SU43991A1 - Apparatus for accelerating the maturation of oil lacquers at elevated temperatures - Google Patents

Description

In the production of oil varnishes, they are kept for a very long period of time (about a year) in order to improve the quality of varnishes by maturation. It can be assumed that, during the ripening process, coagulation and precipitation of the smallest resin particles occur, which are not dissolved in oil. In addition, it is likely that some additional polymerisation of the oil occurs during the ripening process. Usually ripening varnishes occurs at a temperature of 15-20.

The proposed device allows this process to be accelerated by conducting it at 70-90 °.

The device shown in the vertical section of the drawing consists of a cylindrical tank / with a cone-shaped bottom part 2. The cylindrical part of the tank is provided with double insulation, and the cone-shaped part has the same insulation, but is detachable and consists of individual sectors gradually lift upwards. A steam coil 5 is placed under the lid of the tank / -2, and the expander 4 is attached to the lid itself in the form of a pipe of small diameter, 5-control valves, and a b-air tube; the device is also equipped with gauge glass, thermometers and drain valves.

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The lacquer maturation process is carried out as follows. After cooking, the hot lacquer is poured into the tank 7-2 in such quantity that the expander 4 is also partially filled with it. By insulating the tank and placing the steam coil under the hood, its ability to generate convection currents in the lacquer mass is minimized, and the expander 4 reduces the surface of the lacquer contact with air, which is highly desirable. To prevent ascending convection currents and to sediment the sediment, the conical part 2 of the tank can be cooled by freeing it from insulation to a greater or lesser extent. Thus, the proposed device allows the maturation of oil lacquers at elevated temperature and under conditions favorable for the quiet deposition of coagulated resin particles.

The subject matter of the invention.

A device for accelerating the maturation of oil lacquers at elevated temperatures, characterized in that the insulated tank / -2 is provided on the lid with an expander 4, which serves to reduce the surface of contact of the varnish with air.

2, In the device referred to in claim 1, the use of the coil 3, which serves to heat the contents of the tank.

3. In the device, referred to in paragraph 1, the use of removable insulation to cool the tank at the right time.