Actualy, adhesion to glass is the whole thing. Although silane groups replacing hydroxyls will decreace watersolubility. In another study, I replaced all of the OH with silane . The resulting polymer was totaly insoluble in water. The Kuraray polymer is fairly easy to disolve in NEAR BOILING water. So there must be relatively few silanes, relative to hydroxyls.
Originally Posted by T-grain
Unlike gelatin, a PVA based emulsion dose not "set up". It must be alowed to dry.