| abstract |
The present invention relates to a gel medium comprising at least one non-aqueous solvent; a crosslinked polymer resulting from the reaction of : a polyfunctional polymer containing at least two carboxyl moieties capable of undergoing crosslinking reactions, said polyfunctional polymer having a molecular weight from 2,000 g/mol to 3,000,000 g/mol, preferably from 10,000 to 1,000,000 g/mol, more preferably from 25,000 g/mol to 400,000 g/mol and a crosslinking agent chosen from a polycarbodiimide or a polyaziridine. |