Year: 1888

page_text: Date of Application, 25th July, 1888
Complete Specification Left, 23rd Apr., 1889
Complete Specification Accepted, 1st June, 1889
I, FRIEDRICH WENDLING of Munich, in the Empire of Germany, Chemist, do
hereby declare the nature of this invention, to be as follows:-
The object of this invention is a new composition forming a most durable painting
material for stones, cement, plaster or other purposes. To produce the new paint,
hydrous minerals such as double silicates of alumina, lime and alkali (comprising
therefore the zeolites) are mixed in such proportions as to form a mass of approximately
the following composition of equivalents:
Silicic acid, 10 to 12; alumina (and oxide of iron) 2 to 4; lime (and magnesia) 1
to 3; soda (and kali) 2 to 5; water 3 to 8.
This mass is added to the required quantity of powdered paint, and the whole is
well ground.
The mixture thus produced has the advantage that it can be stored and brought
into trade in form of a dry powder. To use the said mixture it is blended with the
requisite quantity of milk-of-lime thus producing a very durable coating for natural
or artificial stones, lime- and cement-plastering etc.
The new paint is very adhesive and is not only very proof against atmospheric
influences but even gains through the latter in firmness and solidity.
The dry mixture may be conveniently produced by mixing the following units of
weight:
Natrolite 35, Apophyllite 15, colour powder 50, or
Epidote 15, Natrolite 35, colour powder 50, or
Chlorite 32, Natrolite 18, colour powder 50, or
Idocrase (volcanic schorl) 10, Natrolite 40, colour 50, etc. etc.
To zeolitic mixtures deficient in alkali a corresponding quantity of powdered
silicated soda, or kali, may be added.
For very light paint, containing less than 50 per cent. of colour-powder, such
zeolites must be chosen as contain few colouring elements, viz.: oxide of iron or
manganese, using either more zeolite powder or adding a corresponding quantity of
neutral substances, for instance fluoride of calcium, chalk, lime stone.

page_text: Also artificial silicates of protoxide of similar composition as the above-mentioned
may be used, for instance, in units of weight: quartz-powder 50, kaoline, or pipe-
clay 30, powdered slaked lime 8, (or a corresponding quantity of powdered lime-
stone), dry soda or potash 10, the whole being mixed with a suitable quantity of
water and formed into cakes which are subsequently dried, baked in the kilns and
ground.
The colour-powders must be such, that their colouring capacity is not impaired by
alkali and caustic lime.
When using the paint, one volume of zeolitic colour-powder is mixed with about
6 volumes of milk of lime of 22 degrees Beaumé. The surface to be coated must
previously be moistened as for lime-paint. Walls that do not absorb the fluid uniformly
are preferably given previously a coating of zeolitic powder and milk-of-lime, the
painting proper taking place about 24 hours later.
If the paint is packed in air tight receptacles, for instance tin boxes, the milk of
lime may be replaced by adding caustic lime to the zeolitic mixture, while being
ground, in a proportion corresponding to the amount of lime contained in the
quantity of milk of lime mentioned above. In this case only the addition of water
is required for using the paint.
Tate th: 25th day of Jul 1888

page_text: I, FRIEDRICH WENDLING of Brunnstrasse 9, Munich, in the Empire of Germany,
Chemist, 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 a new composition forming a very durable painting
substance more particularly for stones, cement and plaster. The new painting
material, which is not only very proof against atmospheric influences, but even
gains through the latter in firmness and solidity, consists of a suitable quantity of
powdered paint and such minerals which are hydrous double silicates of alumina,
lime and alkalis and comprise therefore the zeolites. These minerals are mixed
in such proportions as to constitute a mass of approximately the following
compositi
•

page_text: Also artificially produced double silicates of a
to above, may be used, for instance :
composition similar to that referred
30
"
"
"
"
10
"
"
kaoline, or pipe clay,
powdered slaked lime or a corresponding quantity
of powdered lime stone,
dry soda or potash,
this mixture being formed into cakes by means of water, dried, baked in the
kilns and ground.
The powdered colour used must be of such a quality, that its colouring capacity
is not affected by alkalis and caustic lime.
When using the improved painting material, about one volume of zeolitic painting
powder is mixed with about six volumes of milk of lime of 22° Beanmé. The surface
to be painted is previously moistened as with ordinary lime paint.
Surfaces that do not absorb liquids uniformly are preferably given a previous coat
consisting of zeolitic powder and the corresponding quantity of milk of lime, the
painting proper taking place about 24 hours later.
If the improved painting material is packed in air-tight receptacles, for instance
tin boxes, it may contain, incorporated therein while grinding, caustic lime in a
proportion corresponding to the amount of lime contained in the quantity of milk of
lime referred to above, the subsequent addition of the latter being thereby dispensed
with and only water being added when using the painting material.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what
1 claim is:
A painting material for stones, cement, plaster etc. consisting of finely ground
natural or artificial zeolitic bodies so as to contain, in the proportions specified, silicic
acid, alumina and oxide of iron, lime and magnesia, soda and potash, and of water
and powdered paint in the proportions mentioned in the specification, substantially as
set forth.
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