Process for decomposing a polymer to its monomer or monomers

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 69/54 (2006.01) C07C 4/22 (2006.01) C07C 11/02 (2006.01) C07C 15/46 (2006.01) C07C 17/367 (2006.01) C07C 21/185 (2006.01) C07C 51/09 (2006.01) C07C 63/26 (2006.01) C07C 67/00 (2006.01) C07C 67/333 (2006.01) C08F 8/50 (2006.01) C08F 10/10 (2006.01) C08F 12/06 (2006.01) C08F 14/26 (2006.01) C08F 20/14 (2006.01) C08J 11/10 (2006.01)

Patent

CA 2261726

A process for decomposing a polymer which is capable of undergoing thermal depolymerisation to its monomer or monomers, such as for example poly(methylmethacrylate), and for the recovery of at least one of the monomers, includes the steps of subjecting the polymer in solid, gel, partially molten or molten form to microwave heating for a time and at a temperature sufficient to decompose the polymer to produce the monomer or monomers in gaseous, liquid or solid form, without substantial decomposition of the monomer or monomers, and recovering at least one of the monomer or monomers. The monomer or monomers may then be reused for polymerisation.

Procédé pour décomposer un polymère capable de subir une dépolymérisation thermique, comme par exemple le poly(méthylaméthacrylate), en son ou ses monomère(s), et pour récupérer au moins un des monomères. Ce procédé consiste à soumettre le polymère sous forme solide, gélifiée ou partiellement ou entièrement fondue à un chauffage par micro-ondes pendant une durée et à une température suffisantes pour décomposer le polymère de manière à dégager le ou les monomère(s) sous forme gazeuse, liquide ou solide, sans décomposition notable du ou des monomère(s), et à récupérer au moins un des monomères. Le ou les monomère(s) peuvent alors être réutilisé(s) pour la polymérisation.

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