C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 118/08 (2006.01) C08F 18/04 (2006.01) C08F 118/04 (2006.01) C08F 218/04 (2006.01) C08F 220/00 (2006.01)
Patent
CA 2321372
The present invention is directed to 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°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°C (T60°C) to the emulsion viscosity at 20°C (T20°C), T60°C/T20°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.
Inomata Naokiyo
Tanimoto Seiji
Kirby Eades Gale Baker
Kuraray Co. Ltd.
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