| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for providing high molecular weight polyoxamide resin even under a condition that an initial temperature during mixing of oxalic acid diester and diamine is low and heat medium temperature increase rate is reduced.SOLUTION: In a manufacturing method of a polyoxamide resin having a process of pressure polymerization in a presence of alcohol generated by a reaction of diamine and oxalic acid diester, a temperature when the oxalic acid diester is injected into preset diamine is 170°C or less, a heat medium temperature increase rate at that time is 10°C/15 minutes or less, and X calculated by X=F/M is 0.16 to 0.50 inclusive, where M (kg) is weight of the preset diamine and F (L/minutes) is a feed speed of injected oxalic acid diester at 23°C.SELECTED DRAWING: None |
