METHOD FOR PREPARING AN AQUEOUS POLYACRYLATE EMULSION FOR PROTECTING METAL SURFACE AGAINST CORROSION AND PRE-LUBRICATION THEREOF AND RESULTING EMULSION

摘要

The invention concerns a method comprising steps which consist in: preparing an organic mixture comprising oil, monomers selected among acrylic acid -and methacrylic acid esters and at most 25 % of an acrylic or methacrylic monomer having an acid, amide, amine or epoxy group; placing said mixture in mini-emulsion in an aqueous phase in the presence of a co-solvent, preferably of the polyalkylene glycol type; copolymerising said monomers in emulsion. When said emulsion is applied in a thin coating on a metal surface, it provides simultaneously a dry appearance, efficient protection and pre-lubricating effect.