Electrodepositable coating compositions and their use in a...

Details Electrodepositable coating compositions and their use in a... Electrodepositable coating compositions and their use in a...

C - Chemistry, Metallurgy

08

G

C08G 18/80 (2006.01) C08G 18/32 (2006.01) C08G 18/58 (2006.01) C08G 18/65 (2006.01) C08G 18/70 (2006.01) C09D 5/44 (2006.01)

Patent

CA 2294320

In accordance with the present invention, an electrodepositable composition and a method of electrodeposition using the composition are provided. The electrodepositable composition comprises (a) an active hydrogen-containing, cationic salt group-containing resin electrodepositable on a cathode; (b) a capped polyisocyanate curing agent; and optionally, (c) a metal-containing catalyst. The capped polyisocyanate curing agent comprises a polyisocyanate at least partially capped with a material having structure (I): (see formula I) wherein n is a number of 1 to 10; m is a number of 1 to 10 and R is hydrogen or an alky or aryl group or substituted alkyl or aryl group having from about 1 to about 30 carbon atoms.

L'invention concerne une composition appliquée par électrodéposition ainsi qu'un procédé d'électrodéposition utilisant cette composition. La composition pour électrodéposition comprend (a) une résine active contenant de l'hydrogène et un groupe sel cationique pouvant être électrodéposée sur une cathode; (b) un agent de traitement polyisocyanate coiffé; et éventuellement, (c) un catalyseur contenant du métal. L'agent de traitement polyisocyanate coiffé comprend un polyisocyanate coiffé au moins en partie avec un matériau présentant la structure (I), dans laquelle n est un nombre de 1 à 10; m est un nombre de 1 à 10 et R est l'hydrogène ou un groupe alkyle ou aryle ou un groupe alkyle ou aryle substitué possédant environ 1 à 30 atomes de carbone.

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