Abstract: A grinding agent containing polymers and/or copolymers partially neutralized by magnesium, for aqueous suspensions of mineral substances to be used in pigmentary applications is disclosed.A grinding agent composed of polymers and/or copolymers having a specific viscosity of between 0.3 and 0.8 and obtained by treatment, using one or several solvents, of a polymer and/or copolymer resulting from polymerization and/or copolymerization of acrylic and/or vinyl monomers comprising acid groups whose active acid sites are partially or completely neutralized to a degree of neutralization of 40 to 60%, including terminals, of the active acid sites using a neutralizing agent containing magnesium ions, and a degree of neutralization reaching 60% using a neutralizing agent containing sodium ions is disclosed.

Abstract: A stable aqueous zeolite suspension containing, as stabilizing agent, a copolymer comprising units of (i) at least one acrylic monomer having a carboxylic acid group, (ii) at least one acrylic and/or vinyl monomer not having a carboxylic acid group, and (iii) at least one oxyalkylated monomer having ethylenic unsaturation, and terminated by a fatty hydrophobic chain having 12-40 C atoms.

Abstract: A dispersing agent for use in a thermosetting composition, a thermosetting composition containing said dispersing agent, and application thereof to thermosetting composition having no yield point. The dispersing agent acting on mineral fillers and used in filled acrylic or polyester resin-based thermosetting compositions belongs to the family of organophosphates corresponding to the general formula: ##STR1## where: A is a branched or unbranched polyaryl group,x and y are whole numbers between 0 and 100 such that x+y is a whole number greater than 40 but not greater than 100, ##STR2## B and E are independently a branched or unbranched polyaryl group, or an alkyl, aryl, arylalkyl, alkylaryl, alkanoyl, or amine radical, and in B and E, and R.sub.1 and R.sub.2 may be identical or different, x1, y1, x2 and y2 are whole numbers, and the sums x1+y1 and x2+y2 are not greater than 100.

Abstract: A copolymer comprised of at least one monomer having ethylenic unsaturation and a carboxylic acid group, optionally at least one monomer having ethylenic unsaturation and not having a carboxylic acid group, at least one oxyalkylated monomer having ethylenic unsaturation and terminated by a fatty hydrophobic chain having at least 26 C atoms, and optionally at least one monomer having at least two sites of ethylenic unsaturation. The copolymer is employed as a modifier of rheological properties, stabilizing agent, and/or an antisedimentation or suspension agent for coarse mineral of organic materials, in applications such as drilling muds, textile printing pies, cosmetics, detergents, plant protection, and paints and coatings.

Abstract: A copolymer comprised of at least one monomer having ethylenic unsaturation and a carboxylic acid group, optionally at least one monomer having ethylenic unsaturation and not having a carboxylic acid group, at least one oxyalkylated monomer having ethylenic unsaturation and terminated by a fatty hydrophobic chain having at least 26 C atoms, and optionally at least one monomer having at least two sites of ethylenic unsaturation. The copolymer is employed as a modifier of rheological properties, stabilizing agent, and/or an antisedimentation or suspension agent for coarse mineral or organic materials, in applications such as drilling muds, textile printing pies, cosmetics, detergents, plant protection, and paints and coatings.

Abstract: Water-soluble polymers and/or copolymers possessing enhanced biodegradability, and their applications are disclosed.Acrylic and/or vinyl polymers and/or copolymers containing acid groups, in which 35% to 90% of the active acid sites are neutralized by magnesium ions, the specific viscosity is at most 25, and biodegradability is enhanced. Their decomposition after 36 days is greater than 50% as measured by the modified Sturm test.These polymers can be used in industries as varied as: paper-making, paints, plastics, petroleum, drilling fluids, water treatment, detergents, cosmetics, textiles, inks, leather, grinding and/or splitting of minerals in water.

Abstract: A grinding agent for refining coarse lime by grinding in an aqueous medium to a microparticulate size, composed of a water-soluble ethylene polymer and/or copolymer, wherein, said grinding agent:a) is formed from a least one monocarboxylic ethylenically unsaturated monomer, andb) has an average molecular weight of between 200 and 1,900 g/mole.Grinding in the presence of the grinding agent allows the production of aqueous lime suspensions which have a high concentration of dry material expressed in weight percent, preferably between 40% and 60%, with particles of a size of less than 4 microns and median diameter of less than 2.9 microns.

Abstract: Copolymers for stabilizing aqueous suspensions of sodium silico-aluminates or zeolites, which are crosslinked, soluble in water, at least at pH 7 or above, and consist essentially of:a) at least one non-crosslinking acrylic monomer having a carboxylic function, chosen from among acrylic and methacrylic acids,b) possibly at least one non-crosslinking acrylic monomer chosen from among the esters, amides and/or nitriles of acrylic and/or methacrylic acids,(c) at least one crosslinking monomer having at least two acrylic and/or allyl and/or vinyl double bonds,(d) possibly, at least one at least bifunctional crosslinking monomer comprising at most one double bond and at least one other chemical function that is reactive with regard to the other monomers with acid, amide or nitrile functions of the monomers of types (a) and (b),the total amount of the crosslinking monomers of types (c) and (d) constituting from 1 to 5, preferably from 1 to 4 weight percent based on the total weight of the monomers, when used in a r

Abstract: Ground calcium carbonate is prepared by a process of grinding a suspension containing calcium carbonate and a water-soluble grinding agent in an aqueous medium while the temperature of the aqueous suspension is kept at or below 60.degree. C.

Abstract: A water-soluble complexing agent of metallic cations having a high complexing power and a high threshhold effect, constituted from acrylic copolymers, characterized by the fact that said agent is formed by terpolymers comprising acrylic and methacrylic and itaconic units of the general formula: ##STR1## in which the indices, expressed in percent by weight have at least a value of 10 for x and y, and a value of 5 for z.

Abstract: Copolymers having the general formula: ##STR1## are useful as compatibility, dispersion and grinding agents for aqueous pigmentary suspensions formulated from a mixture of mineral pigments, at least one of which is hydrated calcium sulfate. These suspensions are useful in papermaking.

Abstract: The viscosity increase of aqueous calcium carbonate pigment suspensions having high concentrations of dry substance is prevented by adding as a compatibility, dispersing, and/or grinding agent to an aqueous calcium carbonate suspension a copolymer of the formula: ##STR1## wherein R.sub.1 is H or methyl, R.sub.2 and R.sub.3 is H, C.sub.1-4 alkyl or a carboxylic acid group, R.sub.4 is H or C.sub.1-4 alkyl, R.sub.5 is a bridging group, R.sub.6 is H, a cation, an amino group, C.sub.1-3 alkyl, C.sub.1-4 ester or substituted amide and R.sub.7 to R.sub.9 each is hydrogen, a carboxylic acid containing group; K has a value between 30 and 65% by weight relative to the total weight; L has a value between 20 and 60% by weight relative to the total weight; M has a value between 10 and 45% by weight relative to the total weight; and the sum of L and M is equal to at least 35% by weight relative to the total weight, thereby preventing the shock effect when a concentrated alkaline electrolyte is added to the suspension.

Abstract: Copolymers having the general formula: ##STR1## are useful as compatibility, dispersion and grinding agents for aqueous pigmentary suspensions formulated from a mixture of mineral pigments, at least one of which is hydrated calcium sulfate. These suspensions are useful in papermaking.

Abstract: Copolymers having the general formula: ##STR1## are useful as compatibility, dispersion and grinding agents for aqueous pigmentary suspensions formulated from a mixture of mineral pigments, at least one of which is hydrated calcium sulfate. These suspensions are useful in papermaking.

Abstract: A non-polluting dispersing agent for drilling fluids based on soft water or salt water.A dispersing agent for aqueous drilling fluids, optionally saline, belonging to the group of polymers and/or copolymers containing acid functions which is characterized in that, to ensure that these fluids retain their rheological characteristics, even under the extreme temperature and pressure conditions prevailing in deep bore holes, said dispersing agent is a salt of said polymers and/or copolymers of which the salifying cation corresponds to a metal having a Pauling electronegativity at least equal to 0.95 and preferably greater than 1.

Abstract: An associative thickening copolymer, water-soluble in a neutral or alkaline medium, for charged and/or pigmented, white or colored aqueous compositions is disclosed. The copolymer is composed of (a) at least one monomer with ethylenic unsaturation having at least one carboxylic function, (b) at least one other monomer with ethylenic unsaturation without a carboxylic function, (c) at least one surfactant monomer having at least one urethane function resulting from the reaction of an isocyanate with ethylenic unsaturation with a surfactant compound having a hydroxyl function which is reactive with regard to the --NCO group, wherein said copolymer belongs to the group composed of those which, by definition, placed in aqueous solution with 2% by weight of dry material, brought to a pH of 9 by the addition of ammonia and at a temperature of 20.degree. C., have a Brookfield viscosity at 100 revolutions per minute of at most equal to 220 centipoises.

Abstract: An associative thickening copolymer, water-soluble in a neutral or alkaline medium, for charged and/or pigmented, white or colored aqueous compositions is disclosed. The copolymer is composed of (a) at least one monomer with ethylenic unsaturation having at least one carboxylic function, (b) at least one other monomer with ethylenic unsaturation without a carboxylic function, (c) at least one surfactant monomer having at least one urethane function resulting from the reaction of an isocyanate with ethylenic unsaturation with a surfactant compound having a hydroxyl function which is reactive with regard to the --NCO group, wherein said copolymer belongs to the group composed of those which, by definition, placed in aqueous solution with 2% by weight of dry material, brought to a pH of 9 by the addition of ammonia and at a temperature of 20.degree. C., have a Brookfield viscosity at 100 revolutions per minute of at most equal to 220 centipoises.

Abstract: A granular polymer composition having increased water absorption and desorption capability, resistance to photogradation and increased life span, comprising a water-insoluble but swellable cross-linked polymer material formed of at least one polymer and/or copolymer prepared from at least one unsaturated ethylene monomer having at least one carboxylic, amide, sulfuric, sulfonic, phosphoric, phosphonic, or hydroxyl functional group and at least one powdered mineral charge well dispersed in and intimately bonded to said polymer as a result of its introduction into the mixture of monomers of the same type or of a different type before their polymerization into said polymer or copolymer.

Abstract: Grinding agent based upon neutralized polymers and/or copolymers for an aqueous suspension of coarse mineral materials for applications in pigments consisting of acid acrylic polymers and/or copolymers which are entirely neutralized by at least one neutralizing agent having a monovalent function and at least one neutralizing agent having a polyvalent function.

Abstract: An agent to be used to treat water and aqueous media contacting heat transfer surfaces for inhibiting the build-up of scale and settlement of dissolved alkaline earth materials in water and aqueous media, which agent consists of acrylic and methacrylic acid polymers and/or copolymers and is characterized in that it comprises the fraction of said polymers and/or copolymers having a symmetrical, single-mode molecular weight distribution centered on an average molecular weight of about 800, in which 100% of said molecular weights are individually lower than 1,200 and at least 90% of same are in the 400-1,000 range.