A method for processing polyester wastes

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 11/06 (2006.01) C08L 67/02 (2006.01)

Patent

CA 2485818

A method for processing polyester wastes, es-pecially used polyester bottles, which comprises shred-ding, washing, drying and melting the waste mixture to obtain a starting raw material wherein a modifying agent selected from the group comprising a combination of polysiloxane and a plasticizer selected from the group of phthalates, or a combination of silazanes and silanes is added to the shredded and dried waste mixture, the amount of the modifying agent being 4 to 6 % by weight, based on the waste mixture.

L'invention concerne un procédé permettant de traiter de manière spécifique du matériel en polyester, tels que des récipients en polyester usagés. Ce procédé consiste à écraser, laver, sécher et faire fondre un mélange de déchets afin d'obtenir une source de matériel en polyester caractérisé en ce que le mélange écrasé et séché de déchets du matériel en polyester est constitué par 4 à 6 % en poids sur la totalité du mélange de déchets d'un agent de modification choisi dans le groupe constitué soit d'une combinaison de polysiloxane et d'un plastifiant choisi dans le groupe des phtalates, soit d'une combinaison de silazanes et de silanes.

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