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