| abstract |
(57) Abstract: A high molecular weight polycarbodiimide solution polymerized in an aromatic hydrocarbon solvent is stably stored. SOLUTION: The polycarbodiimide solution after the completion of the polymerization reaction is added to the reaction solution by using any compound represented by the following general formula (1), (2) or (3) or a mixture thereof as a stabilizer. Provided is a method for stabilizing a polycarbodiimide solution, which prevents addition of polycarbodiimide from the polycarbodiimide solution and maintains the solution state for a long time by adding. Embedded image (In the formula, R 1 is hydrogen, an alkyl group, an aryl group, an alkoxyl group or a phenoxyl group, R 2 is hydrogen, a halogen or an alkyl group, R 3 is hydrogen, a halogen or an alkyl group, X represents a halogen or nitrile group, and n represents an integer of 4-8. ) |