Acetophenone oxime-blocked pu powder coatings and their use

Details Acetophenone oxime-blocked pu powder coatings and their use Acetophenone oxime-blocked pu powder coatings and their use

C - Chemistry, Metallurgy

09

D

C09D 175/04 (2006.01) B05D 3/02 (2006.01) C08G 18/80 (2006.01) C09D 5/03 (2006.01)

Patent

CA 2213547

Disclosed is a storage-stable, heat-curable polyurethane powder coating composition comprising: a) at least one polyisocyanate component blocked totally or partially with acetophenone oxime, b) a hydroxyl-containing polymer, and c) if required appropriate auxiliaries or additives. The powder coating composition may be cured at a temperature, for example 160-180°C, lower than that employed in prior art.

Composition de revêtement à base de poudre de polyuréthane, thermoréticulable et stable au stockage, renfermant : a) au moins une composante de polyisocyanate, totalement ou partiellement bloquée avec une acétophénone- oxime, b) un polymère hydroxylé, c) si nécessaire, les produits auxiliaires ou les additifs appropriés. La composition de revêtement pulvérulente peut être réticulée à une température, par exemple dans une plage de 160-180 degrés C, inférieure à celle utilisée antérieurement.

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