CONTINUOUS ESTERIFICATION AND/OR AMIDIFICATION METHOD, WITHOUT ORGANIC SOLVENT, OF AN ACID HOMOPOLYMER OR COPOLYMER

The present invention relates to a continuous process for preparing a comb polymer, without organic solvent, by esterification and/or amidification of an acidic homopolymer or copolymer, which consists in performing the esterification and/or amidification of said homopolymer/copolymer by reaction at elevated temperature in the mixing and transportation zone of a tubular reactor, optionally equipped with a water removal system, in the presence of at least one poly(alkylene glycol) in solid or molten form and of an antioxidant, said esterification and/or amidification taking place at a temperature greater than or equal to 170° C. 1. A continuous process for preparing a comb polymer , without organic solvent , by esterification and/or amidification of an acidic homopolymer or copolymer , the process comprising:performing the esterification and/or amidification of said homopolymer/copolymer by reaction at elevated temperature in a mixing and transportation zone of a tubular reactor, optionally equipped with a water removal system, in the presence of at least one poly(alkylene glycol) in solid form or in molten form and of an antioxidant, said esterification and/or amidification taking place at a temperature of greater than or equal to 170° C., optionally in the presence of an esterification and/or amidification catalyst, optionally at reduced pressure and/or under a stream of inert gas.2. The continuous process according to claim 1 , wherein said acidic homopolymer or copolymer results from the polymerization or copolymerization of at least one of the monomers chosen from the group consisting of acrylic acid claim 1 , methacrylic acid claim 1 , itaconic acid claim 1 , crotonic acid claim 1 , fumaric acid and maleic anhydride.3. The continuous process according to claim 1 , according to which said poly(alkylene glycol) has a formula (I):{'br': None, 'sub': 'A', 'R-A-OH \u2003\u2003(I)'}wherein: [{'sub': 2', '4', '4, 'm alkylene oxide units of formula —O—CH—CHR— with ...

FLUIDITY-RETAINING AGENT FOR HYDRAULIC COMPOSITIONS, COMPATIBLE WITH A WATER-REDUCING AGENT OF THE COMB POLYMER TYPE

The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More precisely, the present patent application relates to a slump retaining agent which is compatible with a water-reducing agent of hydrophilic comb polymer type. 1. A slump retaining agent for a hydraulic composition , which consists of a copolymer obtained by polymerization of:a) at least one anionic monomer comprising a polymerizable unsaturated function and a carboxylic group, [{'br': None, 'sub': f', 'm', 'n', 'p', 'f, 'R-[(EO)-(PO)-(BO)]-R′ \u2003\u2003(I)'}, 'in which:', {'sub': m', 'n', 'p, '[(EO)-(PO)-(BO)] represents at least one polyalkoxylated chain consisting of alkoxylated units, arranged in blocks, randomly or alternatively, selected from the group consisting of ethoxylated units EO, propoxylated units PO and butoxylated units BO,'}, 'm, n and p represent, independently of each other, 0 or an integer ranging from 1 to 250 (inclusive), the sum of m, n and p being between 10 and 250,', {'sub': 'f', 'Rrepresents a radical containing a polymerizable unsaturated function and'}, {'sub': 'f', 'R′ represents hydrogen or an alkyl group containing from 1 to 4 carbon atoms and'}], 'b) at least one macromonomer having a formula (I) wherein said copolymer has a molecular weight of greater than 400,000 g/mol as determined by SEC; and', 'wherein said slump retaining agent is not a water reducing agent according to standard ADVJUVANT NF EN 934.2., 'c) at least one nonionic cross-linking monomer comprising at least two polymerizable unsaturated functions and an ester group,'}2. The slump retaining agent according to claim 1 , according to which the monomers a) are at least one selected from the group consisting of acrylic acid claim 1 , methacrylic acid claim 1 , maleic acid claim 1 , itaconic acid claim 1 , crotonic acid and a mixture of these monomers.3. The slump retaining agent according to claim 1 , according to which the polymerizable ...

NOVEL COPOLYMER AS A WATER-REDUCING AGENT IN A HYDRAULIC COMPOSITION AND USE OF COPOLYMERS FOR IMPROVING THE EARLY MECHANICAL STRENGTH OF A HYDRAULIC COMPOSITION

Novel copolymers obtained by polymerisation a mixture of monomers comprising: at least one anionic monomer (a) comprising a polymerisable unsaturated function and a carboxylic group; and at least one monomer (b) of formula (I): 1. A copolymer obtained by polymerization a monomer mixture comprising:at least one anionic monomer (a) comprising a polymerizable unsaturated function and a carboxylic group; and {'br': None, 'i': H', 'C═C', 'R', 'CH', '—O—', 'EO', 'PO', 'H, 'sub': 2', '1', '2', 'p', 'n', 'm]-, '(—)-()-[()-()\u2003\u2003(I)'}, 'at least one monomer (b) of formula (I)wherein:{'sub': 1', '3, 'Rrepresents a hydrogen atom or a CHgroup;'}p is 1 or 2;{'sub': n', 'm, '[(EO)-(PO)] represents a polyalkoxyl chain made of ethoxyl units EO and propoxyl units PO, distributed in blocks, alternately or randomly;'}m and n represent integers ranging between 1 and 250, the sum of m and n being greater than or equal to 10, with the proviso that the mole proportion of the ethoxyl units in the polyalkoxyl chain (n)/(m+n) is greater than or equal to 70% and strictly less than 90%.2. The copolymer of claim 1 , wherein the monomer (b) has formula (I′):{'br': None, 'i': H', 'C═C', 'R', 'CH', '—O', 'EO', 'PO', 'H, 'sub': 2', '1', '2', 'n', 'm, '(—)-—[()-()]-\u2003\u2003(I′).'}3. The copolymer of claim 1 , wherein monomer (b) has formula (II):{'br': None, 'i': H', 'C═C', 'CH', 'CH', '—O—', 'EO', 'PO', 'H, 'sub': 2', '3', '2', 'n', 'm, '(—)-[()-()]-\u2003\u2003(II).'}4. The copolymer of claim 1 , wherein the mole proportion of the ethoxyl units in the polyalkoxyl chain of monomer (b) is between 70% and 88%.5. The copolymer of claim 1 , wherein the total number of ethoxyl and propoxyl units (m+n) of the polyalkoxyl chain of the monomer (b) is between 10 and 150.6. The copolymer of claim 1 , where the monomer (b) represents from 1 to 50 mol % of the total mole number of monomers that constitute said copolymer.7. The copolymer of claim 1 , wherein the anionic monomer is at least one ...

USE AS AN AGENT IMPROVING THE WORKABILITY OF AN AQUEOUS FORMULATION WITH A HYDRAULIC BINDER BASE, OF A (METH)ACRYLIC COMB-BRANCHED COPOLYMER AND AN ASSOCIATIVE ACRYLIC THICKENER

The present invention pertains to the use, in the manufacture of an aqueous formulation with a hydraulic binder base, of a combination of at least one comb-branched copolymer having a (meth)acrylic skeleton, onto which are grafted side-chains terminated by a hydrophilic group, and at least one ASE acrylic polymer. This results in improving the workability of said formulation, without causing a segregation phenomenon. 122-. (canceled)23. A combination useful for improving the workability of an aqueous formulation with a hydraulic binder base , the combination comprising:an aqueous solution comprising water and a comb-branched (meth)acrylic copolymer having at least one side-chain bearing at least one alcoxy- or hydroxy-polyalkylene glycol hydrophilic group; andan aqueous solution comprising water and an ASE acrylic polymer consisting of 55 wt. % methacrylic acid and 45% wt. % ethyl acrylate.25. A method of for improving the workability of an aqueous formulation with a hydraulic binder base claim 23 , comprising mixing the combination according to with a hydraulic binder base.26. The method of claim 25 , wherein the formulation is a mortar.27. The method of claim 25 , wherein the formulation is a concrete.28. The method of claim 25 , wherein the formulation is a grout.29. The method of claim 25 , wherein the formulation claim 25 , after the addition of the combination claim 25 , remains workable for at least three hours.30. An aqueous formulation comprising a hydraulic binder base and the combination of .31. The aqueous formulation of claim 30 , wherein the formulation is a mortar.32. The aqueous formulation of claim 30 , wherein the formulation is a concrete.33. The aqueous formulation of claim 30 , wherein the formulation is a grout.34. The aqueous formulation of claim 30 , comprising 0.1 to 2% solids content of said comb-branched (meth)acrylic copolymer and ASE acrylic polymer in relation to the solid content of hydraulic binder.35. The aqueous formulation of claim ...

METHOD FOR PRODUCING A MASTER MIXTURE BASED ON CARBONACEOUS NANOFILLERS AND SUPER PLASTICISER, AND THE USE THEREOF IN HARDENABLE INORGANIC SYSTEMS

Hardenable inorganic systems such as cements, plasters, ceramics or liquid silicates, usable for example in the building trade, construction industry or oil drilling industry. The insertion of carbonaceous nanofillers, such as carbon nanotubes, for reinforcing mechanical properties and improving such systems. A method for producing a master mixture including at least one superplasticiser and carbonaceous nanofillers at a mass ratio of between 0.1% and 25%, preferably between 0.2% and 20%, in relation to the total weight of the master mixture, and also to said master mixture thus obtained and to the use thereof in a hardenable inorganic system with a view to producing materials with improved properties. The disclosure applies to the construction industry, the building trade and the oil drilling industry. 110-. (canceled)11. A process for the introduction of carbon-based nanofillers into a curable inorganic system , comprising at least the stage of introduction of water and of a master batch , separately or as a mixture , into a kneading appliance comprising at least one curable inorganic system , in order to ensure a content of carbon-based nanofillers ranging from 0.0001% to 0.02% by weight , with respect to the curable inorganic system , and a water/curable inorganic system ratio by weight ranging from 0.2 to 1.5 ,wherein the master batch comprises at least one superplasticizer and carbon-based nanofillers at a content by weight of between 0.1% and 25%, with respect to the total weight of the master batch, capable of being obtained according to a process for the preparation of a master batch, comprising:(i) the introduction into a kneader and then the kneading of carbon-based nanofillers and of at least one superplasticizer, optionally in the presence of a water-soluble dispersing agent, in order to form a homogeneous mixture in the solid form or in the pasty composition form:(ii) the extrusion of said mixture in the solid form in order to obtain a master batch in ...

POLY(ETHYLENE GLYCOL) GEMINAL ESTER PHOSPHATE, USE AS ADDITIVE IN HYDRAULIC COMPOSITIONS AND COMPOSITIONS CONTAINING SAME

The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More specifically, the present patent application relates to additives used in hydraulic compositions, to the compositions containing same, and also to the method for preparing these additives and to the various uses thereof. 2. The additive of claim 1 , wherein n+m≦10 and n+m≦10.3. The additive of claim 1 , wherein claim 1 , in formulas (I) claim 1 , (II) and (III) claim 1 , nand nare equal to 1 and mand mare equal to 0.4. The additive of claim 1 , wherein claim 1 , in formulas (I) claim 1 , (II) and (III) claim 1 , R represents CH.5. The additive of claim 1 , wherein M is selected from the group consisting of potassium ion claim 1 , sodium ion claim 1 , lithium ion claim 1 , calcium ion claim 1 , magnesium ion claim 1 , ammonium ion and a mixture thereof.6. The additive of claim 1 , wherein claim 1 , in formula (I) claim 1 , m is equal to 0.7. The additive of claim 1 , wherein claim 1 , formula (I) claim 1 , n varies between 20 and 120 (inclusive).8. A hydraulic composition claim 1 , comprising:water,a hydraulic binder comprising a cement, and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'at least one additive of .'}9. The hydraulic composition according to claim 8 , comprising claim 8 , relative to a total weight of the composition:from 2 to 15% by weight of the water,from 10 to 30% by weight of the hydraulic binder, andfrom 0.05 to 3% by weight of the at least one additive.10. The hydraulic composition according to claim 9 , further comprising from 10 to 60% by weight of sand.11. The hydraulic composition of claim 8 , comprising:from 2 to 15% by weight of the water,from 10 to 30% by weight of the hydraulic binder,from 0.05 to 3% by weight of the at least one additive,from 10 to 60% by weight of sand, andfrom 10 to 60% by weight of one or more gravels.13. A hydraulic composition claim 1 , comprising the additive of in the form of a ...

METHOD FOR PRODUCING A MASTER MIXTURE BASED ON CARBONACEOUS NANOFILLERS AND SUPERPLASTICISER, AND THE USE THEREOF IN HARDENABLE INORGANIC SYSTEMS

Hardenable inorganic systems such as cements, plasters, ceramics or liquid silicates, usable for example in the building trade, construction industry or oil drilling industry. The insertion of carbonaceous nanofillers, such as carbon nanotubes, for reinforcing mechanical properties and improving such systems. A method for producing a master mixture including at least one superplasticiser and carbonaceous nanofillers at a mass ratio of between 0.1% and 25%, preferably between 0.2% and 20%, in relation to the total weight of the master mixture, and also to said master mixture thus obtained and to the use thereof in a hardenable inorganic system with a view to producing materials with improved properties. The disclosure applies to the construction industry, the building trade and the oil drilling industry. 1. A process for the preparation of a master batch comprising at least one superplasticizer and from 0.1% to 25% by weight of carbon-based nanofillers , expressed with respect to the total weight of the master batch , comprising:(i) the introduction into a kneader and then the kneading of carbon-based nanofillers and of at least one superplasticizer, optionally in the presence of a water-soluble dispersing agent, in order to form a homogeneous mixture in the solid form or in the pasty composition form;(ii) the extrusion of said mixture in the solid form in order to obtain a master batch in the solid form;(iii) optionally the dispersion of said master batch in the solid form in a superplasticizer identical to or different from that of stage (i), or in a water-soluble dispersant, in order to obtain a master batch in the form of a pasty composition;(iv) optionally the introduction of the master batch in the form of a pasty composition obtained in stage (i) or in stage (iii), into a superplasticizer which is identical to or different from that of stage (i) or that of stage (iii), in order to obtain a master batch having a low content of carbon-based nanofillers.2. The ...

USE OF A COMBINATION OF COMBINED POLYMERS AS AN AGENT ENHANCING THE HANDLING OF AQUEOUS FORMULATION BASED ON HYDRAULIC BINDERS.

La présente invention concerne l'utilisation, dans la fabrication d'une formulation aqueuse à base de liants hydrauliques, de combinaison entre au moins un copolymère peignes disposant d'un squelette (méth)acrylique, sur lequel sont greffées des chaînes latérales terminées par un groupement hydrophile, et au moins un copolymère peignes disposant d'un squelette (méth)acrylique, sur lequel sont greffées des chaînes latérales terminées par un groupement hydrophobe. On parvient à améliorer la maniabilité de ladite formulation, sans provoquer de phénomène de ségrégation. The present invention relates to the use, in the manufacture of an aqueous formulation based on hydraulic binders, of a combination between at least one comb copolymer having a (meth) acrylic backbone, on which are grafted side chains terminated by a hydrophilic group, and at least one comb copolymer having a (meth) acrylic backbone, on which are grafted side chains terminated by a hydrophobic group. It is possible to improve the workability of said formulation, without causing segregation phenomenon.

USE AS AN AGENT ENHANCING THE MANEUVERABILITY OF AN AQUEOUS FORMULATION BASED ON HYDRAULIC BINDERS, A COMBINED (METH) ACRYLIC COPOLYMER AND AN ASSOCIATIVE ACRYLIC THICKENER

La présente invention concerne l'utilisation, dans la fabrication d'une formulation aqueuse à base de liants hydrauliques, de combinaison entre au moins un copolymère peignes disposant d'un squelette (méth)acrylique, sur lequel sont greffées des chaînes latérales terminées par un groupement hydrophile, et au moins un polymère acrylique de type ASE. On parvient à améliorer la maniabilité de ladite formulation, sans provoquer de phénomène de ségrégation. The present invention relates to the use, in the manufacture of an aqueous formulation based on hydraulic binders, of a combination between at least one comb copolymer having a (meth) acrylic backbone, on which are grafted side chains terminated by a hydrophilic group, and at least one acrylic polymer type ASE. It is possible to improve the workability of said formulation, without causing segregation phenomenon.

Improved method for producing comb polymers by adding an antioxidant, resulting polymers and uses thereof

PROCESS FOR ENCAPSULATING OILS IN AQUEOUS MEDIUM WITH HASE TYPE POLYMER EMULSIONS, PRODUCTS OBTAINED AND USES THEREOF

L'invention consiste en un procédé de fabrication d'une formulation aqueuse contenant au moins une huile, et comprenant les étapes de mélanger au moins un polymère associatif, une huile et de l'eau, encapsulation de l'huile par augmentation du pH à une valeur supérieure à 8, éventuellement précipitation du mélange par diminution du pH à une valeur inférieure à 6, et éventuellement isolation des particules obtenues par élimination de l'eau. Les formulations aqueuses, de même que les dispersions aqueuses, et les particules solides résultantes constituent d'autres objets de l'invention. The invention consists of a process for manufacturing an aqueous formulation containing at least one oil, and comprising the steps of mixing at least one associative polymer, an oil and water, encapsulation of the oil by increasing the pH to a value greater than 8, optionally precipitation of the mixture by decreasing the pH to a value less than 6, and optionally isolation of the particles obtained by elimination of the water. Aqueous formulations, as well as aqueous dispersions, and the resulting solid particles constitute other subjects of the invention.

IMPROVING A PROCESS FOR THE PRODUCTION OF COMBINED POLYMERS BY ADDING AN ANTIOXIDANT, POLYMERS OBTAINED AND THEIR APPLICATIONS

USE AS AN AGENT ENHANCING THE MANEUVERABILITY OF AN AQUEOUS FORMULATION BASED ON HYDRAULIC BINDERS, A COMBINED (METH) ACRYLIC COPOLYMER AND AN ASSOCIATIVE ACRYLIC THICKENER

USE OF COPOLYMERS FOR IMPROVING MECHANICAL RESISTANCE TO YOUNG PEOPLE OF A HYDRAULIC COMPOSITION

CONTINUOUS METHOD FOR ESTERIFYING OR AMIDIFYING, WITHOUT ORGANIC SOLVENT, AN ACIDIC HOMOPOLYMER OR COPOLYMER

La présente invention concerne un procédé continu de préparation d'un polymère peigne, sans solvant organique, par estérification et/ou amidification d'un homopolymère ou copolymère acide, consistant à procéder à l'estérification et/ou l'amidification dudit homopolymère/copolymère par pétrissage à chaud dans la zone de mélange et de transport d'une extrudeuse, éventuellement équipée d'un système d'élimination de l'eau, en présence d'au moins un poly(alkylène glycol) sous forme solide ou à l'état fondu et d'un antioxydant, ladite estérification et/ou amidification ayant lieu à une température supérieure ou égale à 170°C. The present invention relates to a continuous process for the preparation of a comb polymer, without organic solvent, by esterification and / or amidification of an acidic homopolymer or copolymer, consisting in carrying out the esterification and / or amidification of said homopolymer / copolymer by hot kneading in the mixing and transport zone of an extruder, optionally equipped with a water removal system, in the presence of at least one poly (alkylene glycol) in solid form or at least one melt and an antioxidant, said esterification and / or amidification occurring at a temperature greater than or equal to 170 ° C.

POLY (ETHYLENE GLYCOL) GEMINE ESTER PHOSPHATE, USE AS ADDITIVE IN HYDRAULIC COMPOSITIONS AND COMPOSITIONS CONTAINING SAME

Poly(ethylene glycol) geminal ester phosphate, use as additive in hydraulic compositions and compositions containing same

The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More specifically, the present patent application relates to additives used in hydraulic compositions, to the compositions containing same, and also to the method for preparing these additives and to the various uses thereof.

PROCESS FOR ENCAPSULATING OILS IN AQUEOUS MEDIUM WITH HASE TYPE POLYMER EMULSIONS, PRODUCTS OBTAINED AND USES THEREOF

L'invention consiste en un procédé de fabrication d'une formulation aqueuse contenant au moins une huile, et comprenant les étapes de mélanger au moins un polymère associatif, une huile et de l'eau, encapsulation de l'huile par augmentation du pH à une valeur supérieure à 8, éventuellement précipitation du mélange par diminution du pH à une valeur inférieure à 6, et éventuellement isolation des particules obtenues par élimination de l'eau. Les formulations aqueuses, de même que les dispersions aqueuses, et les particules solides résultantes constituent d'autres objets de l'invention. The invention consists of a method for manufacturing an aqueous formulation containing at least one oil, and comprising the steps of mixing at least one associative polymer, an oil and water, encapsulation of the oil by increasing the pH to a value greater than 8, optionally precipitation of the mixture by decreasing the pH to a value of less than 6, and optionally isolation of the particles obtained by removal of the water. Aqueous formulations, as well as aqueous dispersions, and the resulting solid particles are other objects of the invention.

NOVEL COPOLYMER AS A WATER-REDUCING AGENT IN A HYDRAULIC COMPOSITION

MASTER MIXTURE BASED ON CARBON NANOCHARGES AND SUPERPLASTIFIANT, AND ITS USE IN INORGANIC CURABLE SYSTEMS

AQUEOUS SOLUTION OF COMBINED (METH) ACRYLIC COMBINED POLYMER WITH A DRY EXTRACT OF MORE THAN 60%, PROCESS FOR PRODUCTION AND USE AS FLUIDIZING AGENT.

La présente invention concerne une solution aqueuse de polymère peigne, disposant d'un squelette de nature (méth)acrylique fonctionnalisé par des chaînes latérales avec des fonctions hydrophiles du type alcoxy ou hydroxy polyalkylène glycol, ladite solution demeurant stable et manipulable à des extraits secs supérieurs à 60 % de son poids. L'invention concerne aussi un procédé de fabrication de telles solutions, de même que leur utilisation comme agent fluidifiant, et des compositions à base de liants hydrauliques les contenant. The present invention relates to an aqueous solution of comb polymer, having a backbone of (meth) acrylic nature functionalized by side chains with hydrophilic functions of the alkoxy or hydroxy polyalkylene glycol type, said solution remaining stable and handling higher dry extracts. at 60% of its weight. The invention also relates to a process for the manufacture of such solutions, as well as their use as a fluidifying agent, and compositions based on hydraulic binders containing them.

NOVEL COPOLYMER AS A WATER-REDUCING AGENT IN A HYDRAULIC COMPOSITION

L'invention concerne de nouveaux copolymères obtenus par polymérisation à partir d'un mélange de monomères comprenant : - au moins un monomère anionique (a) comprenant une fonction insaturée polymérisable et un groupement carboxylique ; et - au moins un monomère (b) de formule (I) : H2C = C (- R1) - (CH2)p - O - [ (EO)n - (PO)m ] - H (I) dans laquelle [ (EO)n - (PO)m ] représente une chaîne polyalkoxylée constituée d'unités éthoxylées EO et d'unités propoxylées PO, réparties en blocs, alternées ou statistiques, la proportion molaire des unités éthoxylées dans la chaîne polyalkoxylée (n)/(m+n) étant supérieure ou égale à 70 % et strictement inférieure à 90 %. Elle concerne également des compositions hydrauliques, par exemple des compositions de béton, comprenant de tels copolymères, ainsi que l'utilisation de ces copolymères à titre d'agents réducteurs d'eau dans des compositions hydrauliques. The invention relates to novel copolymers obtained by polymerization from a monomer mixture comprising: at least one anionic monomer (a) comprising a polymerizable unsaturated functional group and a carboxylic group; and at least one monomer (b) of formula (I): ## STR2 ## wherein [( EO) n - (PO) m] represents a polyalkoxylated chain consisting of ethoxylated units EO and propoxylated units PO, divided into blocks, alternating or statistical, the molar proportion of the ethoxylated units in the polyalkoxylated chain (n) / (m + n) being greater than or equal to 70% and strictly less than 90%. It also relates to hydraulic compositions, for example concrete compositions, comprising such copolymers, as well as the use of these copolymers as water-reducing agents in hydraulic compositions.

USE OF COPOLYMERS FOR IMPROVING MECHANICAL RESISTANCE TO YOUNG PEOPLE OF A HYDRAULIC COMPOSITION

L'invention concerne l'utilisation, pour augmenter la résistance mécanique aux jeunes âges d'une composition hydraulique, d'au moins un copolymère obtenu par polymérisation à partir d'un mélange de monomères comprenant : - au moins un monomère anionique (a) comprenant une fonction insaturée polymérisable et un groupement carboxylique et - au moins un monomère (b) de formule (I) suivante : H2C = C (- R1) - (CH2)p - O - [(EO)n - (PO)m] - H (I) dans laquelle : R1 représente un atome d'hydrogène ou un groupement CH3, p vaut 1 ou 2, [(EO)n - (PO)m] représente une chaîne polyalkoxylée constituée d'unités éthoxylées EO et d'unités propoxylées PO, réparties en blocs, alternées ou statistiques et m et n représentent des entiers variant entre 1 et 250, la somme de m et n étant supérieure ou égale à 10, sous réserve que la proportion molaire des unités éthoxylées dans la chaîne polyalkoxylée (n)/(m+n) soit strictement inférieure à 90%. The invention relates to the use, for increasing the mechanical strength at young ages of a hydraulic composition, of at least one copolymer obtained by polymerization from a monomer mixture comprising: at least one anionic monomer (a) comprising a polymerizable unsaturated functional group and a carboxylic group and - at least one monomer (b) of the following formula (I): H 2 C = C (- R 1) - (CH 2) p - O - [(EO) n - (PO) m ] - H (I) in which: R1 represents a hydrogen atom or a CH3 group, p is 1 or 2, [(EO) n - (PO) m] represents a polyalkoxylated chain consisting of ethoxylated units EO and d propoxylated units PO, divided into blocks, alternating or statistic and m and n represent integers varying between 1 and 250, the sum of m and n being greater than or equal to 10, provided that the molar proportion of the ethoxylated units in the chain polyalkoxylated (n) / (m + n) is strictly less than 90%.

Methods for encapsulation of oils in an aqueous medium with Hase polymer emulsions, products obtained and their uses.

Buluş, en az bir yağ içeren bir sulu formülasyonun üretilmesine yönelik olan ve en az bir birleşmeli polimerin, bir yağın ve suyun karıştırılması, pH?ın 8?den büyük olan bir değere artırılması yoluyla yağın kapsüllenmesi, isteğe bağlı olarak pH?ın 6?dan düşük bir değere düşürülmesi yoluyla karışımın çökeltilmesi ve isteğe bağlı olarak suyun uzaklaştırılması yoluyla elde edilen partiküllerin izole edilmesi adımlarını içeren bir yöntem ile ilgilidir. Sulu formülasyonların yanı sıra sulu dispersiyonlar ve elde edilen katı partiküller buluşun diğer amaçlarıdır. The invention is intended for the production of an aqueous formulation containing at least one oil and by mixing the at least one conjugated polymer, an oil and water, by increasing the pH to a value greater than 8, by encapsulation of the oil, optionally of pH from 6. It relates to a method comprising the steps of precipitating the mixture by lowering it to a low value and optionally isolating the particles obtained by removing the water. Besides aqueous formulations, aqueous dispersions and the solid particles obtained are further objects of the invention.

Continuous esterification and/or amidification method, without organic solvent, of an acid copolymer or homopolymer

The invention relates to a continuous method for producing a comb polymer, without organic solvent, by esterification and/or amidification of an acid copolymer or homopolymer, consisting in esterifying and/or amidifying said copolymer/homopolymer by hot reaction in the zone for mixture and transport of a tube reactor, optionally provided with a water elimination system, in the presence of at least one poly(alkylene glycol) in a solid form or in a melted form and an antioxidant, said esterification and/or amidification being carried out at a temperature higher than or equal to 170°C.

IMPROVING A PROCESS FOR THE PRODUCTION OF COMBINED POLYMERS BY ADDING AN ANTIOXIDANT, POLYMERS OBTAINED AND THEIR APPLICATIONS

L'invention réside dans la mise en oeuvre d'un antioxydant au cours de la réaction de fonctionnalisation d'un polymère (méth)acrylique à l'état sec par des groupements latéraux polyoxyalkylés, de manière à améliorer le taux de greffage du polymère final. Les polymères obtenus constituent un autre objet de l'invention, de même que les formulations aqueuses qui les contiennent. The invention lies in the use of an antioxidant during the reaction of functionalization of a (meth) acrylic polymer in the dry state by polyoxyalkylated side groups, so as to improve the grafting rate of the final polymer . The polymers obtained constitute another subject of the invention, as are the aqueous formulations which contain them.

Novel copolymer as a water-reducing agent in a hydraulic composition

The invention concerns novel copolymers obtained by polymerisation from a mixture of monomers comprising: - at least one anionic monomer (a) comprising a polymerisable unsaturated function and a carboxylic group; and - at least one monomer (b) of formula (I): H2C = C (- R1) - (CH2)p-O-[(EO)n-(PO)m]-H (I) in which [(EO)n-(PO)m] represents a polyalkoxylated chain consisting of ethoxylated units EO and propoxylated units PO, distributed into blocks, alternating or statistical, the molar proportion of the ethoxylated units in the polyalkoxylated chain (n)/(m+n) being greater than or equal to 70% and strictly less than 90%. It also concerns hydraulic compositions, for example concrete compositions, comprising such copolymers, and the use of said copolymers as water-reducing agents in hydraulic compositions.

FLUIDITE RETENTION AGENT FOR HYDRAULIC COMPOSITION COMPATIBLE WITH POLYMER-TYPE WATER-REDUCING AGENT

La présente invention concerne le domaine technique des compositions hydrauliques, par exemple les compositions de béton et de mortier. Plus précisément, la présente demande de brevet concerne un agent rétenteur de fluidité compatible avec un agent réducteur d'eau de type polymère peigne hydrophile. The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More specifically, the present patent application relates to a fluidity retentive agent compatible with a water-reducing agent of the hydrophilic comb polymer type.

AQUEOUS SOLUTION OF COMBINED (METH) ACRYLIC COMBINED POLYMER WITH A DRY EXTRACT OF MORE THAN 60%, PROCESS FOR PRODUCTION AND USE AS FLUIDIZING AGENT.

La présente invention concerne une solution aqueuse de polymère peigne, disposant d'un squelette de nature (méth)acrylique fonctionnalisé par des chaînes latérales avec des fonctions hydrophiles du type alcoxy ou hydroxy polyalkylène glycol, ladite solution demeurant stable et manipulable à des extraits secs supérieurs à 60 % de son poids. L'invention concerne aussi un procédé de fabrication de telles solutions, de même que leur utilisation comme agent fluidifiant, et des compositions à base de liants hydrauliques les contenant. The present invention relates to an aqueous solution of comb polymer, having a backbone (meth) acrylic functionalized by side chains with hydrophilic functions of the alkoxy or hydroxy polyalkylene glycol type, said solution remaining stable and manipulable to higher dry extracts at 60% of its weight. The invention also relates to a method of manufacturing such solutions, as well as their use as a fluidizing agent, and compositions based on hydraulic binders containing them.

Method for encapsulating oils in an aqueous medium with hase polymer emulsions, products obtained, and uses thereof

The invention relates to a method for producing an aqueous formulation containing at least one oil, that comprises the steps of mixing at least one associative polymer, oil and water, encapsulating the oil by raising the pH to a value higher than 8, optionally precipitating the mixture by lowering the pH to a value lower than 6, and optionally isolating the particles thus obtained by water removal. The invention also relates to aqueous formulations and aqueous dispersions as well as to the solid particles thus obtained.

FLUIDITE RETENTION AGENT FOR HYDRAULIC COMPOSITION COMPATIBLE WITH POLYMER-TYPE WATER-REDUCING AGENT

Fluidity-retaining agent for hydraulic compositions, compatible with a water-reducing agent of the comb polymer type

The invention relates to the technical field of hydraulic compositions, for example compositions of concrete and mortars. More specifically, the present patent application relates to a fluidity-retaining agent compatible with a water-reducing agent of the hydrophilic comb polymer type.

Method for encapsulating oils in an aqueous medium with hase polymer emulsions, products obtained, and uses thereof

The invention consists of a method for manufacturing an aqueous formulation containing at least one oil, and comprising the steps of mixing at least one associative polymer, one oil, and water, encapsulating the oil by increasing the pH to a value greater than 8, potentially precipitating the mixture by reducing the pH to a value less than 6, and potentially isolating the resulting particles by removing the water. The aqueous formulations, as with the aqueous dispersions, and the resulting solid particles constitute other objects of the invention.

USE OF AN ACRYLIC DISPERSANT AS ANTI-EFFLORESCENCE AGENT IN A CEMENTITIOUS MATRIX, MATRIX OBTAINED

L'invention réside dans l'utilisation, au sein d'une matrice à base de liant hydraulique ou de sulfate de calcium ou de ses dérivés, d'une solution aqueuse d'un copolymère hydrosoluble de l'acide (méth)acrylique, d'un monomère vinylique aromatique, et d'un acrylate ou d'un méthacrylate d'alkyle ayant de 1 à 4 atomes de carbone. On améliore ainsi l'esthétique de la pièce finale dont l'efflorescence a disparu, tout en augmentant sa résistance à la compression à 28 jours. The invention lies in the use, within a matrix based on hydraulic binder or calcium sulphate or its derivatives, of an aqueous solution of a water-soluble copolymer of (meth) acrylic acid, an aromatic vinyl monomer, and an alkyl acrylate or methacrylate having 1 to 4 carbon atoms. This improves the aesthetics of the final piece whose efflorescence has disappeared, while increasing its resistance to compression to 28 days.

Method for encapsulating oils in an aqueous medium with hase polymer emulsions, products obtained, and uses thereof

The invention relates to a method for producing an aqueous formulation containing at least one oil, that comprises the steps of mixing at least one associative polymer, oil and water, encapsulating the oil by raising the pH to a value higher than 8, optionally precipitating the mixture by lowering the pH to a value lower than 6, and optionally isolating the particles thus obtained by water removal. The invention also relates to aqueous formulations and aqueous dispersions as well as to the solid particles thus obtained.

Use of a comb polymer combination as an agent for improving the handling of an aqueous hydraulic binder formation

The present invention relates to the use, in the manufacture of an aqueous hydraulic binder formulation, of a combination of at least one comb copolymer having a (meth)acrylic backbone on which side chains ending in a hydrophilic grouping are grafted and at least one comb copolymer having a (meth)acrylic backbone on which side chains ending in a hydrophobic grouping are grafted. The handling of said formulation is eventually improved without causing a segregation phenomenon.

Aqueous solution of a fluid (meth)acrylic comb polymer having a dry matter content greater than 60 %, method for manufacturing same, and use thereof as a fluidizing agent

The present invention relates of an aqueous solution of a comb polymer which has a (meth)acrylic backbone functionalized with side chains having hydrophilic, alkoxy or hydroxy polyalkylene glycol functions; said solution remains stable and can be handled at dry matter contents greater 60% of the weight thereof. The invention also relates to a method for manufacturing such solutions, as well as to the use thereof as fluidizing agents, and to compositions based on hydraulic binders containing said solutions.

Use as an agent improving the workability of an aqueous formulation with a hydraulic binder base, of a (meth)acrylic comb-branched copolymer and an associative acrylic thickener

The present invention pertains to the use, in the manufacture of an aqueous formulation with a hydraulic binder base, of a combination of at least one comb-branched copolymer having a (meth)acrylic skeleton, onto which are grafted side-chains terminated by a hydrophilic group, and at least one ASE acrylic polymer. This results in improving the workability of said formulation, without causing a segregation phenomenon.

USE OF A COMBINATION OF COMBINED POLYMERS AS AN AGENT ENHANCING THE HANDLING OF AQUEOUS FORMULATION BASED ON HYDRAULIC BINDERS.

La présente invention concerne l'utilisation, dans la fabrication d'une formulation aqueuse à base de liants hydrauliques, de combinaison entre au moins un copolymère peignes disposant d'un squelette (méth)acrylique, sur lequel sont greffées des chaînes latérales terminées par un groupement hydrophile, et au moins un copolymère peignes disposant d'un squelette (méth)acrylique, sur lequel sont greffées des chaînes latérales terminées par un groupement hydrophobe. On parvient à améliorer la maniabilité de ladite formulation, sans provoquer de phénomène de ségrégation. The present invention relates to the use, in the manufacture of an aqueous formulation based on hydraulic binders, of a combination between at least one comb copolymer having a (meth)acrylic backbone, on which are grafted side chains terminated by a hydrophilic group, and at least one comb copolymer having a (meth)acrylic backbone, on which are grafted side chains terminated by a hydrophobic group. It is possible to improve the workability of said formulation, without causing any phenomenon of segregation.

Method for encapsulating oils in an aqueous medium with hase polymer emulsions, products obtained and uses thereof

USE OF A RHEOLOGICAL ADDITIVE IN THE MANUFACTURE BY VIBROCOMPACTION OF A FORMULATION BASED ON WATER AND HYDRAULIC BINDER, FORMULATION OBTAINED.

Fluidity-retaining agent for hydraulic compositions, compatible with a water-reducing agent of the comb polymer type

La présente invention concerne le domaine technique des compositions hydrauliques, par exemple les compositions de bétons et de mortiers. Plus précisément, la présente demande de brevet concerne un agent rétenteur de fluidité compatible avec un agent réducteur d'eau de type polymère peigne hydrophile. The present invention relates to the technical field of hydraulic compositions, for example concrete and mortar compositions. More specifically, the present patent application relates to a fluidity retentive agent compatible with a water-reducing agent of the hydrophilic comb polymer type.

Use, as an agent for improving the handleability of an aqueous formulation based on hydraulic binders, of a (meth)acrylic comb copolymer and of an associative acrylic thickener

The present invention relates to the use of a combination of at least one comb copolymer having a (meth)acrylic backbone, onto which are grafted side chains that end with a hydrophilic group, and at least one ASE acrylic polymer, in the manufacture of an aqueous formulation based on hydraulic binders. An improvement in the handleability of said formulation is achieved, without causing a segregation phenomenon.

Improved method of comb polymer production by adding an antioxidant, resulting polymers and their uses

Un método de fabricación de polímeros peine que tienen una cadena (met)acrílica principal y grupos laterales polioxialquilados, que consiste en: a) la producción de una solución que contiene al menos un homopolímero y/o copolímero de ácido (met)acrílico con al menos otro monómero; b) el secado de la solución obtenida en la etapa a), a fin de obtener un homopolímero y/o copolímero de ácido (met)acrílico con al menos otro monómero en estado seco, c) la mezcla del producto en estado seco obtenido de acuerdo con la etapa b) con al menos un alcoxi polioxialquilenglicol en estado fundido, y/o al menos una alcoxi polioxialquilenamina en estado fundido, y/o al menos un óxido de alquileno en estado líquido o gaseoso, d) la funcionalización del homopolímero y/o copolímero de ácido (met)acrílico mediante: - esterificación con al menos un alcoxi polialquilenglicol, - y/o amidificación con al menos una alcoxi polioxialquilenamina, - o etoxilación con al menos un óxido de alquileno, y caracterizado por que se añade un antioxidante durante la etapa a) y/o etapa b) y/o etapa c). A method of manufacturing comb polymers having a main (meth) acrylic chain and polyoxyalkylated side groups, consisting of: a) the production of a solution containing at least one homopolymer and / or copolymer of (meth) acrylic acid with at minus another monomer; b) drying the solution obtained in step a), in order to obtain a homopolymer and / or copolymer of (meth) acrylic acid with at least one other monomer in the dry state, c) the dry product mixture obtained from according to step b) with at least one molten polyoxyalkylene glycol alkoxy, and / or at least one molten polyoxyalkylene amine alkoxy, and / or at least one liquid or gaseous alkylene oxide, d) the functionalization of the homopolymer and / or copolymer of (meth) acrylic acid by: - esterification with at least one polyalkylene glycol alkoxy, - and / or amidification with at least one polyoxyalkylene amine alkoxy, - or ethoxylation with at ...

Aqueous solution of a fluid (meth)acrylic comb polymer having a dry matter content greater than 60 %, method for manufacturing same, and use thereof as a fluidizing agent

The present invention pertains to an aqueous solution of comb-branched polymers, having a (meth)acrylic skeleton functionalized by side-chains with hydrophilic alcoxy- or5 hydroxy-polyalkylene glycol functions, said solution remaining stable and workable at dry solids content levels greater than 60% of its weight. The invention also pertains to a method for manufacturing such solutions, as well as their use as a plasticizing agent, and hydraulic binder-based compositions containing them. [No Fig.]

Method for producing a master mixture based on carbonaceous nanofillers and superplasticiser, and the use thereof in hardenable inorganic systems

Hardenable inorganic systems such as cements, plasters, ceramics or liquid silicates, usable for example in the building trade, construction industry or oil drilling industry. The insertion of carbonaceous nanofillers, such as carbon nanotubes, for reinforcing mechanical properties and improving such systems. A method for producing a master mixture including at least one superplasticizer and carbonaceous nanofillers at a mass ratio of between 0.1% and 25%, preferably between 0.2% and 20%, in relation to the total weight of the master mixture, and also to said master mixture thus obtained and to the use thereof in a hardenable inorganic system with a view to producing materials with improved properties. The disclosure applies to the construction industry, the building trade and the oil drilling industry.