Process for the manufacture of an epoxy-functional polyester, epoxy-functional polyester obtained by such process and coating composition comprising such epoxy-functional polyester

Matthew Unthank (Inventor), Ian Marchant Jackson (Inventor), Barry Gordon Thompson (Inventor)

Research output: Patent

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Abstract

The present invention relates to a process for the manufacture of an epoxy- functional polyester. The process according to the invention comprises the steps of a)providing a polyester having functional groups selected from hydroxyl groups and carboxylic acid groups, or mixtures thereof, b)reacting the functional groups of the polyester with an epihaloalkane to obtain an epoxy- functional polyester dissolved in a liquid phase, c) optionally adding an organic solvent to the liquid phase obtained in step b); d) precipitating the epoxy- functional polyester from the liquid phase obtained in step b) or in step c); and e) isolating the precipitated epoxy-functional polyester from the liquid phase by a solid-liquid separation technique. The thus obtained resin is in particular useful for use in powder coatings. The invention further relates to a solid epoxy- functional polyester obtainable by such process and to a coating composition, in particular a powder coating composition, comprising such solid epoxy-functional polyester.
Original languageEnglish
Patent numberWO2018011103A1
Priority date13/07/16
Publication statusPublished - 18 Jan 2018

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