Conversion of Contaminated Post-Consumer Polyethylene Terephthalate into a Thermoset Alkyd Coating Using Biosourced Monomers

Bradley Thomas,  Nicole D. A. Lopez, James Railton, Jamal Bousbaa, Justin J. B. Perry, Matthew G. Unthank*

*Corresponding author for this work

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Abstract

The synthesis of a high-performance oxidative cross-linked thermoset alkyd coating is described that utilizes a novel recycling strategy from contaminated postconsumer waste polyethylene terephthalate (wPET). A single-stage “depolymerization-repolymerization” process has been developed that allows the exploitation of a waste stream from a commercial PET recycling process with 95% efficiency, which, when copolymerized with glycerol and tall oil fatty acid, delivers a sustainable fatty acid-functional polyester suitable for use in thermoset alkyd coatings. Physical drying challenges have been tackled via the development of a convergent polymer formulation strategy from a single source of wPET and the formulation of the resulting fatty acid-functional polymers with commercial alkyd driers, delivering a thermoset alkyd coating suitable for industrial applications.

Original languageEnglish
Pages (from-to)6485-6493
Number of pages9
JournalACS Applied Materials and Interfaces
Volume12
Issue number17
Early online date18 Apr 2024
DOIs
Publication statusPublished - 29 Apr 2024

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