Cathodic electrocoating composition containing morpholine...

Details Cathodic electrocoating composition containing morpholine... Cathodic electrocoating composition containing morpholine...

C - Chemistry, Metallurgy

08

G

C08G 18/80 (2006.01) C08G 18/28 (2006.01) C08G 18/58 (2006.01) C09D 5/44 (2006.01)

Patent

CA 2489155

An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a polyisocyanate crosslinking agent; wherein the improvement is the use of a polyisocyanate crosslinking agent having at least one crosslinkable morpholine dione group per molecule. Electrodeposited finishes are formed that have reduced volatile emissions and film weight loss when heated to cure.

L'invention concerne une composition aqueuse, cathodique pour revêtement électrolytique contenant un liant d'un adduit d'époxy-amine et un agent de réticulation de polyisocyanate. L'invention est caractérisée en ce qu'on utilise un agent de réticulation de polyisocyanate présentant un groupe dione morpholine réticulable par molécule. Les finitions électrodéposées sont formées et présentent des émissions volatiles et une perte de poids pelliculaire réduites, lorsqu'elles sont chauffées pour durcir.

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