Generally, the amount of hydrolysis and {HEAD ~ condensation} desired is {TAIL ~ that amount} which will result in a copolymer having the desired viscosity and the desired alkoxy content 
Generally , the amount of hydrolysis and { HEAD ~ condensation } desired is { TAIL ~ that amount } which will result in a copolymer having the desired viscosity and the desired alkoxy content
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH