Thermosetting powder paints

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 5/03 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2614681

Thermosetting coloured powder paints to be used in electrostatic painting processes are described. These powder paints comprise not more than 30% by weight of at least one monochromatic pigment coated with at least one aldehyde and/or ketone resin, preferably 5 to 30% by weight, and up to 95% by weight of conversion agent, preferably 70 to 95% by weight; more than 90% of the particles of said at least one coated monochromatic pigment and said conversion agent have a particle size of between 10 and 40 microns, preferably between 15 and 35 microns. The coated monochromatic pigment and the conversion agent have the same specific weight which is between 1.3 and 1.7 g/cc.

L'invention concerne des peintures en poudre colorée thermodurcissable destinées à une utilisation dans des procédés de peinture électrostatiques. Ces peintures en poudre comprennent au plus 30 % en poids d'au moins un pigment monochromatique enduit d'au moins une résine cétone et/ou aldéhyde, de préférence de 5 à 30 % en poids, et au plus 95 % en poids d'un agent de conversion, de préférence de 70 à 95 % en poids, plus de 90 % des particules dudit ou desdits pigments monochromatiques enduits et dudit agent de conversion ayant une taille de particules comprise entre 10 et 40 microns, de préférence entre 15 et 35 microns. Le pigment monochromatique enduit et l'agent de conversion ont le même poids spécifique compris entre 1,3 et 1,7 g/cc.

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