Powder-coating compositions containing transfer...

Details Powder-coating compositions containing transfer... Powder-coating compositions containing transfer...

C - Chemistry, Metallurgy

09

D

C09D 5/03 (2006.01)

Patent

CA 2351495

This invention relates to a powder-coating composition made from at least two components comprising: (a) a film-forming resin composition; and (b) a transfer efficiency-enhancing amount of at least one additive compound comprising a 5- or 6-membered ring, the ring atoms of the ring comprising at least two heteroatoms; one heteroatom being nitrogen, the second heteroatom being selected from the group consisting of nitrogen, oxygen, and sulfur; said compound having at least one hydrocarbyl substituent of 1 to about 50 carbon atoms; wherein component (B) is incorporated into the powder coating composition by addition of component (B) to an extruded composition comprising components other than component (B). The invention also relates to a method of coating a substrate using the foregoing powder coating composition.

La présente invention concerne une composition de poudrage formée d'au moins deux composants comprenant: (a) une composition de résine filmogène; et (b) au moins un composé d'addition dans une quantité augmentant l'efficacité de transfert, cette composition d'addition comprenant un cycle à 5 ou 6 chaînons, les atomes cycliques du cycle comprenant au moins deux hétéroatomes. L'un des hétéroatomes est constitué par de l'azote et le deuxième hétéroatome est sélectionné dans le groupe formé par de l'azote, de l'oxygène et du soufre; le composé selon l'invention contient au moins un substituant hydrocarbyle comprenant 1 à 50 atomes de carbone. On incorpore le composant (B) dans la composition de poudrage en ajoutant le composant (B) à une composition extrudée comprenant des composants autres que le composant (B). L'invention concerne également un procédé de peinture d'un substrat par utilisation de la composition de poudrage selon l'invention.

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