| 摘要 |
<p>Provided is an aqueous emulsion comprising, as the dispersant, a polyvinyl alcohol containing from 1 to 15 mol% of ethylene units in the molecule and having a degree of hydrolysis of at least 95 mol%, and, as the dispersoid, a vinyl ester polymer. The aqueous emulsion is characterized in that, when its film is immersed in water at 20 DEG C for 24 hours, the degree of water solubility of the film is at most 1.5 %, and the degree of water absorption of the film is at most 30 %, and that the ratio of the emulsion viscosity at 60 DEG C (T60 DEG C) to the emulsion viscosity at 20 DEG C (T20 DEG C), T60 DEG C/T20 DEG C is at most 2. The aqueous emulsion has good high-temperature viscosity stability (that is, this depends little on ambient temperatures and has good high-temperature storage stability), and has improved water resistance and improved low-temperature storage stability.</p> |
