CROSSLINKING COMPONENTS FOR ELECTROCOAT COMPOSITIONS, ELECTROCOAT COMPOSITIONS, AND PROCESSES FOR FORMING A LAYER OF AN ELECTROCOAT COMPOSITION ON A SURFACE OF A SUBSTRATE

摘要

A crosslinking component for electrocoat compositions is provided. The crosslinking component contains a blocked polyisocyanate. The blocked polyisocyanate includes at least three blocked isocyanate groups. A blocking agent for the blocked polyisocyanate contains from about 25 to about 75 mol % alcohols (A) comprising 4 carbon atoms or less, and from about 25 to about 75 mol % alcohols (B) comprising 5 carbon atoms or more and containing one or more ether groups. An electrocoat composition containing the crosslinking component and a process for forming a layer of an electrocoat composition on a surface of a substrate also are provided.