DE243832C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

243832 CLASS 75c. GROUP

THEODOR KÄMPFER in BARMEN.

Patented in the German Empire on December 17, 1910.

The invention relates to a water glass painting method, in which, to a premature connection the silicic acid of the water glass with the color pigment or with the substrate to prevent the paint pigment and the waterglass containing paint in known Way to be applied separately. Water glass coatings have so far had the disadvantage that the paint flakes off easily or,

ίο if there is no exfoliation that cracks form. These cracks and flaking are caused by the Brittleness, which is inherent in all silicates.

The invention eliminates these disadvantages of the known water glass paints in that lead glycerate is formed in the paint itself by simultaneously adding lead oxide to the paint and glycerine can also be used. Which is in the paint layer through evaporation of the water-forming cavities, as far as they are not caused by the other binding agents of the paint are filled, according to the invention by the formation of barium sulfate in the Painting filled in by yourself. The formation of barium sulphate can be achieved by adding chlorinated barium and Glauber's salt to the paint.

The process of making a paint subject of the invention is now the following:

The paint is made from separate paints, which are applied one after the other will.

First mixture: 3 parts of lead oxide, 3 parts of zinc oxide, 3 parts of a mineral or earth dye that has the desired color, ι part of potato flour and V ₂ parts of Glauber's salt are mixed very well with the addition of a little water and, if necessary, crushed further. The mixture is then heated in a boiling water bath and kept at this temperature for some time, the color mixture having to be reworked as far as possible. Now it is dried with the application of heat, for which purpose it still remains in the vessel and the water in the larger vessel must be kept warm. However, the water added to the mixture must not completely escape during the drying process. As soon as the mixture can be rubbed in, it is crushed well again.

Second mixture: a tar dye, its Color comes as close as possible to the mineral dye in the first mixture dissolved in about 33 percent glycerin diluted with water and then 5 percent of Chlorbarium added to the amount of liquid.

Third mixture: it becomes a dye of the desired color that does not apply to water glass May have a corrosive effect, kept separately in readiness.

Fourth mixture: 1 part will be 33 percent strength Glycerine mixed with 4 parts of 33 percent water glass.

For painting, the first mixture is rubbed with the second mixture and then applied to it painted surface. After a lapse of at least 12 hours it becomes the same

with the water glass and glycerine mixture mentioned in the fourth place, in which the Dye is added in a small amount, painted over. This painting can to be repeated after a few hours.

The chemical action of glycerine on lead oxide forms lead glycerate, a compound which achieves a greater strength than that created by the action of water glass

ίο silica compounds. .

The barium of the chlorobarium combines with the sulfuric acid of the Glauber's salt Barium sulfate. This freshly precipitated barium sulfate is very fine powder and is used to make the To fill the gaps between the dye off particles, so that the other binders the paint (starch paste, lead glycerate and the silicic acid compounds) is not the same great demands are made. Next to

for this purpose the barium sulphate has the same value as the water glass of the second Applying the paint, thereby helping to protect the lead oxide from exposure to the To help preserve the silica in the water glass, as this leads to the formation of lead glycerate through exposure to it of the glycerine must serve. The main purpose of the zinc oxide is to make the silica to bind the water glass, which under certain circumstances in addition to the barium sulfate also by the dye of desired Color is supported if it has a decomposing effect on water glass.

The value of the tar dye is in achieving the desired color more surely than this is possible through the mineral dye alone.

The 12 hour waiting time before the second coat is necessary to prevent the formation of lead glycerate Allow time, otherwise the silica in the water glass would mix with the lead oxide combine, and thus the main value of the painting process would be thwarted. Also the starch paste, which dries up Forms hard and solid mass, the lead glycerate supports the silicates in their brittleness gain weight. So that after the second dry rubbing it will improve its ability to Absorbing water, which is necessary to make it a binder, does not loses, the dye mixture should not be dried too much. It is recommended that the first dye mixture zinc chloride, calcium chloride and magnesium chlorine in very low levels To add amounts, the hygroscopic effect of which means that the starch paste dries too much prevented. The only purpose of drying is to obtain goods that are convenient for trade. The risk of moisture after the paint can act on it is eliminated by the second coat.

In order to increase the weather resistance of exterior paints, you can add one to this Use paint that is particularly suitable for this purpose.

Claims (1)

Patent claim: Water glass painting process, in which the color pigment and the Paint containing water glass are applied separately, characterized in that that lead oxide and glycerine are used at the same time in the paint, whereby Lead glycerate is produced and by adding suitable agents, such as chlorbarium and Glauber's salt, in which barium sulfate is formed in the paint itself.