Rubber based product, method for obtaining same and method...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 21/00 (2006.01) B60C 1/00 (2006.01) C08K 5/07 (2006.01) C08K 5/098 (2006.01)

Patent

CA 2310129

The invention concerns a rubber based product, comprising at least one buffer zone for trapping oxygen external to said product so as to protect from oxidation at least one sensitive zone of said product, said or each buffer zone containing a composition based on at least one elastomer comprising at least one iron (III) salt for activating oxidation in said composition. The invention is characterised in that said salt belongs to the group consisting of iron (III) acetylacetonate and carboxylic acids iron (III) salts corresponding to the formula: Fe(CnH2nO2)3 in which n ranges between 6 and 23. Said product is obtained by incorporating by mechanical work said salt in the elastomer or elastomers contained in said composition, for said buffer zone. The invention is particularly useful in a tyre cover providing improved rolling resistance.

La présent invention concerne un produit à base de caoutchouc, du type comportant au moins une zone tampon prévue pour piéger l'oxygène extérieur audit produit en vue de protéger de l'oxydation au moins une zone sensible dudit produit, ladite ou chaque zone tampon contenant une composition à base d'au moins un élastomère qui comprend au moins un sel de fer (III) prévu pour activer l'oxydation dans ladite composition, caractérisé en ce que ledit sel appartient au groupe constitué par l'acétylacétonate de fer (III) et par les sels de fer (III) d'acides carboxyliques répondant à la formule: Fe(C n H2n O2)3 où n est compris entre 6 et 23. Ce produit est obtenu en incorporant par travail mécanique ledit sel à l'élastomère ou aux élastomères que comprend ladite composition, pour ladite zone tampon. L'invention est avantageusement mise en oeuvre dans une enveloppe de pneumatique et confère une résistance au roulement améliorée.

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