It was tried to prepare the thermosensitive microcapsules containing the water soluble solid powder by the melting dispersion cooling method and to establish the optimum preparation conditions. As a model water solubl...It was tried to prepare the thermosensitive microcapsules containing the water soluble solid powder by the melting dispersion cooling method and to establish the optimum preparation conditions. As a model water soluble solid powder, sodium hydrogen carbonate was adopted in order to generate carbon dioxide gas and as a thermosensitive shell material, olefin resin with the melting point of ca. 40°C was used. In the experiment, the concentration of olefin resin in the shell material solution was mainly changed together with the concentrations of the oil soluble surfactant species and the α-tocopherol as a modifier of shell. Addition of α-tocopherol into the shell material solution could prevent the core from breaking away during the microencapsulation process and result in the higher microencapsulation efficiency, because the dispersion stability of solid powder in the shell material solution could be increased due to the increase in affinity between the shell material solution and solid powder. Also, the microencapsulation efficiency increased with the concentration of olefin resin, became maximum at 50 wt% and then, decreased. The microcapsules were found to begin melting at 36°C and to generate carbon dioxide gas.展开更多
为提高热敏CTP(Compute To Plate)版材的显影性和成像性,合成了一种新型阻溶促溶酚醚树脂。通过红外光谱、GPC及1H-NMR对其结构进行了表征。从催化剂、溶剂、反应温度、反应时间及反应物的物质的量比这5个方面对该反应进行了研究,得到...为提高热敏CTP(Compute To Plate)版材的显影性和成像性,合成了一种新型阻溶促溶酚醚树脂。通过红外光谱、GPC及1H-NMR对其结构进行了表征。从催化剂、溶剂、反应温度、反应时间及反应物的物质的量比这5个方面对该反应进行了研究,得到了最佳合成条件:1,2-二氯乙烯为溶剂,氨基磺酸作催化剂,乙烯基乙醚与酚羟基物质的量比为3∶1,反应温度40℃,反应时间12 h。将新型阻溶促溶酚树脂用于热敏CTP版材,其综合成像性能优良。展开更多
文摘It was tried to prepare the thermosensitive microcapsules containing the water soluble solid powder by the melting dispersion cooling method and to establish the optimum preparation conditions. As a model water soluble solid powder, sodium hydrogen carbonate was adopted in order to generate carbon dioxide gas and as a thermosensitive shell material, olefin resin with the melting point of ca. 40°C was used. In the experiment, the concentration of olefin resin in the shell material solution was mainly changed together with the concentrations of the oil soluble surfactant species and the α-tocopherol as a modifier of shell. Addition of α-tocopherol into the shell material solution could prevent the core from breaking away during the microencapsulation process and result in the higher microencapsulation efficiency, because the dispersion stability of solid powder in the shell material solution could be increased due to the increase in affinity between the shell material solution and solid powder. Also, the microencapsulation efficiency increased with the concentration of olefin resin, became maximum at 50 wt% and then, decreased. The microcapsules were found to begin melting at 36°C and to generate carbon dioxide gas.
文摘为提高热敏CTP(Compute To Plate)版材的显影性和成像性,合成了一种新型阻溶促溶酚醚树脂。通过红外光谱、GPC及1H-NMR对其结构进行了表征。从催化剂、溶剂、反应温度、反应时间及反应物的物质的量比这5个方面对该反应进行了研究,得到了最佳合成条件:1,2-二氯乙烯为溶剂,氨基磺酸作催化剂,乙烯基乙醚与酚羟基物质的量比为3∶1,反应温度40℃,反应时间12 h。将新型阻溶促溶酚树脂用于热敏CTP版材,其综合成像性能优良。
