PROCESS FOR THE PREPARATION OF ETHYLENE/CHLOROTRIFLUOROETHYLENE POLYMER MEMBRANES

摘要

The invention relates to a process for the production of membranes based on ethylene/chlorotrifluoroethylene polymers having a melting temperature not exceeding 200°C. The process relies on the diffusion induced phase separation of the ethylene/chlorotrifluoroethylene polymer from a solution and comprises the steps of providing a solution comprising an ethylene/chlorotrifluoroethylene polymer having a melting temperature not exceeding 200°C in a solvent; casting the polymer solution into a film; immersing the film in a non-solvent bath to precipitate the polymer. Membranes made of compositions comprising an ethylene/chlorotrifluoroethylene polymer having a melting temperature not exceeding 200°C and at least one second polymer are also disclosed.