Patent ID: 7488768

Claim:
An elastomer composition based on a diene elastomer, an inorganic filler as reinforcing filler, a polyfunctional organosilane as (inorganic filler/diene elastomer) coupling agent bearing at least two functions denoted “X” and “Y” which are graftable, on the one hand, to the elastomer by means of the X function and, on the other, to the inorganic filler by means of the Y function, wherein said organosilane is a hydroxysilane polysulfide, and wherein the hydroxysilane polysulfide is a monohydroxysilane polysulfide having the formula (II): in which: the radicals R, identical or different, are methyl, ethyl, n-propyl or isopropyl; the radicals R′, identical or different, are methylene, ethylene or propylene; and x is equal to 2 or more, wherein the quantity of the reinforcing inorganic filler is between 10 and 200 phr (parts by weight per hundred of elastomer); and wherein the quantity of the hydroxysilane polysulfide is between 1 and 20 phr.