Cathodic electrocoating compositions containing hydroxyl-carbonate blocked polyisocyanate crosslinking agent

   
   

An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent; wherein the improvement is the use of a hydoxyl-carbonate blocked polyisocyanate crosslinking agent. Electrodeposited finishes are formed that have reduced weight loss when heated to cure.

Una composición electrocoating catódica acuosa mejorada que tiene una carpeta de una aducción de la de epoxy-amina y un polyisocyanate bloqueado que reticulan el agente; en donde la mejora es el uso de un polyisocyanate bloqueado hydoxyl-carbonato que reticula el agente. Se forman los finales de Electrodeposited que han reducido pérdida del peso cuando están calentados para curar.

 
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