Use of an amphiphilic block copolymers as adhesion promoters of film-forming aqueous compositions on a low-energy surface

The use as claimed in one of the preceding claims, characterized in that the block copolymer employed is such that its hydrophilic block (h) is composed, at least in part, of monomer units selected from:

• unsaturated ethylenic mono- and dicarboxylic acids, such as acrylic acid, methacrylic acid, itaconic acid, maleic acid or fumaric acid,
• monoalkyl esters of the above unsaturated ethylenic dicarboxylic acids, preferably with C1-C4 alcohols, and their N-substituted derivatives, such as, for example, 2-hydroxyethyl acrylate or methacrylate,
• amides of unsaturated carboxylic acids, such as acrylamide or methacrylamide, or
• ethylenic monomers comprising a ureido group, such as ethylene urea ethyl methacrylamide or ethylene urea ethyl methacrylate, or
• ethylenic monomers comprising at least one hydrogen phosphate or phosphonate group, such as vinylphosphonic acid or vinylidenephosphonic acid, or
• phosphated acrylates or methacrylates of polyethylene glycol or phosphated acrylates or methacrylates of polypropylene glycol, or
• ethylenic monomers comprising a sulfonic acid group or one of its alkali metal or ammonium salts, such as, for example, vinylsulfonic acid, vinylbenzenesulfonic acid, α-acrylamiddmethyl-propanesulfonic acid or 2-sulfoethylene methacrylate, or
• cationic monomers selected from aminoalkyl (meth)acrylates or aminoalkyl(meth)acrylamides;
• monomers comprising at least one secondary, tertiary or quaternary amine functional group or a heterocyclic group comprising a nitrogen atom, vinylamine or ethyleneimine;
• diallyldialkyl-ammonium salts;
• these monomers being taken alone or as mixtures, and in the form of salts, the salts preferably being selected such that the counterion is a halide, such as, for example, a chloride, or a sulfate, a hydrosulfate, an alkyl sulfate (for example comprising 1 to 6 carbon atoms), a phosphate, a citrate, a formate or an acetate, such as methylaminoethyl (meth)acrylate, dimethylaminopropyl (meth)acrylate, di(tert-butyl)aminoethyl (meth)acrylate, dimethyl-aminomethyl(meth)acrylamide or dimethylamino-propyl(meth)acrylamide;
• ethyleneimine, vinylamine, 2-vinylpyridine or 4-vinylpyridine;
• trimethyl-ammonium ethyl (meth)acrylate chloride, trimethylammonium ethyl acrylate methyl sulfate, benzyldimethylanmonium ethyl (meth)acrylate chloride, 4-benzoylbenzyldimethylammonium ethyl acrylate chloride, trimethylarmonium ethyl (meth)acrylamido chloride or (vinylbenzyl)-trimethylammonium chloride;
• diallyldimethyl-ammonium chloride, alone or as mixtures, or their corresponding salts, or
• poly(vinyl alcohol), for example resulting from hydrolysis of a poly(vinyl acetate), or
• cyclic amides of vinylamine, such as N-vinylpyrrolidone, or
• a hydrophilic monomer originating from a chemical modification of a hydrophobic block, for example by hydrolysis of a poly(alkyl acrylate) to acrylic acid.

The use as claimed in one of the preceding claims, characterized in that the block copolymer employed is such that its hydrophobic block (H) is composed, at least in part, of monomer units selected from:

• styrene-derived monomers, such as styrene, α-methylstyrene, para-methylstyrene or para-(tert-butyl)styrene, or
• esters of acrylic acid or of methacrylic acid with optionally fluorinated C1-C12, preferably C1-C8, alcohols, such as, for example, methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, t-butyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate or isobutyl methacrylate,
• vinyl nitriles comprising from 3 to 12 carbon atoms and in particular acrylonitrile or methacrylonitrile,
• vinyl esters of carboxylic acids, such as vinyl acetate, vinyl versatate or vinyl propionate,
• vinyl halides, for example vinyl chloride, and
• diene monomers, for example butadiene or isoprene.