SU100416A1 - The method of obtaining a decorative coating - Google Patents

Description

One of the well-known methods of decorative finishing is the so-called "cracking paint" finishing.

The essence of the seizure of such a coating lies in the fact that on the ground, made on the basis of oil-glyptal or nitro-enamel paint, dried in a hot way, put cracking nitro-paint, which contains a large amount of pigments and a relatively small amount of film former, and They are a significant amount of acetone.

When such a nitro-paint dries in the paint layer, considerable stresses arise which, due to the low strength of the film, contribute to its rupture in various places and the detection of colored soil.

The main disadvantage of this Coating is the extremely low content of film-forming in its outer layer, as a result of which the coating has very low mechanical strength and requires additional lacquering of the already coated surface with nitrocellulose or nitroglyphthalic lacquer.

In order to eliminate this lack of decorative coating, in the proposed method for its preparation, the already well-known property of a number of organic paints is used to swell or shrink when a layer of another paint containing active solvents is applied on them.

A distinctive feature of the proposed method of obtaining a decorative coating is that the layer of paint applied on a horizontally disposed surface is not fully dried, covered with a second layer of paint containing a reduced amount of pigment and an increased amount of solvent causing the lower layer to swell, and then dried.

Practical implementation of the method consists in the following. A layer of, for example, an enamel paint based on oil-polish lacquer is applied to the surface of the paint, which is dried for a certain time, but to a state where it has not yet lost the reversibility of IB active solvents leading to stiffening.

After that, a layer is applied on the outer coating on the basis of any film-forming materials with normal or even low pigment content, but containing acetates, acetone, etc. in the composition of the solvent.

Upon application of the outer coating, the lower layer rapidly swells, forming a wrinkled surface, on which a depression is found in the hollows; and there the paint is the outer layer, and the tops of the ridges resulting from the swelling remain uncovered by the paint of the outer layer.

After volatilization of the main mass of solvent, the coated product enters the final drying at temperatures allowed for the outer layer of the coating. In the process of drying, the lower layer of the coating is leveled, and the outer layer dries out, forming a surface with a pattern similar to the pattern obtained by "cracking paints

Subject invention

A method of producing a decorative coating imitating the coating with cracking varnishes based on known paints and varnishes, characterized in that. in order to increase the mechanical strength of the coating, the layer of paint applied to the surface is not completely dried, covered with a second layer of paint containing a reduced amount of pigment and an increased amount of solvent causing the lower layer to swell, and then dried.