Effect of hydrophilization of surface of PVC particles on their water dispersion stability

The results of studies on the effect of oxyethylenated surfaces of PVC on the water dispersion stability of particles are presented. The hydrophilizating agent introduced into PVC particles was ethylene polyoxide glycol with molecular weights from 400 to 6000. Non-ionic surfactants such as oxyethylenated oleinic acid, oxyethylenated plant oil, oxyethylenated lauryl alcohol and oxyethylenated saturated aliphatic alcohol were used as stabilizers of PVC particles in water. It was found that the aqueous dispersions of PVC plastisol with the best stability were obtained when polyethylenoxide glycol with molecular weight of 6000 was applied as hydrophilizating agent and oxyethylenated oleic acid or oxyethylenated saturated aliphatic alcohol as stabilizer. In these cases, stability is highest because the highest number of hydrogen bonds are formed that decided about the formation of an adsorbed film around the dispersed particle.