RUBBER FILLER Russian patent published in 2014 - IPC C08K3/04 C08K3/22 C08K3/36 C08L21/00 C01B33/12 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry, particularly to production of rubber mixture filler when producing rubber. The rubber filler includes basic powder of silicon dioxide, carbon, CaO, K₂O, Na₂O, MgO, Al₂O₃ impurities and a rubber lacquer coating. The filler has the following composition, wt %: SiO₂(26-98)+C(0.5-66) + Fe₂O₃(0.2-0.3) impurity + CaO, K₂O, Na₂O, MgO, Al₂O₃ impurities - the balance + over 100% rubber (1.2-7.8) and S (0.05-0.23) impurity (in SO₂, SO₃). The basic rubber is obtained by burning rice husks and has specific surface area of 150-290 m²/g; the silicon dioxide in the powder has the crystalline form of β-cristobalite with crystal dimensions: diameter 6-10, length 100-400 nm; the carbon is in the form of a carbon-like substance, coal or soot-like substance depending on the burning temperature. The rubber for coating is obtained by deposition from a water-acid extract of rubber-bearing plants: dandelion, Russian dandelion, fall dandelion, scorzonera tau-saghyz, centaurea. The filler is naturally homogeneous and dust-free.

EFFECT: rubber obtained using the filler has high strength, low modulus of internal friction, low wearability and thermal separation when mixing the rubber.

4 cl, 4 tbl