Abstract:

In this paper, the influence of supercritical CO2 on acrylic acid resin was characterized by viscosity-average molar mass method and FT-IR.The concentration change was investigated, using GC, on n-butyi acetate and dibutyl ester solution sample under the effect of supercritical CO2，and the partial mole volume of n-butyi acetate was measured at different pressures and 338K. The result indicated that the character of acrylic acid resin and other components in acrylic acid coating are not changed by SC-CO2，and n-butyi acetate, as active solvent, can improve the solubility of SC-CO2 in acrylic acid coating, which can more effectually reduce the viscosity of coating solution. Moreover, it is feasible to take dibutyl ester solution as plasticizer.