The primary class of compounds employed are {TAIL ~ ethylene oxide derivatives}, nonionic polysaccharides and under certain specified conditions {HEAD ~ anionic polysaccharides} 
The primary class of compounds employed are { TAIL ~ ethylene oxide derivatives } , nonionic polysaccharides and under certain specified conditions { HEAD ~ anionic polysaccharides }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD