Use of organosilicon intended a compound bearing at least one azo activated, as coupling agent (white filler - 29) in the rubber compositions comprising an inorganic filler

摘要

The field of the invention is the use of: - of an effective amount of a coupling agent (a) comprising an organosilicon compound functionalized; - as coupling agent inorganic filler - elastomer in the rubber compositions comprising: (b) at least one elastomer of the rubber type, natural or synthetic; (c) an inorganic filler as reinforcing filler; (d), all or part of the other ingredients or additives commonly used in particular comprising a (or) agent (s) of vulcanization (d1); - said use, is characterized in that: + the coupling agent (a) is an organosilicon compound functionalized consisting in the species (i) and (2i) following: (i) being at least one oligomer siloxane functionalized corresponding to the formula (i) below: [(g 0 ) 3sio1 / 2] m [(g 0 ) 2sio2 / 2] n [g 0 sio3 / 2]. [sio4 / 2] p [(g 2) is (g, 1 ) a (z - co - n = n - co - a) sio (3 - to - a ′) / 2] q in which the symbols z, g, 1 2 g, g & 0 & gt, a, a ′, m, n, o, p and q have the definitions indicated in claim 1, (2i) being a mixture of at least a siloxane functionalized (i) with (3i) at least a functionalized organosilane corresponding to the formula (i) in which m = n = o = p = 0 (zero), q = 1, a becomes an integer chosen from 0, 1, 2 and 3 and the sum a + a ′ = 3; + said coupling agent (a) is incorporated into the rubber compositions based on elastomers, isoprene.