Stable powder coating compositions which produce consistent...

Details Stable powder coating compositions which produce consistent... Stable powder coating compositions which produce consistent...

C - Chemistry, Metallurgy

08

G

C08G 18/46 (2006.01) C08G 18/80 (2006.01) C09D 167/02 (2006.01) C09D 175/06 (2006.01)

Patent

CA 2387978

The invention provides powder coatings that consistently produce durable finishes when cured, and are stable when uncured. These powder coatings of the invention include film forming systems. The film forming system, in turn, includes a polymer component and a crosslinker component. The polymer component includes a polyester polyol. This polyester polyol includes the reaction product of a cycloaliphatic component and a polyfunctional isocyanurate component. The crosslinker component which can be used when practicing certain embodiments of this invention includes a polyfunctional isocyanate compound which is at least partially blocked with at least one of the following: a polyhydroxy aromatic compound and a hydroxy-functional ester compound.

L'invention concerne des revêtements en poudre qui forment de manière constante des finis durables après traitement, et sont stables avant traitement. Ces revêtements en poudre comprennent des systèmes filmogènes. Le système filmogène comprend à son tour un constituant polymère et un constituant de réticulation. Le constituant polymère comprend un polyol de polyester. Ce polyol de polyester comprend le produit de réaction d'un constituant cycloaliphatique et d'un constituant d'isocyanurate polyfonctionnel. Le constituant de réticulation pouvant être utilisé dans certaines formes de réalisation de l'invention comprend un composé d'isocyanate polyfonctionnel qui est au moins partiellement séquencé à l'aide d'un composé aromatique polyhydroxy et/ou d'un composé d'ester hydroxy-fonctionnel.

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