PROCESS FOR THE PREPARATION OF POLYESTERS WITH HIGH RECYCLE CONTENT
Disclosed is a process for producing copolyesters with high levels of recycled content. Scrap or post-consumer poly(ethylene terephthalate) is depolymerized by methanolysis or glycolysis to produce a purified, recycled dimethyl terephthalate which can be repolymerized with 2 or more diols. The polye...
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Format | Patent |
Language | English French |
Published |
21.02.2013
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Abstract | Disclosed is a process for producing copolyesters with high levels of recycled content. Scrap or post-consumer poly(ethylene terephthalate) is depolymerized by methanolysis or glycolysis to produce a purified, recycled dimethyl terephthalate which can be repolymerized with 2 or more diols. The polyesters of this invention have physical properties and an appearance that is similar to polyesters prepared from virgin monomers. In addition to dimethyl terephthalate, the polyesters can be prepared from recycled ethylene glycol recovered from depolymerization of poly(ethylene terephthalate) and/or 1,4-cyclo-hexanedimethanol prepared by hydro genation of recycled dimethyl terephthalate or recovered from depolymerized polyester mixtures.
La présente invention concerne un procédé d'élaboration de copolyesters à teneur élevée en produits de recyclage. Les déchets de PET, c'est-à-dire de polyéthylène téréphtalate, ou le PET issu de la collecte de recyclage, sont dépolymérisés par méthanolyse ou gylcolyse de façon à produire un diméthyl-téréphtalate qui est repolymérisé avec au moins 2 diols. Les polyesters de cette invention présentent des propriétés et un aspect semblables à ceux des polyesters élaborés à partir de monomères vierges. Les polyesters peuvent être élaborés, non seulement à partir du diméthyl-téréphtalate, mais aussi de l'éthylène-glycol recyclé issu de la dépolymérisation du PET et/ou de 1,4-cyclohexane-diméthanol obtenu par hydrogénation de diméthyl-téréphtalate recyclé ou récupéré dans des mélanges de polyesters dépolymérisés. |
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AbstractList | Disclosed is a process for producing copolyesters with high levels of recycled content. Scrap or post-consumer poly(ethylene terephthalate) is depolymerized by methanolysis or glycolysis to produce a purified, recycled dimethyl terephthalate which can be repolymerized with 2 or more diols. The polyesters of this invention have physical properties and an appearance that is similar to polyesters prepared from virgin monomers. In addition to dimethyl terephthalate, the polyesters can be prepared from recycled ethylene glycol recovered from depolymerization of poly(ethylene terephthalate) and/or 1,4-cyclo-hexanedimethanol prepared by hydro genation of recycled dimethyl terephthalate or recovered from depolymerized polyester mixtures.
La présente invention concerne un procédé d'élaboration de copolyesters à teneur élevée en produits de recyclage. Les déchets de PET, c'est-à-dire de polyéthylène téréphtalate, ou le PET issu de la collecte de recyclage, sont dépolymérisés par méthanolyse ou gylcolyse de façon à produire un diméthyl-téréphtalate qui est repolymérisé avec au moins 2 diols. Les polyesters de cette invention présentent des propriétés et un aspect semblables à ceux des polyesters élaborés à partir de monomères vierges. Les polyesters peuvent être élaborés, non seulement à partir du diméthyl-téréphtalate, mais aussi de l'éthylène-glycol recyclé issu de la dépolymérisation du PET et/ou de 1,4-cyclohexane-diméthanol obtenu par hydrogénation de diméthyl-téréphtalate recyclé ou récupéré dans des mélanges de polyesters dépolymérisés. |
Author | LANGE, DAVID MILTON MOSKALA, ERIC JON SEYMOUR, ROBERT WILLIAM PECORINI, THOMAS JOSEPH |
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DocumentTitleAlternate | PROCÉDÉ D'ÉLABORATION DE POLYESTERS À TENEUR ÉLEVÉE EN PRODUITS DE RECYCLAGE |
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Snippet | Disclosed is a process for producing copolyesters with high levels of recycled content. Scrap or post-consumer poly(ethylene terephthalate) is depolymerized by... |
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SubjectTerms | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP |
Title | PROCESS FOR THE PREPARATION OF POLYESTERS WITH HIGH RECYCLE CONTENT |
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