Both active filler (furnace black) and mineral fillers are used in general-purpose tyre rubber formulations. The aim of the present study is to examine the possibility of using new mineral fillers-shungite and thermin-in a general-purpose tyre rubber formulation (instead of BS-120 silica or kaolin) in combination with furnace black. Shungite is a finely-ground natural mineral (from the Karelia deposit), containing oxides of Si (65%), Al (4.5%), Fe (5.4%), K, Na, Ca (total 3.58%), Ti, Mn, Ni, Cu, Zn (total 0.33%) etc.; average particle size 2-3 µm; crystals of lamellar shape. It is produced in accordance with TU 88-003-90.
Earlier [1] we studied the possibility of producing highly dispersed powders of new mineral fi llers-shungite (a mineral of natural origin, Kareliya) and "termin" (specially treated ash from the burning of solid fuel at thermal electric power plants) in planetary mills-new-generation grinding equipment, and also their use in rubber mixes and compounds based on butadiene-styrene rubber SKMS-30ARKM-15. The results obtained made it possible to conclude that the introduction of highly dispersed shungite and termin leads to improved properties of rubber compounds.
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