Polymerisation of Aliphatic Polyamides

The nylon 66 salt is prepared by reacting the hexamethylenediamine and adipic acid in boiling methanol, the comparatively insoluble salt (melting point 190-191°C) precipitating out. 

The polymerisation casting of nylon 6 in situ in the mould has been developed in recent years. Anionic polymerisation is normally employed a typical system uses as a catalyst 0.1-1 mol.% of acetic caprolactam and 0.15-0.50 mol.% of the 

---