Colour rubber composition for tyre

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/13 (2006.01) C08K 5/3435 (2006.01) C08K 5/3475 (2006.01) C08K 5/372 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2295872

The invention concerns a white, light-coloured or colour tyre rubber composition devoid of carbon black, comprising at least a diene elastomer, a reinforcing white or coloured filler, an anti-photooxidation protective system, characterised in that said protective system is based at least on: (A) a 2,2'-methylene-bis-[4-alk yl(C¿1?-C¿10?)-6-alkyl(C¿1?-C¿12?)phenol]; (B) a dialkylthiodipropionate whereof the alkyl radicals, identical or different are (C¿1?-C¿30?), preferably (C¿8?-C¿20?), radicals; (C) a 2-(2-hydroxyphenyl)benzotriazole; (D) a "HALS" amine derived from 2,2,6,6-tetramethylpiperidine.

Composition de caoutchouc de pneumatique blanche, claire ou colorée et dépourvue de noir de carbone, comportant au moins un élastomère diénique, une charge renforçante blanche ou colorée, un système de protection anti-photo- oxydant, caractérisée en ce que ledit système de protection est à base d'au moins: (A) un 2,2'-méthylène-bis-[4-alkyle(C1 à C10)-6-alkyle(C1 à C12)phénol]; (B) un dialkylthiodipropionate dont les radicaux alkyles, identiques ou différents, sont des radicaux en C1 à C30, de préférence en C8 à C20; (C) un 2-(2-hydroxyphényl)benzotriazole; (D) une amine "HALS" dérivée de la 2,2,6,6-tétraméthylpipéridine.

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