ADDITIVE TO RUBBER COMPOSITIONS, METHOD OF PRODUCING ADDITIVE, METHOD OF PRODUCING RUBBER WITH HIGH ELECTRICAL CONDUCTIVITY AND PHYSICAL AND MECHANICAL PROPERTIES AND RUBBER Russian patent published in 2022 - IPC C08L21/00 C08J3/21 C08K3/04 C08L101/12 

FIELD: chemistry.

SUBSTANCE: present invention relates to a group of inventions: an additive to rubber compositions, which increases electrical conductivity and physical and mechanical properties of rubber, a method of producing an additive, method of producing rubber with high electrical conductivity and physical and mechanical properties, and rubber with high electrical conductivity and physical and mechanical properties. This additive contains from 1 to 20 wt. % of carbon nanotubes, from 3 to 90 wt. % of high-viscosity organic rubber and from 8 to 95 wt. % of low-molecular organic dispersion medium. Low-molecular organic dispersion medium is capable of dissolving high-viscosity organic rubber and can be selected from: oil with flash point higher than 200 °C and kinematic viscosity at 100 °C less than 0.1 St or a polar solvent with dielectric constant at 25 °C is more than 5 or one or a mixture of several esters of aliphatic alcohols with acids from the row: phthalic acid, terephthalic acid, sebacic acid, adipic acid or cyclohexane dicarboxylic acid. Method of producing the additive includes successive steps: step (I) - dissolving high-viscosity rubber in a dispersion medium and step (II) - dispersing carbon nanotubes in the solution obtained at step (I). This method of producing rubber includes a step for adding an additive containing carbon nanotubes to the rubber composition. This rubber contains from 0.01 to 1 wt. % of carbon nanotubes. Introduction of this additive into the rubber mixture when making the tire tread improves the quality of the tire.

EFFECT: development of an additive which increases electrical conductivity and physical and mechanical properties of rubber, such as modulus of elasticity, tear resistance, hardness, thermal conductivity, tensile strength, resistance to abrasive wear.

27 cl, 17 tbl, 54 ex