| abstract |
The present invention is prepared from at least one elastomer, an inorganic reinforcing filler, an agent for coupling the elastomer with the inorganic reinforcing filler, and a crosslinking system; The inorganic reinforcing filler relates to a rubber composition comprising at least one silica S having the following: CTAB specific surface area S CTAB in the range from 40 to 300 m 2 / g; The difference between the BET specific surface area S BET and the CTAB specific surface area S CTAB of at least 35 m 2 / g; Aluminum content W Al in the range from 0.5 to 7.0% by weight relative to the weight of silica S; An aggregate size distribution width Ld, measured by centrifugal sedimentation, of at least 1.5; And for a given CTAB specific surface area S CTAB value and a given aluminum content W Al , the amount A is defined by the following equation (I): Where [d50] is a value of d50 expressed in nm; [S CTAB ] is a value of S CTAB expressed in m 2 / g; [W Al ] is expressed in weight percent of the weight of silica S Value of W Al ); Median aggregate diameter d50 measured by centrifugal sedimentation such that the amount A satisfies the following relation (II): . The compositions of the present invention can be used in tires or semi-finished articles for tires. |