A process for producing solution of high-molecular weight...

Details A process for producing solution of high-molecular weight... A process for producing solution of high-molecular weight...

C - Chemistry, Metallurgy

08

L

C08L 33/24 (2006.01) C08G 18/02 (2006.01)

Patent

CA 2086198

Abstract The present invention provides a process for produc- ing a high-molecular weight polycarbodiimide solution by subjecting an aliphatic diisocyanate to decarboxylation and condensation reaction in the presence of a carbodiimidiza- tion catalyst, in which process a halogen-containing solvent or a mixed solvent thereof is used as the polymerization solvent, the monomer concentration is 15% by weight or less, and the reaction temperature is 80°C or above.

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