PAINT COMPOSITION

Abstract

The invention relates to an aqueous coating preparation composition combining a binding agent and an organic, organometallic, or mineral pigment dispersed by means of an itaconic acid polymer. The invention also relates to a dispersing agent comprising this polymer and a coating method that implements the aqueous composition according to the invention.

Description

Title of the invention: PAINT COMPOSITION

[0001] The invention relates to an aqueous coating preparation composition combining a binding agent and an organic, organometallic, or mineral pigment dispersed by means of an itaconic acid polymer. The invention also relates to a dispersing agent comprising this polymer and to a coating method that implements the aqueous composition according to the invention.

[0002] Compositions comprising a binder and a pigment dispersed with a dispersing agent for the preparation of paint compositions are known.

[0003] In general, methods for preparing paint compositions must be efficient and allow for good viscosity control. Viscosity drift phenomena must be controlled because they can lead to a change in texture that would make handling or application difficult or even impossible. Similarly, sedimentation of mineral particles must be avoided or significantly slowed down. In addition to stability control, viscosity control of paint compositions is therefore also essential. Thus, the stability of mineral compositions is a key characteristic during their preparation, as well as during their transport and storage. It is therefore necessary for these compositions to have improved stability.

[0004] Apart from stability, controlling the rheology, particularly the viscosity, of paint compositions is also an essential property, both during their preparation and during their application. It is also necessary to improve the stability of these compositions during their shelf life.

[0005] Controlling the rheology, in particular the viscosity, of these compositions also allows for easier use of these compositions.

[0006] The fineness of the ground pigments used in paints is also important because coarse pigment particles generally reduce the properties of a paint, including the uniformity and opacity of colors.

[0007] Within aqueous compositions, the polymers used should develop significant interactions with the mineral matter particles.

[0008] Finally, from an environmental point of view, it is important to be able to have polymers prepared from reagents of renewable or natural origin, in particular reagents of plant origin.

[0009] Known compositions do not always offer the properties necessary to solve these problems. Therefore, improved coating preparation compositions are needed. The composition according to the invention allows to provide a solution to all or part of the problems of prior art compositions.

[0010] Thus, the invention provides an aqueous coating preparation composition R comprising: - at least one water-soluble polymer P, having a molecular mass Mw, measured by CES, ranging from 1,000 g / mol to 50,000 g / mol, and prepared by a radical polymerization reaction in water, of at least one compound Ml selected from itaconic anhydride, itaconic acid, sodium itaconate, potassium itaconate, lithium itaconate, ammonium itaconate, calcium itaconate, magnesium itaconate and their combinations, - at least one organic, organometallic or mineral pigment Q and - at least one binding agent B.

[0011] Preferably for the composition R according to the invention, the polymer P has a molecular mass Mw, measured by CES, ranging from 1,200 g / mol to 50,000 g / mol or from 1,200 g / mol to 40,000 g / mol. More preferably, the polymer P has a molecular mass ranging from 1,200 g / mol to 25,000 g / mol or from 1,200 g / mol to 20,000 g / mol; more preferably from 1,500 g / mol to 20,000 g / mol; even more preferably from 1,500 g / mol to 15,000 g / mol; much more preferably from 1,500 g / mol to 10,000 g / mol; particularly preferably from 1,500 g / mol to 8,000 g / mol.

[0012] Preferably for composition R according to the invention, polymer P has a polymolecularity index IP, measured by CES, of less than 5.5, preferably less than 4.5, more preferably less than 4 or 3.5.

[0013] Also preferably, the polymer P has a polymolecularity index IP, measured by CES, ranging from 1.6 to 5.5, preferably ranging from 1.6 to 4.5 or from 1.6 to 3.5.

[0014] According to the invention, polymer P can be totally or partially neutralized. Preferably, polymer P can be neutralized by means of an ion selected from a monovalent ion, a divalent ion, and combinations thereof, more preferably by means of an ion selected from K+, Na+, Li+, NH4+, Mg2+, Ca2+, and combinations thereof. Also preferably, polymer P can be totally or partially neutralized by means of at least one compound selected from LiOH, NaOH, KOH, Zn(OH)2, Mg(OH)2, Ca(OH)2, ZnO, MgO, CaO, ammonium derivatives, ammonia, amino bases, for example triethanolamine, aminomethylpropanol, diethanolisopropylamine, or 2-amino-2-methylpropanol (AMP), and combinations thereof, more preferably NaOH, Ca(OH)2, CaO, and combinations thereof.

[0015] According to the invention, the polymer P is prepared by a radical polymerization reaction in water of at least one compound Ml. Preferably for the method according to the invention, the polymerization reaction involves a A combination of itaconic acid and an itaconate, preferably a combination of itaconic acid and an itaconate selected from sodium itaconate, potassium itaconate, lithium itaconate, and ammonium itaconate. Also preferably, the polymerization reaction involves a combination of itaconic acid and an itaconate in a molar ratio of itaconic acid / itaconate ranging from 80 / 20 to 20 / 80, more preferably ranging from 45 / 55 to 55 / 45.

[0016] Preferably according to the invention, compound Ml does not comprise an ester group; in particular, compound Ml is not an itaconic acid ester, especially an itaconic acid diester. Besides compound Ml, polymer P can also be prepared using at least one other compound different from compound Ml, preferably from 0.5% by weight to 30% by weight of another compound relative to the total weight of monomers.

[0017] Thus, polymer P can also be prepared using another compound selected from: * a compound M2 selected from acrylic acid, methacrylic acid, an acrylic acid oligomer, a methacrylic acid oligomer, an acrylic acid salt, a methacrylic acid salt, an acrylic acid oligomer salt, a methacrylic acid oligomer salt, maleic acid, maleic anhydride, crotonic acid, 2-acrylamido-2-methylpropane sulfonic acid, a salt of 2-acrylamido-2-methylpropane sulfonic acid, ethoxymethacrylate sulfonic acid, sodium methallyl sulfonate, styrene sulfonate, phosphated hydroxyethyl acrylate, phosphated hydroxyethyl methacrylate, phosphated hydroxypropyl acrylate, phosphated hydroxypropyl methacrylate, phosphated hydroxybutyl acrylate, phosphated hydroxybutyl methacrylate and their combinations; * a compound M3 independently selected from CrCi2 esters of methacrylic acid, C1-C12 esters of acrylic acid, acrylamide, N-tert-butylacrylamide, alkylacrylamides, N-methylolacrylamide, acrylonitrile, vinyl-lactam, N-vinylpyrrolidone, ureidomethacrylate, hydroxyethylacrylate, hydroxyethylmethacrylate, hydroxypropylacrylate, hydroxypropylmethacrylate, hydroxybutylmethacrylate, hydroxybutylacrylate, caprolactone methacrylate, caprolactone acrylate, polycaprolactone methacrylate, polycaprolactone acrylate, lactame methacrylate, lactame acrylate, polycaprolactame methacrylate, polycaprolactame acrylate, vinyl acetate and combinations thereof; preferably CrC8 esters of methacrylic acid, Ci-C8 esters of acrylic acid and combinations thereof; preferably, N-tert-butylacrylamide, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, methylacrylate, ethylacrylate, propylacrylate, butylacrylate, more preferably, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate and their combinations.

[0018] According to the invention, the polymerization reaction is carried out in the presence of an initiating compound, preferably an initiating compound selected from a peroxide (e.g. hydrogen peroxide, tert-butyl hydroperoxide), a persalt, preferably a persulfate (e.g. sodium persulfate, ammonium persulfate, potassium persulfate), their combinations and their associations with optionally a metallic salt, preferably a metallic salt selected from an iron salt (e.g. Fe11 or Fe111), a copper salt (e.g. Cu1 or Cu11) and their combinations.

[0019] The polymerization reaction can also be carried out in the presence of at least one sulfur compound Tl comprising sulfur in oxidation state IV (sulfur IV or SIV). Preferably, compound Tl is selected from lithium hydrogen sulfite, sodium hydrogen sulfite, potassium hydrogen sulfite, ammonium hydrogen sulfite, calcium di(hydrogen sulfite), magnesium di(hydrogen sulfite), and combinations thereof. Preferably, compound Tl is used in an amount of 0.5% to 15% by weight, preferably 1% to 10% by weight, and more preferably 1.5% to 8% by weight, relative to the total dry weight of monomers used in the polymerization reaction.

[0020] The polymerization reaction can also be carried out in the presence of at least one phosphorus compound T2 comprising phosphorus in oxidation state I (phosphorus I or P1) or comprising phosphorus in oxidation state III (phosphorus III or P111). Preferably, compound T2 is selected from hypophosphorous acid, sodium hypophosphite, ammonium hypophosphite, phosphorous acid, sodium phosphite, and ammonium phosphite. Preferably, compound T2 is used in an amount of 0.5% to 15% by weight, preferably 1% to 10% by weight, and more preferably 1.5% to 8% by weight, relative to the total dry weight of monomers used in the polymerization reaction.

[0021] The composition R according to the invention comprises at least one pigment Q, which may be an organic pigment, an organometallic pigment, or a mineral pigment. Preferably, the composition R comprises one pigment Q or two or three pigments Q.

[0022] According to the invention, the pigment Q can be synthetic or of natural origin. Preferably, the pigment Q is selected from alkaline earth metal carbonate, preferably calcium carbonate (natural calcium carbonate or precipitated calcium carbonate), strontium carbonate, magnesium carbonate, carbonate Barium, dolomite, kaolin, titanium dioxide, silica, talc, lime, magnesium hydroxide, calcium sulfate, barium sulfate, iron oxide, carbon black, cadmium sulfide, clays, silicates, mica, chromium oxides, zinc oxide, zinc molybdate, zinc chromate, lead silicochromate, barium metaborate, and their combinations. The preferred Q pigment is calcium carbonate.

[0023] According to the invention, the pigment Q can be in the form of particles, preferably particles whose median size, measured by sedimentation, is less than 50 pm or a median size ranging from 0.05 pm to 50 pm or to 20 pm or a median size less than 10 pm or to 5 pm or to 2 pm.

[0024] Essentially, the composition R according to the invention comprises at least one binding agent B, preferably a binding agent B which is a sterically modified binding compound. Preferably according to the invention, the binding agent B is selected from polyvinyl acetate resins, polyvinyl acetate latex, methyl methacrylate resins, methyl methacrylate latex, acrylic resins, acrylic latex, vinylacrylic resins, vinylacrylic latex, vinyl-versatate resins, vinyl-versatate latex, styrenic resins, styrenic latex, styrene-acrylic resins, styrene-acrylic latex, linseed oil resins, rapeseed oil resins and combinations thereof.

[0025] The aqueous composition R according to the invention allows for the preparation of a coating. Preferably, the composition R according to the invention is an ink composition, a varnish composition, an adhesive composition, or a paint composition, for example, decorative or industrial paint. More preferably, the composition R comprises: - from 0.1% to 4% by dry weight of polymer P, - from 3% to 65% by dry weight of pigment Q, - 9.9% to 15% by dry weight of binding agent B, - from 19.9% ​​to 88% water by weight.

[0026] Also preferably, composition R comprises: - from 0.1% to 4% by dry weight of polymer P, - 3% to 30% by dry weight of pigment Q, -from 5% to 70% by dry weight of binding agent B, - from 26.9% to 82.9% by weight of water.

[0027] According to the invention, the composition R may also include at least one agent selected from a particle spacer, a steric stabilizer, an electrostatic stabilizer, an opacifying agent, a coloring agent, a dispersing agent different from polymer P, a solvent, a coalescing agent, an antifoaming agent, a preservative, a biocidal agent, a spreading agent, a thickening agent, a film-forming copolymer and mixtures thereof.

[0028] The invention also provides a method for preparing an aqueous composition R according to the invention, comprising mixing in water and under agitation: - at least one water-soluble polymer P, - at least one organic, organometallic or mineral pigment Q and - at least one binding agent B.

[0029] The invention also provides a method for controlling the viscosity of a composition R according to the invention comprising the addition of at least one polymer P in an aqueous composition comprising at least one organic, organometallic or mineral pigment Q and at least one binding agent B.

[0030] The polymer P according to the invention makes it possible to effectively control the properties of the composition R. Generally, according to the invention, the polymer P is used in an aqueous medium and preferably in combination with water. Thus, the invention also provides an aqueous agent G comprising at least one polymer P for controlling the viscosity of an aqueous composition R according to the invention.

[0031] Preferably, the aqueous agent G according to the invention also comprises at least one solvent, in particular a coalescing solvent, for example glycol, butyl glycol, butyldiglycol, monopropylene glycol, ethylene glycol, ethylenediglycol, "Dowanol" products of which CAS number is 34590-94-8, "Texanol" products of which CAS number is 25265-77-4; or combined with at least one additive selected from an amphiphilic compound, in particular a surfactant compound, preferably a hydroxylated surfactant compound, for example alkyl-polyalkylene glycol, in particular alkyl-polyethylene glycol and alkyl-polypropylene glycol; a polysaccharide derivative, for example cyclodextrin, cyclodextrin derivative, polyethers, alkyl-glucosides; a hydrotropic compound, an antifoaming agent, a biocidal agent and combinations thereof.

[0032] According to the invention, the particular, advantageous or preferred characteristics of the composition R according to the invention and of its method of preparation define aqueous agents G and methods of using the composition R and of the agent G according to the invention which are also particular, advantageous or preferred.

[0033] The various aspects of the invention can be illustrated by the following examples. The methods or techniques implemented are known or described. EXAMPLES

[0034] Preparation and characterization of polymers P according to the invention. Preparation of polymer PI according to the invention.

[0035] In a glass reactor, 207 g of itaconic acid (compound Ml) are introduced, and 127.38 g of a 50 wt% aqueous sodium hydroxide solution are added. The reaction is exothermic, the reactor temperature is maintained at 97°C ± 2°C, and then 0.04 g of iron(II) sulfate heptahydrate and 10 g of deionized water are introduced.

[0036] In a first beaker, 27.3 g of hydrogen peroxide in a 35 wt% solution and 21 g of deionized water are weighed out. In a second beaker, 25 g of sodium bisulfite in a 40 wt% aqueous solution are weighed out.

[0037] The reagents from the two beakers are introduced in parallel into the reactor for 2 hours, and the temperature is maintained at 97°C ± 2°C. Then, 150 g of deionized water is added, and the mixture is allowed to cool to room temperature. The resulting composition, CPI, comprises the PI copolymer according to the invention at 46.3% by weight of dry extract, the composition and characteristics of which are detailed in Table 1. Preparation of polymer P2 according to the invention

[0038] In a glass reactor, 207 g of itaconic acid (compound Ml) are introduced, and 127.39 g of a 50 wt% aqueous sodium hydroxide solution are added. The reaction is exothermic, the reactor temperature is maintained at 97°C + / -2°C, and then 0.009 g of copper sulfate pentahydrate and 10 g of deionized water are introduced.

[0039] In a first beaker, 27.3 g of hydrogen peroxide in a 35% wt. solution are weighed out. In a second beaker, 25 g of sodium bisulfite in a 40% wt aqueous solution are weighed out.

[0040] The reagents from the two beakers are introduced in parallel into the reactor for 2 hours, and the temperature is maintained at 97°C ± 2°C. Then, 150 g of deionized water is added, and the mixture is allowed to cool to room temperature. The resulting composition CP2 comprises the copolymer P2 according to the invention at 48.1% by weight of dry extract, the composition and characteristics of which are detailed in Table 1. Preparation of polymer P3 according to the invention

[0041] In a glass reactor, 207 g of itaconic acid (compound Ml) are introduced, and 127.39 g of a 50 wt% aqueous sodium hydroxide solution are added. The reaction is exothermic, the reactor temperature is maintained at 97°C + / -2°C, and then 0.019 g of copper sulfate pentahydrate and 10 g of deionized water are introduced.

[0042] In a first beaker, 27.3 g of hydrogen peroxide in a 35% wt. solution are weighed out. In a second beaker, 25 g of sodium bisulfite in a 40% wt aqueous solution are weighed out.

[0043] The reagents from the two beakers are introduced in parallel into the reactor for 2 hours, and the temperature is maintained at 97°C ± 2°C. Then, 150 g of deionized water is added, and the mixture is allowed to cool to room temperature. The resulting composition, CP3, comprises the P3 copolymer according to the invention at 48.1% by weight of dry extract, the composition and characteristics of which are detailed in Table 1. Preparation of polymer P4 according to the invention

[0044] In a glass reactor, 207 g of itaconic acid (compound Ml) and 210 g of deionized water are introduced, followed by 127.39 g of a 50 wt% aqueous sodium hydroxide solution. The reaction is exothermic, and the reactor temperature is maintained at 100°C ± 2°C under reduced pressure to distill 200 g of water. The temperature is then cooled to 97°C, and 0.028 g of copper(II) sulfate pentahydrate is added.

[0045] In a first beaker, 27.3 g of hydrogen peroxide in a 35 wt% solution and 27 g of deionized water are weighed out. In a second beaker, 15 g of sodium bisulfite in a 40 wt% aqueous solution are weighed out.

[0046] The reagents from the two beakers are introduced in parallel into the reactor for 2 hours, and the temperature is maintained at 97°C ± 2°C. Then, 250 g of deionized water is added, and the mixture is allowed to cool to room temperature. The resulting composition, CP4, comprises the P4 copolymer according to the invention at 37.6% by weight of dry extract, the composition and characteristics of which are detailed in Table 1. Preparation of polymer P5 according to the invention

[0047] In a glass reactor, 207 g of itaconic acid (compound Ml) are introduced, and 127.38 g of a 50 wt% aqueous sodium hydroxide solution are added. The reaction is exothermic, the reactor temperature is maintained at 90°C ± 2°C, and then 21 g of deionized water are introduced.

[0048] In a first beaker, 10.3 g of sodium persulfate and 21 g of deionized water are weighed.

[0049] The reagents from the beaker are introduced all at once into the reactor, and the temperature is maintained at 90°C ± 2°C for 2 hours. Then, 150 g of deionized water is added, and the mixture is allowed to cool to room temperature. The P5 polymer solution is neutralized to pH 7.4 by adding 50 wt% sodium hydroxide to the water. The resulting composition, CP5, comprises the P5 polymer according to the invention at 47.0 wt% dry extract, the composition and characteristics of which are detailed in Table 1. Preparation of polymer P6 according to the invention

[0050] In a glass reactor, 207 g of itaconic acid (compound Ml) are introduced, and 127.39 g of a 50 wt% aqueous sodium hydroxide solution are added. The reaction is exothermic, the reactor temperature is maintained at 90°C ± 2°C, and then 0.008 g of iron(II) sulfate heptahydrate diluted in 10 g of deionized water is introduced all at once.

[0051] In a first beaker, 27.3 g of hydrogen peroxide in a 35 wt% solution and 27 g of deionized water are weighed out. In a second beaker, 25 g of sodium bisulfite in a 40 wt% aqueous solution are weighed out.

[0052] The reactants from the two beakers are introduced in parallel into the reactor for 2 hours and the temperature is maintained at 90°C ± 2°C for 1 hour. Then, 150 g of deionized water is added and the mixture is allowed to cool to room temperature.

[0053] The P6 polymer solution is neutralized to pH = 7.9 by adding 50 wt% sodium hydroxide to water. This yields the CP6 composition comprising the P6 polymer according to the invention at 44.4 wt% dry extract, the composition and characteristics of which are detailed in Table 1.

[0054] [tab 1] Composition CPI CP2 CP3 CP4 CP5 CP6 Polymer PI P2 P3 P4 P5 P6 Mw (g / mol) 4,300 2,900 2,500 1,600 6,715 7,415 IP 2.4 2.1 1.9 1.65 3.1 33

[0055] Preparation and characterization of composition s R according to the invention

[0056] The RI to R4 paint compositions according to the invention are prepared from the aqueous compositions CPI to CP4. All the ingredients are mixed under agitation according to the proportions (% by mass) shown in Table 2.

[0057] [tab 2] Ingredients Quantity (g) Deionized water 154.1 -x Aqueous composition CP I to CP4 X NaOH (20% in water) 1 Antifoaming agent "Tego" Foamex 825 ("Evonik") 1 TiOi pigment "Tiona" 568 ("Tronox") 70.2 CaCOs pigment "Omyacarb" 2AV ("Omya") 320.4 CaCOs pigment "Omyacoat" 850OG ("Omya") 210.2 Binder B "Acronal" 8790 ("Basf") 130.1 Coalescing agent MPG 10 Coalescing agent "Texanol" ("Eastman") 10 Thickening agent "Rheotech" 3800 ("Coatex") 8.4 Deionized water 82.6 NaOH (20% in water) 7 Total 1000

[0058] For the RI to R4 paint compositions according to the invention, the Brookfield viscosity, measured at 25°C, at 10 rpm and at 100 rpm (pBkio and pBkioo in rnPa.s), the Stormer viscosity at 25°C, measured at a medium shear gradient (ps in Krebs Units or KU), the Plane Cone viscosity or ICI viscosity at 25°C, measured at a high shear gradient (p, in rnPa.s) were determined: - 24 hours after their preparation, - 8 days after their preparation, after storage at room temperature for 7 days and - 8 days after their preparation, after being stored in an oven at 50°C for 7 days.

[0059] [tab 3] Composition RI R2 R3 R4 Polymer PI p 7 P3 P4 Aqueous Composition Content CP (% dry) 0.2 0.2 0.2 0.2 pH 9 9 9 8.9 T 1 day at 25°C MBklO 10,280 10,160 9,960 9,640 PBklOO 2,780 2,620 2,700 2,590 Us 107 106 108 107 Ul 140 130 140 190 T 8 days (7 days at room temperature) PBklO 10,960 10,080 10,400 10,600 PBklOO 3,090 2,820 2,900 3,050 y? 107 105 105 105 Pi 140 130 140 185 T 8 days (7 days at 50°C) JiBklO 16,900 15,160 15,000 15,700 PBklOO 5,140 4,550 4,500 4,660 Us 129 123 123 127 Mi 150 135 145 190

[0060] The itaconic acid polymers according to the invention, implemented in small quantities, allow good control of the different components of the viscosity of paint compositions.

Claims

Demands

1. Aqueous composition R of coating preparation comprising: - at least one water-soluble polymer P, having a molecular mass Mw, measured by CES, ranging from 1,000 g / mol to 50,000 g / mol, and prepared by a radical polymerization reaction in water, of at least one compound Ml selected from itaconic anhydride, itaconic acid, sodium itaconate, potassium itaconate, lithium itaconate, ammonium itaconate, calcium itaconate, magnesium itaconate and their combinations, - at least one organic, organometallic or mineral pigment Q and - at least one binding agent B.

2. Composition R according to claim 1 for which: - the polymer P has a molecular weight Mw, measured by CES, ranging from 1200 g / mol to 50000 g / mol or from 1200 g / mol to 40000 g / mol; preferably from 1200 g / mol to 25000 g / mol or from 1200 g / mol to 20000 g / mol; more preferably from 1500 g / mol to 20000 g / mol; even more preferably from 1500 g / mol to 15000 g / mol; much more preferably from 1500 g / mol to 10000 g / mol or from 1500 g / mol to 8000 g / mol; or - polymer P has a polymolecularity index IP, measured by CES, of less than 5.5, preferably less than 4.5, more preferably less than 4 or 3.5; or - polymer P has a polymolecularity index IP, measured by CES, ranging from 1.6 to 5.5, preferably ranging from 1.6 to 4.5, more preferably ranging from 1.6 to 3.5;or - the polymer P is totally or partially neutralized, preferably by means of an ion selected from a monovalent ion, a divalent ion and their combinations, more preferably by means of an ion selected from K+, Na+, Li+, NH4+, Mg2+, Ca2+ and their combinations; also preferably, the polymer P is totally or partially neutralized by means of at least one compound selected from LiOH, NaOH, KOH, Zn(OH)2, Mg(OH)2, Ca(OH)2, ZnO, MgO, CaO, ammonium derivatives, ammonia, ammonia, amino bases, for example triethanolamine, aminomethylpropanol, diethanolisopropylamine or 2-amino-2-methylpropanol (AMP) and their combinations, more preferably NaOH, Ca(OH)2, CaO and their combinations.;

3. Composition R according to claim 1 or 2, wherein: - the polymerization reaction involves a combination of itaconic acid and an itaconate, preferably a combination of itaconic acid and an itaconate selected from sodium itaconate, potassium itaconate, lithium itaconate, ammonium itaconate; also preferably a combination of itaconic acid and an itaconate in a molar ratio of an itaconic acid / itaconate combination ranging from 80 / 20 to 20 / 80, preferably ranging from 45 / 55 to 55 / 45; or - polymer P is also prepared using at least one other compound different from compound Ml, preferably from 0.5% by weight to 30% by weight of another compound relative to the total weight amount of monomers; or - Polymer P is also prepared using another compound selected from: * a compound M2 selected from acrylic acid, methacrylic acid, an acrylic acid oligomer, a methacrylic acid oligomer, an acrylic acid salt, a methacrylic acid salt, an acrylic acid oligomer salt, a methacrylic acid oligomer salt, maleic acid, maleic anhydride, crotonic acid, 2-acrylamido-2-methylpropane sulfonic acid, a salt of 2-acrylamido-2-methylpropane sulfonic acid, ethoxymethacrylate sulfonic acid, sodium methallyl sulfonate, styrene sulfonate, phosphated hydroxyethyl acrylate, phosphated hydroxyethyl methacrylate, phosphated hydroxypropyl acrylate, phosphated hydroxypropyl methacrylate, phosphated hydroxybutyl acrylate, phosphated hydroxybutyl methacrylate and their combinations; * a compound M3 independently selected from the following: C1-C12 esters of methacrylic acid, CrCi2 esters of acrylic acid, acrylamide, N-tert-butylacrylamide, alkylacrylamides, N-methylolacrylamide, acrylonitrile, vinyl lactam, N-vinylpyrrolidone, ureidomethacrylate, hydroxyethylacrylate, hydroxyethylmethacrylate, hydroxypropylacrylate, hydroxypropylmethacrylate, hydroxybutylmethacrylate, hydroxybutylacrylate, caprolactone methacrylate, caprolactone acrylate, polycaprolactone methacrylate, polycaprolactone acrylate, lactam methacrylate, lactam acrylate,

4. polycaprolactam methacrylate, polycaprolactam acrylate, vinyl acetate and their combinations; preferably CrC8 esters of methacrylic acid, CrC8 esters of acrylic acid and their combinations;preferably, N-tert-butylacrylamide, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, more preferably, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate and combinations thereof. Composition R according to any one of claims 1 to 3 wherein: - the polymerization reaction uses an initiating compound selected from a peroxide (e.g. hydrogen peroxide, tert-butyl hydroperoxide), a persalt, preferably a persulfate (e.g. sodium persulfate, ammonium persulfate, potassium persulfate), their combinations and their associations with optionally a metal salt, preferably a metal salt selected from an iron salt (e.g. Fe11 or Fe111), a copper salt (e.g. Cu1 or Cu11) and their combinations;or - the polymerization reaction is carried out in the presence of at least one sulfur compound Tl comprising sulfur in oxidation state IV (sulfur IV or SIV), preferably the compound Tl is selected from lithium hydrogen sulfite, sodium hydrogen sulfite, potassium hydrogen sulfite, ammonium hydrogen sulfite, calcium di(hydrogen sulfite), magnesium di(hydrogen sulfite) and their combinations; also preferably, the compound Tl is used in an amount of 0.5% by weight to 15% by weight, preferably 1% by weight to 10% by weight, more preferably 1.5% by weight to 8% by weight, relative to the total dry weight amount of monomers used in the polymerization reaction; or; - The polymerization reaction is carried out in the presence of at least one phosphorus compound T2 comprising phosphorus in oxidation state I (phosphorus I or P1) or comprising phosphorus in oxidation state III (phosphorus III or P111). Preferably, compound T2 is chosen from hypophosphorous acid, sodium hypophosphite, ammonium hypophosphite, phosphorous acid, sodium phosphite, and ammonium phosphite. Also preferably, compound T2 is used in an amount of 0.5% by weight to 15% by weight, preferably 1% by weight to 10% by weight, more preferably 1.5% by weight to 8% by weight, relative to the total dry weight amount of monomers used in the polymerization reaction.

5. Composition R according to any one of claims 1 to 4 wherein: - one pigment Q or two or three pigments Q are used; or - pigment Q is synthetic or of natural origin, preferably pigment Q is selected from alkaline earth metal carbonate, preferably calcium carbonate (natural calcium carbonate or precipitated calcium carbonate), strontium carbonate, magnesium carbonate, barium carbonate, dolomite, kaolin, titanium dioxide, silica, talc, lime, magnesium hydroxide, calcium sulfate, barium sulfate, iron oxide, carbon black, cadmium sulfide, clays, silicates, mica, chromium oxides, zinc oxide, zinc molybdate, zinc chromate, lead silicochromate, barium metaborate and combinations thereof;or - the pigment Q is in the form of particles, preferably particles whose median size, measured by sedimentometry, is less than 50 pm or a median size ranging from 0.05 pm to 50 pm or to 20 pm or a median size less than 10 pm or to 5 pm or to 2 pm.;

6. Composition R according to any one of claims 1 to 5 wherein the binding agent B is a sterically modified binding compound, preferably a binding agent B selected from polyvinyl acetate resins, polyvinyl acetate latex, methyl methacrylate resins, methyl methacrylate latex, acrylic resins, acrylic latex, vinylacrylic resins, vinylacrylic latex, vinyl-versatate resins, vinyl-versatate latex, styrenic resins, styrenic latex, styrene-acrylic resins, styrene-acrylic latex, linseed oil resins, rapeseed oil resins and combinations thereof.

7. Composition R according to any one of claims 1 to 6, preferably an ink composition, varnish composition, adhesive composition, paint composition, for example decorative or industrial paint, comprising: - from 0.1% to 4% by dry weight of polymer P, - from 3% to 65% by dry weight of pigment Q, - from 9.9% to 15% by dry weight of binder B, - from 19.9% ​​to 88% by weight of water; or comprising: - from 0.1% to 4% by dry weight of polymer P, - from 3% to 30% by dry weight of pigment Q, - from 5% to 70% by dry weight of binding agent B, - from 26.9% to 82.9% by weight of water; and possibly comprising at least one agent selected from a particle spacer, a steric stabilizer, an electrostatic stabilizer, an opacifier, a colorant, a dispersing agent other than polymer P, a solvent, a coalescing agent, an antifoaming agent, a preservative, a biocide, a spreading agent, a thickening agent, a film-forming copolymer and mixtures thereof.

8. Method of preparing an aqueous composition R according to any one of claims 1 to 7, comprising mixing in water and under stirring: - at least one water-soluble polymer P, - at least one organic, organometallic or mineral pigment Q and - at least one binding agent B.

9. Method for controlling the viscosity of a composition R according to any one of claims 1 to 7 comprising the addition of at least one polymer P to an aqueous composition comprising at least one organic, organometallic or mineral pigment Q and at least one binding agent B.

10. Aqueous agent G comprising at least one polymer P for controlling the viscosity of an aqueous composition R according to any one of claims 1 to 7.

11. Aqueous agent G according to claim 10 also comprising at least one solvent, in particular a coalescing solvent, for example glycol, butyl glycol, butyldiglycol, monopropylene glycol, ethylene glycol, ethylenediglycol, "Dowanol" products of which CAS number 34590-94-8, "Texanol" products of which CAS number 25265-77-4; or combined with at least one additive selected from an amphiphilic compound, in particular a surfactant compound, preferably a hydroxylated surfactant compound, for example alkyl-polyalkylene glycol, in particular alkyl-polyethylene glycol and alkyl-polypropylene glycol; a polysaccharide derivative, for example cyclodextrin, cyclodextrin derivative, polyethers, alkyl-glucosides; a hydrotropic compound, an antifoaming agent, a biocidal agent and their combinations.