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AssigneeCarbios
InventorsMarie-Laure Desrousseaux, Helene Texier, Sophie Duquesne, Alain Marty, Mediha Aloui Dalibey, Michel Chateau
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The present invention relates to processes for degrading plastic products and the uses thereof. The processes of the invention particularly comprise a step of amorphizing a plastic product prior to a step of depolymerization. The processes of the invention are particularly useful for degrading a plastic product comprising polyethylene terephthalate and/or polylactic acid. The invention also relates to a method of producing monomers and/or oligomers from a plastic product comprising at least one polyester, particularly polyethylene terephthalate and/or polylactic acid, comprising submitting the plastic product both to an amorphization step and to a depolymerization step.
A process for degrading a plastic product comprising at least one semi-crystalline thermoplastic polyester comprising the steps of:
A method of producing monomers and/or oligomers from a plastic product containing at least one semi-crystalline thermoplastic polyester, comprising submitting the plastic product to an amorphization step to amorphize at least partially said semi-crystalline thermoplastic polyester of the plastic product, wherein the amorphization step comprises heating the plastic product to a temperature above the crystallization temperature (Tc) of said semi-crystalline thermoplastic polyester and further cooling the product to a temperature below the glass transition temperature (Tg) of said semi-crystalline thermoplastic polyester, and to a depolymerizing step to depolymerize said at least partially amorphized polyester of the plastic product.
A process for degrading a plastic product comprising at least one semi-crystalline thermoplastic polyester that has been previously amorphized by heating the plastic product to a temperature above the crystallization temperature (Tc) of said semi-crystalline thermoplastic polyester and cooling the plastic product to a temperature below the glass transition temperature (Tg) of said semi-crystalline thermoplastic polyester comprising contacting said amorphized plastic product with a depolymerase able to degrade said previously amorphized polyester.
Dependencies are inferred from the claim text.