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
polysilylated organosilicon compound which is at least bifunctional and
can be grafted onto the elastomer by means of a sulfur group having a
polythiosulfenamide function, of formula:
.ident.Si--A--S.sub.x--NR.sup.1R.sup.2 , (I) in which: A is a divalent
bond group, whether straight-chain or branched, which makes it possible
to join the polythiosulfenamide group to a first silicon atom of the
organosilicon compound; x is an integer or fractional number of from 2 to
4; R.sup.1 represents hydrogen, a monovalent hydrocarbon group, or
R.sup.2; and R.sup.2 represents the grouping: --B--Si.ident., in which:
B is a divalent bond group, whether straight-chain or branched; Si
represents a second silicon atom of the organosilicon compound. The
invention also concerns tires and tire treads comprising a composition of
this type.