Abstract: A method for manufacturing a water-soluble acrylic polymer, fully or partially neutralized by at least one monovalent agent and at least one divalent agent, by contacting the monovalent agent, the divalent agent, and a water-soluble acrylic polymer in acid form in an aqueous solution. Polymer obtained. The polymer obtained is limpid, and advantageously has a polymolecularity index between 1.5 and 3.0 for a molecular weight between 5,000 g/mol and 15,000 g/mol.

Abstract: The invention pertains to a new method for formulating any agrochemical active ingredient so as to protect the user, protect this active ingredient from outside stresses, and control its release kinetics. It relies on the use of acrylic and thickening emulsions with a pH greater than five and containing hydrophobic groups in order to trap said active ingredient. The invention also pertains to the various embodiments of the active ingredient thereby formulated: a mixture in water of that active ingredient with these thickening emotions, a dispersion of solid particles of these polymers and this active ingredient after a certification, and the solid particles obtained in a dried state after the water has been removed. Finally, the invention pertains to the use of these various formulations in order to protect and active ingredient, protect its user, and slow its release kinetics.

Abstract: A subject-matter of the invention is alkoxyamines resulting from ?-phosphorated nitroxides corresponding to the formula: in which R represents an alkyl radical having a number of carbon atoms ranging from 1 to 3, R1 represents a hydrogen atom or a residue: in which R3 represents an alkyl radical having a number of carbon atoms ranging from 1 to 20, and R2 represents a hydrogen atom, an alkyl radical having a number of carbon atoms ranging from 1 to 8, a phenyl radical, an alkali metal, such as Li, Na or K, H4N+, Bu4N+ or Bu3HN+, exhibiting a kinetic dissociation constant kd, measured at 120° C. by EPR, of greater than 0.05 s?1. These compounds can be used as initiators for the (co)polymerizations of at least one monomer which can be polymerized by the radical route.

Abstract: The present invention relates to a thermoset material with improved impact resistance comprising, by weight: •99 to 20% of a thermoset resin, •1 to 80% of an impact modifier comprising at least one copolymer chosen from copolymers comprising A-B-C and A-B blocks, in which: each block is connected to the other by means of a covalent bond or of an intermediate molecule connected to one of the blocks via a covalent bond and to the other block via another covalent bond, A is a copolymer of methyl methacrylate and of at least one water-soluble monomer, C is either (i) a PMMA (homopolymer or copolymer) this PMMA comprising optionally a water-soluble monomer or (ii) a polymer based on vinyl monomers or mixture of vinyl monomers, B is incompatible or partially compatible with the thermoset resin and incompatible with the A block and the optional C block and its glass transition temperature Tg is less than the operating temperature of the thermoset material.

Abstract: The invention pertains to the use as a coupling agent, in a method for manufacturing self-binding particles by grinding at least one latex binder and at least one mineral material in an aqueous medium, of an aqueous solution of a fully or partially acidic water-soluble copolymer, present during the step of grinding, wherein the copolymer is made up of at least one ethylenically-unsaturated anionic monomer, and at least one ethylenically-unsaturated oxyalkylated monomer terminated by a hydrophobic alkyl, alkylaryl, arylakyl, or aryl chain having 10 to 32 carbon atoms.

Abstract: The invention concerns to the use, as an agent improving the thermal stability of (meth)acrylic comb polymers of a macromonomer whose formula (I) is: R-(A-O)m—(B—O)n—R???(I) wherein both m and n are non-zero and A and B designate alkyl groups having 2 to 4 carbon atoms, but different from one another. The invention further pertains to the implementation of the polymers obtained, as agents improving the thermal stability of the plastic compositions that contain them.

Abstract: A method for preparing a polymeric material including a multiblock copolymer with n blocks, where n is an integer no lower than 2, which method comprises at least one cycle of steps including (a) a step of synthesising a block by performing controlled free-radical polymerisation of one or more free-radical polymerisable monomers, and (b) a step of polymerising the monomers that were not converted during step (a) into a polymer having a number-average molecular weight lower than the number-average molecular weight of said block, wherein said cycle of steps is carried out at least for the (n?1) first blocks.

Abstract: The invention pertains to a new method for formulating active fragrance ingredients in such a way as to protect them and to slow the evaporation method of said active ingredients. It relies upon the use of thickening acrylic emulsions, at a pH above 5 and containing hydrophobic groups in order to trap said active ingredients. The invention also pertains to various methods of realizing the active ingredients thus formulated: a mixture in water of these active ingredients with thickening emulsions, dispersion of solid particles of these polymers and of these active ingredients after acidification, and solid particles obtained in a dry state after water is eliminated. Finally, the invention pertains to the use of these various formulations in order to protect an active ingredient and slow its evaporation kinetic.

Abstract: The invention pertains to improving the workability of an aqueous formulation with a hydraulic binder base using a combination between 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 comb-branched copolymer having a (meth)acrylic skeleton, onto which are grafted side-chains terminated by a hydrophobic group.

Abstract: The invention resides in the use in a paint of a calcium carbonate characterised in that it is obtained by dry-grinding, firstly, and in that it is dry-ground in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alcoxy or hydroxy polyalkyleneglycol group, secondly. The invention also concerns the paints thus obtained.

Abstract: The invention pertains to a new method for formulating pharmaceutical active ingredients in such a way as to protect them when ingested orally, and to allow for the controlling of the release of the active ingredient in the intestine. It relies upon the use of thickening acrylic emulsions with a pH greater than 5, containing hydrophobic groups, in order to encapsulate the pharmaceutical active ingredients for the purpose of encouraging their passage through the gastrointestinal barrier, while controlling the release kinetics of said active ingredients.

Abstract: The invention resides in the use, as an agent reducing the viscosity of a thermoplastic or thermosetting paste filled with a calcium carbonate, of a calcium carbonate characterised in that it is obtained by dry-grinding, firstly, and in that it is dry-ground in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alcoxy or hydroxy polyalkyleneglycol group, secondly. The invention also concerns the filled thermoplastic and thermosetting pastes obtained in this manner.

Abstract: The invention firstly concerns the use as a compatibilising agent, in a process to manufacture a chlorinated thermoplastic resin filled with a mineral material, of a comb polymer having at least one anionic monomer with ethylenic unsaturation, to which is grafted at least one polyalkylene oxide group. The invention also concerns the chlorinated thermoplastic materials thus obtained, which have an improved compatibility between the filler and the chlorinated thermoplastic resin, whilst reducing the quantity of compatibilising agents as used in the chlorinated and filled thermoplastic materials according to the prior art, where the said compatibilising agents used in the prior art were essentially fatty acids, and more specifically stearic acid or its salts.

Abstract: The present invention relates to a linear ethylenic block copolymer comprising in each block at least one ionic hydrophilic unit, which may be different from one block to another, the said ionic hydrophilic unit being present in each block in a proportion of from 2% to 100% by weight relative to the weight of the said block. The invention also relates to a cosmetic or pharmaceutical composition comprising such a copolymer, and also to a cosmetic process for making up or caring for keratin materials using the said composition.

Abstract: The present invention describes the use of copolymers with a composition gradient as sole stabilizer in emulsion free-radical polymerization. The copolymers of the invention are prepared via controlled free-radical polymerization and comprise at least one hydrophilic monomer such as acrylic acid and at least one hydrophobic monomer such as styrene.

Abstract: The present invention describes linear or star block copolymers, their process of preparation and their use in adhesive compositions, in particular as pressure-sensitive adhesive. The copolymers of the invention are prepared by controlled radical polymerization by nitroxides; they exhibit at least one soft block with a Tg of less than 0° C. and at least one hard block with a Tg of greater than ambient temperature.

Abstract: The invention resides in the use in a composition with a hydraulic binder base, of a calcium carbonate characterised in that it is obtained by dry-grinding, firstly, and in that it is dry-ground in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alcoxy or hydroxy polyalkyleneglycol group, secondly. The invention also concerns the compositions with a hydraulic binder base thus obtained.

Abstract: The present invention relates to a process for radical emulsion, miniemulsion or microemulsion polymerization employing at least one water-soluble alkoxyamine. This process makes it possible to prepare multiblock (co)polymers, in particular diblock and triblock (co)polymers.

Abstract: The present invention relates to a linear ethylenic block copolymer comprising in each block at least one ionic hydrophilic unit, which may be different from one block to another, the said ionic hydrophilic unit being present in each block in a proportion of from 2% to 100% by weight relative to the weight of the said block. The invention also relates to a cosmetic or pharmaceutical composition comprising such a copolymer, and also to a cosmetic process for making up or caring for keratin materials using the said composition.

Abstract: The present invention relates to the use of composites based on carbon nanotubes as viscosity enhancers for aqueous solutions, characterized in that said composite comprises carbon nanotubes (CNTs) and at least one hydrophilic (co) polymer. More particularly, the invention relates to the use of the composites described above as viscosity enhancers in industrial sectors such as, especially, the papermaking sector, and in particular for coating paper and for weighting paper, in the oil sector, or else in the paint, water-treatment, detergent, ceramic, cement, hydraulic-binder, public-works, ink, varnish and textile-sizing sectors.