Abstract: Copolymer dispersants for use in an aqueous emulsion containing fillers pigments or both where the copolymer has the formula (I)--(A).sub.a --(B).sub.b --(C).sub.c -- (I)whereinA represents units resulting from acrylic or methacrylic acid monomers,B represents units resulting from styrene monomers or a derivative thereof,C represents units resulting from C.sub.1 -C.sub.4 alkyl acrylate or methacrylate monomers,a, b and c represent the percentages by weight of A, B and C, respectively with respect to total weight of the monomers,wherein the copolymer yields a homogeneous solution which is clear to cloudy in a medium of neutral or alkaline pH and wherein the copolymer has a specific viscosity of less than or equal to 15, which imparts increased water resistance to dry or drying films made from aqeuous emulsion compositions containing the copolymer dispersant. The resulting aqueous compositions are useful as textured coatings, coatings, aqueous paints and coating compositions.

Abstract: Homopolymers and/or copolymers are manufactured by polymerizing ethylenically monounsaturated monomer(s) in an aqueous solution in a reaction vessel containing compounds which contain a phosphorus atom of degree of oxidation less than 5, phosphorous compounds being introduced in amounts of 0.005-0.49 gram-atom phosphorus per mol of unsaturation in said ethylenically unsaturated monomer(s) in the presence of hydrogen peroxide and in the absence of any agent(s) which decomposes hydrogen peroxide thereby forming free radicals, in the absence of any other generator of free radicals, and in the absence of any per salt and/or any other transfer agent.

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 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 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 obtained by polymerization and/or copolymerization of acrylic and/or vinyl monomers containing acid groups, and in which the active acid sites are completely or partially neutralized to a degree of 40% to 60%, including terminals, using a neutralizing agent containing magnesium ions, and to a degree of up to 60% using a neutralizing agent containing monovalent ions is disclosed.A procedure for grinding in an aqueous suspension using said agent, as well as the aqueous suspensions produced using said procedure and their applications to the fields of weight fillers, paper coating, paints, and plastics is also 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 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 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 obtained by polymerization and/or copolymerization of acrylic and/or vinyl monomers containing acid groups, and in which the active acid sites are completely or partially neutralized to a degree of 40% to 60%, including terminals, using a neutralizing agent containing magnesium ions, and to a degree of up to 60% using a neutralizing agent containing monovalent ions is disclosed.A procedure for grinding in an aqueous suspension using said agent, as well as the aqueous suspensions produced using said procedure and their applications to the fields of weight fillers, paper coating, paints, and plastics is also 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: 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: Non-polluting thinning adjuvant for sea-water and/or fresh-water based drilling muds.Non-polluting thinning adjuvant for sea-water and/or fresh-water based drilling muds, with the aim to maintain their rheological characteristics in the extreme conditions of temperature and pressure which prevail in wells drilled at great depths. This thinning adjuvant is characterized by the fact that it is a hydrosoluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid.Its general formula is: ##STR1## in which the indices m,n,p -expressed in % in mole- are chosen from the following intervals:0%<m<90%2%<n<100%0%<p<90%and where radicals R.sub.1, R.sub.2 and R.sub.4 are chosen from the group consisting of H and the alkyles, and radical R.sub.3 is chosen from the group consisting of alkylenes and alkylene-oxides and/or polyalkylene oxides.

Abstract: A microencapsulation of varied substances such as aromatic agents, colorings, inks, chemical reactives, pharmaceutical and phytosanitary products, fireproof products, glues, finely dispersed in an aqueous phase, in order to obtain microcapsules that are simulaneously isodiametrical and with regularized diameters, which consists in placing face to place an aqueous solution of polymers and/or hydrosoluble copolymers including at least one of the chemical functions belonging to the group constituted by the radicles --COOH, --OH, --CONH.sub.2, --COHNR, --CONRR', --NH.sub.2, NHR and --NRR', constituting the material of the capsule containing shell, and a solution of substances to be coated in at least one hydrophobic organic solvent, density close to 1, then submitting the liquid medium thus constituted to a mechanical shearing action corresponding to a shearing coefficient included between 8,000 second.sup.-1 and 70,000 second.sup.-1, while the medium is maintained at a temperature between 15.degree. C. and 85.

Abstract: New medical self-polymerizable sealing cement with an acrylic polymer and/or copolymer base, applicable for prosthetic implants, which is obtained by mixing a liquid phase and a solid phase. The liquid phase, being viscous, forms a collodion of an acrylic polymer and/or copolymer in at least one monomer, while the solid phase is composed of an acrylic polymer and/or copolymer possibly containing a mineral load.The new cement is not dangerous for the patient, due to an absence of monomer exudation and due to a polymerization temperature which is always lower than the mobilization temperature of human fat.