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