Rubber composition for tyre running tread

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/103 (2006.01) B60C 1/00 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2410156

The invention concerns a crosslinkable or crosslinked rubber composition for use to produce a running tread of a tyre casing, and a tyre casing incorporating said running tread. The inventive rubber composition is based on: at least one or several diene elastomers, and a plasticizing agent including a glycerol oleic acid triester, and is such that said plasticizing agent comprises: in accordance with a mass fraction ranging between 45 % and 100 %, one or several compounds not extracted from petroleum, synthetic and/or natural, which include at least a glycerol fatty acid triester, such that the assembly formed by the fatty acid(s) comprise said oleic acid in a mass fraction not less than 60 %; and in a mass fraction ranging between 55 % and 0 %, one or several plasticizing oils derived from petroleum, of the paraffin, aromatic, naphthene type. The invention is particular applicable to tyre casings of the passenger vehicle type.

La présente invention concerne une composition de caoutchouc réticulable ou réticulée qui est utilisable pour constituer une bande de roulement d'une enveloppe de pneumatique, et une enveloppe de pneumatique incorporant cette bande de roulement. Une composition de caoutchouc selon l'invention est à base d'au moins : un ou plusieurs élastomères diéniques, et un plastifiant comprenant un triester d'acide oléique de glycérol, et elle est telle que ledit plastifiant comprend : selon une fraction massique allant de 45% à 100%, un ou plusieurs composés non extraits du pétrole, synthétiques et/ou naturels, qui comprennent au moins un triester d'acide gras de glycérol, de telle manière que l'ensemble constitué par le ou les acides gras comprenne ledit acide oléique selon une fraction massique égale ou supérieure à 60% et selon une fraction massique allant de 55% à 0%, une ou plusieurs huiles plastifiantes extraites du pétrole, de type paraffinique, aromatique ou naphténique. L'invention s'applique notamment à des enveloppes de pneumatique de type tourisme.

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