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

Akzo Nobel Coatings International B.V.; Unthank, Matthew; Jackson, Ian; Thompson, Barry (2018) Process for the manufacture of an epoxy-functional polyester, epoxy-functional polyester obtained by such process and coating composition comprising such epoxy-functional polyester. WO2018011103A1.

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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.

Item Type: Patent
Subjects: F200 Materials Science
J400 Polymers and Textiles
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Becky Skoyles
Date Deposited: 14 Jun 2018 10:42
Last Modified: 14 Jun 2018 10:42
URI: http://nrl.northumbria.ac.uk/id/eprint/34531

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