Traditional solvent based coating needs a lot of quick volatile organic solvent which is volatile into the atmosphere as spraying,so it pollutes environment badly.Because supercritical CO_2 has particular solvent capability and can swell polymer,it can take place of quick volatile organic solvent to reduce the coating viscosity in order to decrease the environmental pollution as spraying.Entrusted by Fujian Donghai Coating Company we exploit supercritical CO_2 spraying of acrylic acid coating.The text is el...