Method for recycling plastics and use thereof

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 11/00 (2006.01)

Patent

CA 2610576

The invention relates to a method for recycling plastics containing at least two polymers, copolymers or blends of the latter, based on polystyrene. A solvent for the polymers, copolymers or blends is added to the plastic. Precipitation is then carried out by the addition of an appropriate precipitant, to separate the gelatinous precipitation product from the other constituents of the plastic. The method is used in the recycling of any type of plastics, in particular plastics obtained from the processing of electronic scrap and from shredder residues.

L'invention concerne un procédé de recyclage de matières plastiques, contenant au moins deux polymères à base de polystyrène, copolymères ou mélanges de ces derniers. Selon ledit procédé, la matière plastique est mélangée avec un solvant pour les polymères, copolymères ou mélanges de ces derniers. Ensuite, une précipitation est mise en oeuvre par l'ajout d'un précipitant adéquat, de sorte que le produit de la précipitation sous forme de gel peut être ensuite séparé des autres constituants de la matière plastique. Ce procédé trouve son application dans le recyclage de n'importe quelles matières plastiques, en particulier de matières plastiques provenant de fractions légères de déchiquetage et du traitement de la ferraille électronique.

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