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