Processing of old rubber. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Processing of old rubber. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Here are some recipes artificial rubber.

1st recipe

From the old, already unusable rubber a product is prepared that can be used like ordinary rubber and which, compared with the latter, has a significantly higher tear resistance due to the release of vegetable protein substances from the rubber during processing.

Old unusable rubber is first washed until all dirt adhering to it is completely removed, then it is immersed for several days in the liquid of the following composition. 3 g of emetic stone are dissolved in 4-300 buckets of boiling water and 1 kg of tannic acid or an appropriate amount of substances containing tannic acid is added to the solution. If the processed rubber becomes sticky, then the emetic stone is replaced with 600 g of calcium sulfate (the solution is prepared in cold water).

When processing rubber, which occupies a middle position between sticky and non-sticky, 250 g of calcium sulfite are added to the indicated solution of emetic stone. In this or that solution, the rubber is left until it is properly softened, then it is taken out and dried in warm air. Finally, it is rolled between rollers into more or less thin sheets, from which the necessary things are made, like ordinary rubber.

Rubber treated in this way tends not to attract moisture.

2st recipe

The old rubber is thoroughly crushed, mixed with equal parts by weight of technical castor oil and the mixture is heated to 180-210 °C until the rubber dissolves. After cooling, the mixture is poured into twice the volume of 90° alcohol. Then rubber is released from this mixture and settles to the bottom in the form of a viscous mass, and castor oil dissolves in alcohol. After this, separate the rubber from the rest of the mixture and wash it with a small amount of fresh alcohol (to remove any remaining castor oil) until a drop placed on the paper, after the alcohol evaporates, leaves no trace.

Since the resulting rubber mass contains some more alcohol, it is washed first in warm water mixed with a small amount of alkali, and then with clean tap water. Rubber rolled (rolled) into thin sheets soon completely loses moisture and acquires excellent qualities.

Author: Korolev V.A.

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