Process for the preparation of carbodiimides

C - Chemistry – Metallurgy – 07 – C

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204/91.19

C07C 209/80 (2006.01) C07D 213/643 (2006.01) C07D 213/74 (2006.01) C07D 295/13 (2006.01)

Patent

CA 1310608

Process for the preparation of carbodiimides Abstract The photooxidation of N,N'-substituted thioureas with oxygen in the pre- sence of an acid-trapping agent gives N,N'-substituted carbodiimides. The carbodiimides can be converted into cyanoguanidines, which are suit- able as latent curing agents for epoxy resins.

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