Galalite

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Buttons made of galalite Formaldehyde (H2C = O) combines polypeptide chains to form a methylene bridge between them

Galalite (artificial horn, caseinite) - plastic obtained from casein, which is subjected to homogenization and hardened in formalin; looks like a horny mass. It was first produced accidentally by Wilhelm Krische in 1897.

Galallite is a thermosetting thermoplastic and is a modified natural polymer. The preparation consists of isolating casein from cow's milk and curing it with 5% aqueous formaldehyde solution.

Galallite is hard plastic. Finished products are obtained almost exclusively by machining from suitable pipes, rods, etc. Machining is easy and can be carried out using metal tools.

During heating, the galallite softens at 90 ° C. Introduced to the flame of the gas burner gives a bright, bright flame, giving off the smell of burned milk.

Galallite is very resistant to water, soaked, soaked and soaked. At room temperature, it absorbs up to 12% of water within 24 hours. Similar effects occur under the action of acids and bases and temperatures above 50 ° C. On the other hand, galallite exhibits a high resistance to organic solvents. Cracked or broken gallete objects can be glued, for example, with casein glue.

Formerly used for making toys and fancy goods (eg buttons), tokens, fountain pens, spectacle frames, chess pieces, as well as for electrical engineering.

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