a curing agent selected from {HEAD ~ the class} consisting of aminoplast resins, {TAIL ~ phenoplast resins}, blocked or semiblocked polyisocyanates 
consisting of
a curing agent selected from { HEAD ~ the class } consisting of aminoplast resins , { TAIL ~ phenoplast resins } , blocked or semiblocked polyisocyanates
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH