Liquid concentrate of mineral fillers containing grafted polymers and their use for preparing paints in aqueous and/or organic medium

Liquid concentrate of colourless mineral fillers which can be used to manufacture paints containing an aqueous or organic solvent of said mineral fillers and a grafted copolymer containing at least three sequences of different chemical nature, among which at least one anchoring sequence able to be absorbed on solid particles consisting of said mineral fillers, at least one sequence of a hydrophobic nature and at least one sequence of a hydrophilic nature, characterized in that it comprises a dry extract of said mineral fillers of 65% or more by weight of said liquid concentrate, and said copolymer is made up of:

• 1/ 5 to 40 weight %, preferably 15 to 35 weight % and further preferably 20 to 30% weight % of said anchoring sequence(s) consisting of a linear copolymer formed from at least two separate monomer units containing:
• a first ethylene monomer unit comprising at least one basic nitrogenous group preferably chosen from among —NH2, —NH—, —NHR, —NR2, —CONH2, —CONHR, R representing a C1-C6 alkyl radical, and from heterocyclic groups,
• a second unsaturated ethylene monomer unit comprising an aromatic group, preferably a phenyl,
• the weight content of said first monomer units relative to said second monomer units being 40 to 60%, preferably approximately 50%.
• 2/ 25 to 90 weight %, preferably 40 to 80 weight %, further preferably 50 to 70 weight % of said hydrophobic sequence(s) containing organosoluble polymers, and
• 3/ 5 to 70 weight %, preferably 15 to 30 weight %, further preferably 10 to 20 weight % of hydrophilic sequences, containing water-soluble polymers.