Durable thermosetting powder coating compositions

China Patent

PATENT NO 108570277
APP PUB NO CN-108570277-A
SERIAL NO

201810417421

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Abstract

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The present invention relates to a thermosetting powder coating composition comprising a first resin which is an acid functional polyester resin having an acid value below 50mg KOH/g and a second resin obtainable by reacting a hydroxy functional component comprising a component having 2 hydroxy functional groups per molecule and/or a component having at least 3 hydroxy functional groups per molecule and an acid functional component comprising a component having 2 acid functional groups per molecule and/or a component having at least 3 acid functional groups per molecule, wherein: -more than 90 mol% of all hydroxyl-functional components in the second resin are derived from neopentyl glycol (NPG), and-6 to 11 mol% of all hydroxyl-functional components and acid-functional components in the second resin are derived from hydroxyl-functional components and/or acid-functional components having at least 3 functional groups per molecule.

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