| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high-purity ethyleneimine polymer that has low discoloration, a slight change of discoloration with time and a narrow molecular weight distribution and is compatible with industrially required quality standards. <P>SOLUTION: The method for producing an ethyleneimine polymer includes, in the production of an ethyleneimine polymer by polymerizing ethyleneimine, performing polymerization while changing the atmosphere of a gas phase part during polymerization into an inert gas atmosphere having a low oxygen concentration and keeping the reaction solution temperature and the temperature of a heat medium for removing the reaction heat in specific ranges. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
