Use of a particular combination of a coupling agent and a coating agent as a coupling system (white-elastomer filler) in rubber compositions comprising an inorganic filler

摘要

Use → of an effective amount of a coupling system (A) (inorganic-elastomeric load) 5 comprising a functionalized organosilane that carries at least two functions marked by "X" or "Y", which on the one hand can be grafted onto the elastomer by means of the "X" function, and by another on the inorganic load by means of the "Y" function; → as an inorganic-elastomeric loading coupling agent in rubber compositions comprising: * (B) at least one natural or synthetic rubber elastomer; * (C) an inorganic charge as a reinforcement charge; * (D) all or part of the other constituents or additives selected from: one (or more) vulcanizing agents (D1), optionally one (or more) vulcanizing accelerators (D2), optionally one (or more) vulcanizing activators (D3), optionally one (or more) non-white reinforcing charges (D4), optionally one (or more) little or no reinforcing inorganic charges (D5), optionally one (or more) protective agents (D6), optionally one ( or more) plasticizers (D7), and mixtures of these species; → said use being characterized in that: + the coupling system (A) consists of a particular combination based on the combination of the following ingredients (A1) and (A2): - (A1) which is at least one selected coupling agent among the products with the formula: - (C2H5O) 3Si- (CH2) 3-NH-CO-N = N-COOC2H6 (A1-1) - mixtures of species (A1-1) with the following species (A1-1 ') and (A1-1 ") [(CH3) 3SiO1 / 2] [(C2H5O) 2 {(CH2) 3-NH-CO-N = N-COOC2H5) SiO1 / 2] (A1-1') [ (CH3) 3SiO1 / 2] 2 [(C2H5O) {(CH2) 3-NH-CO-N = N-COOC2H5} SiO2 / 2] (A1-1 ") - (CH3) 2 (C2H5O) Si- ( CH2) 3-NH-CO-N = N-COOC2H5 (A1-2) - (CH3) (CH3O) 2Si- (CH2) 3-NH-CO-N = N-COOCH3 (A1-3) - ( CH3) 2 (OH) Si- (CH2) 3-NH-CO-N = N-COOCH3 (A1-4) - (C2H5) 2 (OH) Si- (CH2) 3-NH-CO-N = N-COOC2H5 (A1-5) - (CH3) (CH3O) 2Si- (CH2) 3-CO-N = N-COOCH3 (A1-6) - (CH3) 2 (OH) Si- (CH2) 3- CO-N = N-COOCH3 (A1-7) - (C2H5) 2 (OH) Si- (CH2) 3-CO-N = N-COOC2H5 (A1-8); - (A2) which is at least one reinforcing agent of the reinforcing charge consisting of a compound comprising in its structure only the "Y" function, which can be physically and / or chemically bound to the inorganic filler and is capable of facilitating the use, by improving the dispersion of the charge in the rubber matrix and reducing the viscosity of the compositions, of the raw compositions, said compound which is a polyorganosiloxane of the formula: ** Formula ** with r having a value that ranges between 3 and 10.