FIELD: construction and furniture industries; agricultural and automotive engineering.
SUBSTANCE: method for producing carbonate-containing filler from renewable raw materials includes preliminary preparation of natural raw materials and final drying. As a renewable natural source of raw materials, egg shells are used, which are washed with water, 5% sodium hydroxide solution, sonicated for 2 hours, washed with water until neutral, and dried. After drying, the shell is crushed to a fraction of less than 200 microns, treated with stearic acid and again sonicated for 2 hours.
EFFECT: invention improves environmental safety in manufacturing polymer compositions and rubber compounds while maintaining their physical, mechanical, operational and technological characteristics.
1 cl, 3 tbl, 2 ex
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