Catalyzed degradation of thermoplastic polyolefins and...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 11/10 (2006.01) C08F 8/50 (2006.01) C08J 11/12 (2006.01) C08L 95/00 (2006.01)

Patent

CA 2233418

The invention relates to a process for the degradation of thermoplastic polyolefins, specifically high or medium-density polyethylenes, using as a catalyst a mineral solid containing copper or a mineral solid containing aluminum and silicon and being acidic at a temperature of 200 to 450 C, the degradation being accompanied by the incorporation of degradation products into a heavy hydrocarbon, such as a bituminous base. The incorporation of degraded thermoplastic polyolefins, specifically degraded high or medium density polyethylenes, into heavy hydrocarbons produces compositions that can be used in industrial and road applications.

On décrit un procédé de dégradation de polyoléfines thermoplastiques, notamment de polyéthylènes haute ou moyenne densité, utilisant comme catalyseur un solide minéral contenant du cuivre ou un solide minéral contenant de l'aluminium et du silicium et présentant un caractère acide, à une température de 200 à 450 °C, la dégradation étant accompagnée de l'incorporation des produits de dégradation dans un hydrocarbure lourd, tel qu'une base bitume. L'incorporation de polyoléfines thermoplastiques dégradées, en particulier de polyéthylènes haute ou moyenne densité dégradés, à des hydrocarbures lourds permet d'obtenir des compositions utilisables dans des applications industrielles et routières.

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