| abstract |
An elastomeric composition usable for the manufacture of tires, based on at least (i) a diene elastomer, (ii) an inorganic filler as reinforcing filler and (iii), as (inorganic filler/diene elastomer) coupling agent, a organosilicon compound which is at least bifunctional and can be grafted on to the elastomer by means of a sulfur group having a polythiosulfenamide function, of formula: n n≡Si-A-S x —NR 1 R 2 , (I) nin which: A is a divalent bond group, whether straight-chain or branched, which makes it possible to join the polythiosulfenamide group to a silicon atom of the organosilicon compound; x is an integer or fractional number of from 2 to 4; n R 1 represents hydrogen or a monovalent hydrocarbon group; R 2 represents a monovalent hydrocarbon group selected from among C 3 -C 8 alkyls, whether straight-chain or branched, C 5 -C 10 cycloalkyls, C 6 -C 18 aryls and (C 6 -C 18 )aryl-(C 1 -C 8 )alkyls; R 1 and R 2 possibly forming together and with the nitrogen atom to which they are bonded a single hydrocarbon ring. Tires and tire treads comprising a composition of this type. |