Manufacturer. "IMPROVEMENTS IN ASBESTOS PAINTS."
My present invention consists in combining asbestos and other substances as
hereinafter more particularly described in such manner that paints suitable for
various purposes having desired and excellent properties are provided It consists
of two parts as hereinafter set forth :-
First. A fireproof and water resisting paint under my invention is composed of
asbestos ground fine and reground in water aluminate of potash or soda and
silicate of potash or soda. Any suitable grinding or reducing apparatus may be
used; by preference the materials are incorporated or mixed in a pug mill.
A serviceable paint under this head is made by mixing or incorporating the
materials just mentioned in the following proportions, by weight asbestos Forty
parts water twenty seven parts aluminate of potash or soda thirteen parts and
silicate of potash or Soda twenty parts.
When these substances are well ground and incorporated in the following
proportions they make a paint possessed of high fire resisting properties Ground
or powdered Asbestos fifty parts Aluminate of potash two parts Silicate of
potash or soda thirty three parts water fifteen parts.
The compositions or paints above specified made into a stiff paste may be
afterwards reduced to the required consistency by a solution composed of equal
parts by weight of Silicate of soda and water.
The aluminate of potash or soda above referred to may be obtained by taking
three pounds of sulphate of alumina and adding thereto one gallon of a caustic
solution of Potash or Soda of specific gravity 1.270.
The alumina is dissolved in the potash or soda and the precipitate formed
is removed. The liquid remaining is the aluminate of potash or soda above
referred to.
Second. A paint suitable for general use and useful on exposed structures say
sheds or dock warehouses is made of asbestos a suitable pigment oil dryers and
and gunny matter. Copal or other varnish is found to answer as the gummy
agent for giving body. In some cases I use as the pigment zinc or iron oxide or
barytes. A suitable paint under this part of my invention consists of the following
by weight asbestos sixty parts pigment twenty parts oil and dryers twelve parts
and copal or equivalent varnish eight parts. After the above have been thoroughly
incorporated or mixed together they may be thinned down in any usual manner.
When a cheaper paint is required the following would answer Asbestos by weight
fifty parts Iron or zinc thirty five parts Oil dryers and gummy matter fifteen
parts.
Having now described the nature of my said Invention and particularised the
same in such manner that others will be enabled to carry my improvements into
practice I would have it understood that I do not confine myself to the proportions
above set forth as they may be varied without departing from the essentials of my
invention. That which I claim as my invention is as follows.
First Asbestos in combination with the other materials named in connexion
with the first part of this my invention substantially as and for the purposes
herein set forth in that behalf.
Second Asbestos in combination with the other substancos named in connexion

page_text: with the second part of this my invention substantially as and for the purposes
herein set forth in that behalf.
In witness whereof I the said Charles James Mountford have hereunto set
my hand and seal this twenty first day of August in the year of Our
Lord One thousand eight hundred and eighty two.
Signed sealed and delivered by the above
named Charles James Mountford in
the presence of
J. A. GARWOOD
CHARLES J. MOUNTFORD. (L.S.)
Clerk to Messra Ashurst Morris Crisp & Co.
Solicitors 6 Old Jewry London E.C.