Method for improving the aging resistance of the sidewalls...

Details Method for improving the aging resistance of the sidewalls... Method for improving the aging resistance of the sidewalls...

C - Chemistry, Metallurgy

08

J

C08J 7/00 (2006.01) B29D 30/54 (2006.01) C08J 7/04 (2006.01)

Patent

CA 2069983

A method for improving the aging resistance of the sidewalls of retreaded tires is provided. The method involves the steps of treating the surface of the sidewalls of the worn tire to be retreaded with an aqueous solution or dispersion containing a film-forming polymer and an antiozonant, retreading the treated tire and then curing the treated retreaded tire thereby causing the antioxidant to migrate into the inner portion of the sidewall. The method of the invention is particularly useful for improving the aging resistance of the sidewalls of worn truck and bus tires which are conventionally retreaded several times.

L'invention concerne une méthode visant à améliorer la résistance au vieillissement des parois latérales de pneus rechapés. La méthode consiste en les étapes suivantes : traiter la surface des parois latérales du pneu usé à rechaper avec une solution ou une dispersion aqueuse contenant un polymère filmogène et un antiozonant, rechaper le pneu traité et sécher le pneu traité rechapé pour induire la migration de l'antioxydant dans la partie intérieure de la paroi latérale. La méthode de l'invention est particulièrement utile pour améliorer la résistance au vieillissement des parois latérales de pneus usés de camions et d'autobus qui sont habituellement rechapés plusieurs fois.

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