Rezinit. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Rezinit. Simple recipes and tips

Factory technologies - simple recipes

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Resinite, invented by Lebach, is similar to bakelite, both in terms of the method of manufacture and in terms of their properties. The difference in the manufacturing method is that neutral or alkaline-reactive salts are used as a condensing property, such as: sodium acetate, potassium chromate, neutral sodium sulfite, ammonium sulfite, sodium hyposulfite (hyposulfite), trisodium phosphate, soda, potash, carbonic acid ammonium, etc. Rubber can be obtained as follows.

Heat 100 wt. parts of phenol and 100 wt. h. commercial 1 formaldehyde 30 wt. hours (currently take from 1 to 10 parts by weight) of neutral sodium sulfite. The mixture is heated in an open container at the temperature of a water bath and, when a clean light yellow mass is obtained, the temperature is slowly increased to approximately 130 ° C, at which time the entire mass thickens into a solid glassy mass, which then takes the shape of the dish. The resulting mass is the final product of condensation, insoluble and infusible, amenable to lathe, grinding, polishing and painting.

The rubber mass is obtained without bubbles and in this respect it is an advantage over bakelite, i.e. it does not require the use of a bakelizer. Fillers such as talc, starch, casein, etc., as well as coloring agents are added to the reaction mixture during and after the reaction.

Resinite, like Bakelite, can be obtained in various forms. The liquid mass, or rather the plastic degree, corresponding to the shape of bakelite, is called the "rubber mass", while the finished product, corresponding to the degree "C" of bakelite, is called resinite II, resinite III, etc.

Rubber mass I, due to its water content, is a liquid material and can be used to coat wood, folders and other materials. After prolonged heating, the layer of rubber mass passes into the final degree of condensation. The materials covered with it acquire the ability to resist mechanical influences, moisture, decay, etc.

Rezinit II - is a viscous liquid from yellow to red. This mass can be obtained by heating for 6 hours at a temperature of 85 °C. This mass, when cooled, hardens into a purple-red transparent mass. It is used to make various jewelry: hat needles, beads, beads, fake enamel, putties, etc. A lighter type of resinite mass is obtained in a bakelizer.

Rezinit II special - serves exclusively for the manufacture of the already mentioned resinites III and IV. Again we get a yellow viscous liquid, from which a lot of crystals stand out. These crystals must be separated before use.

Rezinit III - obtained by mixing two parts of the rubber mass II with one part of potato flour. This mixture can be dyed in any color with aniline dyes, such as: red - cocgo, safranin, orange - chrysoidine, blue - methylene blue, brown - vesuvine, black - fine soot, green - diamond green, etc.

First dissolve the paint in water, alcohol or glycerin, cool well and quickly mix thoroughly, adding hydrochloric acid to the mixture (20%, sp. 1,10). At 10 wt. Part of the mass take 1 weight part of hydrochloric acid. Then, pour the cold mass into molds (the temperature of the molds is the same as the mass) and heat for 10-15 minutes at a temperature of 60-80 °C. The mass hardens completely and is easily removed from the molds. To neutralize the hydrochloric acid they contain, molded objects are placed in diluted ammonia for some time. Suitable materials for preparing molds are porcelain, glass, and polished metal molds, which must be coated with a thin layer of tsapon varnish before each use (to protect against the action of hydrochloric acid on the metal).

The rubber masses acquire the gloss of the matrices, so that in most cases polishing of molded objects is unnecessary.

Rezinit III is particularly suitable for the rapid production of clichés, both line and shadow. Resinite III is especially valued in engineering for its ability to be easily molded into moulds. Objects take on the details of the form, with such precision that the need for further processing is eliminated. It is also used for the manufacture of multi-colored tiles and inlay works.

Rezinit IV pIt is a mixture of 30% rubber mass II special and 70% kaolin. This mass is used for cold molding of various stone-like objects. By coloring, you can get a mass of any color. The above resinite masses have a natural color (without fillers) from yellowish to red, so that colorless objects cannot be made from them.

Rubber V is the final infusible and insoluble condensation product. Obtained by processing (heating) the original condensation product in a bakelizer. Resinite V is usually obtained in the form of white or painted in any color bars. It has excellent elasticity. The finished material lends itself easily to pointing, grinding and polishing. From a mixture of variously colored masses, imitations of marble, malachite, lapis lazuli, etc. can be obtained. In most cases, a bakelizer is not needed to obtain hard resinite masses, it can only be recommended in some cases.

Author: Korolev V.A.

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