FIELD: chemistry of polymers.
SUBSTANCE: invention relates to an elastomeric composition that can be used in making pneumotires or intermediate products for pneumotires. The composition is based on at least one diene elastomer, inorganic filling agent as an enhancing filling agent, polyfunctional organosilane, namely hydroxysilane of the general formula (I) given in the invention description as a binding agent (for system inorganic filling agent/diene elastomer) comprising at least two functional groups designated as "X" and "Y" that can be grafted to elastomer by one side using function X, and to inorganic filling agent by other side using function Y that represents hydroxysilyl function (≡Si-OH) and wherein organosilane is represented by hydroxysilane polysulfide of the general formula (I), and wherein the amount of inorganic enhancing filling agent is from 10 to 200wpe (weight parts per 100 weight parts of elastomer), and the amount of hydroxysilane polysulfide is in the range from 1 to 20wpe. Also, invention relates to a method for preparing the claimed elastomeric composition showing the improved kinetics of vulcanization by thermomechanical stirring components of the composition for one or two steps up to achievement of maximal temperature from 110 to 190°C. Also, invention relates to using this composition for manufacturing pneumotires or intermediate products designated for pneumotires, for example, protectors, sublayers, sides and so on, and to a pneumotire and an intermediate product for pneumotire containing such elastomeric composition, to a protector for pneumotire made of this composition and to pneumotire containing such protector. Also, invention relates to using a polyfunctional organosilane as a binding agent and to a method for binding inorganic and diene elastomer in an elastomeric composition by polyfunctional organosilane. The claimed elastomeric composition provides satisfactory reserve of safety with respect to the burning problem, it possesses a lower value of Mooney plasticity resulting to good ability for treatment in crude state and possesses the improved hysteresis properties and the improved the conversion constant rate and therefore vulcanization can be carried out for significant shorter time. Protectors made of the proposed composition possess low resistance to rolling motion and enhanced abrasion resistance.
EFFECT: improved and valuable properties of mixture.
32 cl, 2 tbl, 2 dwg
