said {HEAD ~ reaction product} having {TAIL ~ unreacted carboxylic acid groups} which are neutralizable with base to form anionic salt groups 
having
said { HEAD ~ reaction product } having { TAIL ~ unreacted carboxylic acid groups } which are neutralizable with base to form anionic salt groups
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH