The use of organosilicon compounds having at least one as a coupling agent in rubber compositions containing a white filler, the ethylenic double bond which is activated

摘要

The field of the present invention is that of the use of a compound comprising a polyfunctional polyorganosiloxane (abbreviated as POS) bearing, firstly, at least one hydroxyl radical and/or at least one alkoxy radical and, secondly, at least one activated ethylenic double bond, as a coupling agent (elastomeric white filler) in rubber compositions based on isoprene elastomer(s) comprising a white filler as reinforcing filler. The invention also relates to the isoprene elastomer compositions obtained by using the said coupling agent, and to elastomeric articles with a body comprising the abovementioned compositions. The coupling agent is especially a compound which comprises a POS containing identical or different units of formula: math-cwu id="MATH-US-00001" NUMBER1/NUMBER MATH MTABLE MTR MTD MTABLE MTR MTD MROW MSUB MROW MO(/MO MSUP MIR/MI MN2/MN /MSUP MO)/MO /MROW MIa/MI /MSUB MO/MO MSUB MIY/MI MIb/MI /MSUB MO/MO MSUB MIX/MI MIc/MI /MSUB MO/MO MISiO/MI /MROW /MTD MTD MSTYLE MTEXT /MTEXT /MSTYLE /MTD /MTR MTR MTD MSTYLE MTEXT /MTEXT /MSTYLE /MTD MTD MFRAC MROW MN4/MN MO-/MO MROW MO(/MO MROW MIa/MI MO+/MO MIb/MI MO+/MO MIc/MI /MROW MO)/MO /MROW /MROW MN2/MN /MFRAC /MTD /MTR /MTABLE /MTD MTD MROW MO(/MO MII/MI MO)/MO /MROW /MTD /MTR /MTABLE /MATH mathematica-file id="MATHEMATICA-00001" file="US20040059049A1-20040325-M00001.NB"/ image id="EMI-M00001" wi="216.027" he="30.9582" file="US20040059049A1-20040325-M00001.TIF" imf="TIFF" ti="MF"/ /MATH-CWU in which (1) R2 is a monovalent hydrocarbon-based group; (2) Y represents an OH or an alkoxy; (3) X is a function comprising an activated ethylenic double bond chosen in particular from a maleimide, an isomaleimide, a maleamic acid, a maleamic ester and an acrylamide function; (4) a=0, 1, 2 or 3, b=0, 1, 2 or 3 and c=0 or 1, the sum a+b+c is other than 0 and =3; (5) the content of function Y is =0.8%; (6) the content of functions X is =0.4% (content=number of functions per 100 Si atoms).