LIQUID CONCENTRATE OF SOLID PARTICLES OF HYBRID PIGMENTS CONTAINING GRAFT COPOLYMERS AND THE USE THEREOF FOR THE PREPARATION OF PAINTS IN AQUEOUS AND / OR ORGANIC MEDIA

摘要

The invention concerns a liquid concentrate of pigments of mineral and organic hybrid solid particles of 0.5 to 2 μm, comprising a copolymer consisting of: 1/ 5 to 40 wt.% of anchor sequence(s) consisting of a linear copolymer formed from at least a/ a first monomer with a basic nitrogenous group introduced from one or more compound(s) chosen from the vinylpyridines and preferably aminoalkyl (meth)acrylate, and b/ a second monomer of the anchor sequence is formed from an ethylenic monomer comprising an aromatic group, the weight content of said first monomer relative to said second monomer being between 40 and 60 wt.%, and 2/ 25 to 90 wt.% of so-called hydrophobic sequence(s) obtained from a polymer-substituted ethylenic macromonomer of which the monomer units comprise -COOR10 groups in which R10 is an optionally substituted C1-C10 alkyl, preferably a C2-C8 alkyl optionally substituted by a hydroxyl, and 3/ 5 to 70 wt.% of hydrophilic sequence(s) obtained from an ethylenic macromonomer substituted by a hydrophilic sequence comprising a polyethylene glycol sequence (a) substituted by an alkoxy end group or (b) connected to a polypropylene glycol sequence.