| abstract |
The field of the invention is the use: -> of an effective amount of a polyfunctional (A) coupling system (inorganic filler-elastomer); -> as an inorganic filler-elastomer coupling agent in rubber compositions comprising: (B) at least one elastomer of rubber, natural or synthetic type; (C) an inorganic filler as a reinforcing filler; (D) all or part of the other constituents or additives usually used comprising in particular one (or more) vulcanizing agent (s) (D1); -> said use being characterized in that: + the polyfunctional coupling system (A) consists of the combination of the following ingredients (A1) and (A2): (A1) being at least one coupling agent chosen from functionalized organosilicon compounds of formula (I): [(G <0>) 3SiO1 / 2] m [(G <0>) 2SiO2 / 2] n [G <0> SiO3 / 2] o [SiO4 / 2] p [(G <2>) a (G <1>) a '(Z-CO-N = N-CO-A) SiO (3-a-a') / 2] q in which the symbols Z, A, G <0 >, G <1>, G <2>, a, a ', m, n, o, p and q have the definitions given in claim 1; (A2): being at least one coupling agent chosen from either "symmetrical" polysulphide silanes or "disymmetric" sulphide silanes; + said polyfunctional coupling system (A) is incorporated into rubber compositions based on elastomers isoprenics. |