FIELD: polymers, in particular diene rubber compositions reinforced with carbon white for production of pneumatic tire and intermediate therefor.
SUBSTANCE: sulfur-vulcanizing rubber composition for pneumatic tire production includes at least one diene elastomer (A component), carbon white as reinforcing filler (B component), binder of carbon white/elastomer having at least two functional groups, named as "X" and "Y" (C component), which may be grafted on the one side to carbon white via Y group, and on the other side to elastomer via X group, wherein X group represents α,β-unsaturated fatty acid ester having carbonyl group of general formula X 
1 in γ-position. In formula R, R1 and R2 are monovalent hydrocarbon radical or R1 and R2 may be additionally hydrogen atoms. Also disclosed are pneumatic tire in raw and cured form, semimanufactured tire, in particular thread running surface from said rubber composition. Method for production of rubber composition, method for binding of carbon white with diene elastomer includes thermomechanical blending of A, B, and C components in one or more steps up to maximum temperature of 110-190°C.
EFFECT: rubber composition with improved hysteretic properties, high mechanical and technological characteristics; pneumatic tires and intermediates made of the same with low rolling resistance and increased endurance.
30 cl, 3 dwg, 6 tbl, 4 ex
