Patent ID: 8152986

Claim:
Method for forming a copolymer organic film on an electrically conductive or semi-conductive surface by electrolysis of an electrolyte solution until the said copolymer organic film is grafted on the said surface, the said method being characterized in that: a) the electrolyte solution contains: i) at least one protic solvent, ii) at least one aryl diazonium salt as primer for radical polymerization, the said aryl diazonium salt being soluble in the said protic solvent, iii) at least one radically polymerizable monomer having a solubility in the protic solvent lower than 0.1 M, and iv) at least one non-ionic surfactant selected from the group consisting of polyethoxylated surfactants and polyols, b) the electrolysis of the electrolyte solution is carried out with a reducing potential at least equal to the reducing potential of the said primer, and the working potential being at maximum greater than 5% of the potential value of reduction of the primer and no more cathodic than −0.8 V.