Kaolin clay in silica tread compounds

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 3/34 (2006.01) B60C 1/00 (2006.01) C08K 3/36 (2006.01) C08K 5/54 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2241619

The invention relates to a method for decreasing dynamic modulus without decreasing hardness in silica tread compounds in tires made in accordance with this method. The tread composition comprises an elastomer including a performance-enhancing package comprising silica, carbon black and a silica replacement. The replacement replaces up to about 40 percent by weight of the silica and yet maintains one or more selected performance properties as if the performance enhancement package were pure carbon black and silica. The replacement is kaolin clay present in conjunction with a silane coupling agent. In the method of the present invention kaolin clay is used as a replacement for about 5 to about 20 parts, by weight, of silica in the compounding of silica tread compounds.

Cette invention concerne une méthode pour réduire le module dynamique sans réduire la dureté de la bande de roulement de pneus fabriquées à l'aide de composés à la silice. La composition de la bande de roulement comprend un élastomère renfermant un mélange d'amélioration de la performance à base de silice, de noir de carbone et d'un produit de remplacement de la silice. Ce dernier remplace jusqu'à environ 40 %, en poids, de la silice, tout en maintenant une ou plusieurs caractéristiques de performance choisies, qui seraient obtenues si le mélange d'amélioration de la performance était uniquement à base de noir de carbone et de silice. Ce produit de remplacement est du kaolinton, présent simultanément avec un agent de couplage du silane. Dans cette méthode, le kaolinton est utilisé pour remplacer d'environ 5 à environ 20 parties, en poids, de silice lors du mélange des produits siliceux de la bande de roulement.

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