Abstract: The present invention relates to the formation of a gel within a medium M, in particular within an underground formation, which comprises the following steps: (EI) a basic compound C is added to a fluid latex L comprising dispersed particles of a polymer P, bearing ester side functions, said basic compound C being added in an amount suitable for hydrolysing at least one part of said ester side functions into carboxylic acid and/or alcohol functions, as a result of which a modified latex L? is obtained, the viscosity of which gradually increases with time from the addition of the compound C up to the formation of a gel; then (E2) the resulting modified latex is introduced into the medium M before the formation of the gel and the gel is left to form within the medium M.

Abstract: A method for modifying the properties of a suspension of solid or liquid particles in an aqueous medium, includes the step of adding to the suspension or to the aqueous medium a polymer prepared by inverse emulsion polymerization of monomers Ab, comprising a betaine group, and of nonionic monomers Ba included in an aqueous phase dispersed in the form of droplets in a hydrophobic external phase, wherein the molar ratio of the monomers Ab to the monomers Ba is from about 4/96 to about 40/60, the polymer exhibits an intrinsic viscosity of greater than 600 mL/g, the reduced specific viscosity being measured by dissolving the polymer in a 20% by weight aqueous NaCl solution.

Abstract: A process for the preparation of an elastomer capable of swelling in oil and/or in water and brine comprising the steps of: a) making an aqueous inverse emulsion of particles of a polymer comprising a betaine group prepared by inverse emulsion polymerization of monomers Ab comprising a betaine group, optionally other monomers Ba and a small quantity of polyvalent, preferably divalent or trivalent monomers Ca, comprised in an aqueous phase dispersed in the form of droplets in a hydrophobic external phase having hydrophobic surfactants, the molar ratio of the monomers Ab to the optional monomers Ba being between 4/96 and 40/60, preferably 7/93 and 30/70, the molar ratio of the polyvalent, preferably divalent or trivalent monomers Ca per mole of polymer being between 1.5 and 10, preferably between 2 and 4, and b) compounding said elastomer with the aqueous inverse emulsion obtained by step a).

Abstract: The invention relates to a composition for processing and/or modifying surfaces, in particular hard surfaces. The composition includes a synthetic copolymer that comprises cationic units and units derived from a vinyl-lactam.

Abstract: The present invention relates to the formation of a gel within a medium M, in particular within an underground formation, which comprises the following steps: (EI) a basic compound C is added to a fluid latex L comprising dispersed particles of a polymer P, bearing ester side functions, said basic compound C being added in an amount suitable for hydrolysing at least one part of said ester side functions into carboxylic acid and/or alcohol functions, as a result of which a modified latex L? is obtained, the viscosity of which gradually increases with time from the addition of the compound C up to the formation of a gel; then (E2) the resulting modified latex is introduced into the medium M before the formation of the gel and the gel is left to form within the medium M.

Abstract: The present invention provides a new copolymer comprising zwitterionic units and other units, a new composition comprising the copolymer, and the use of the copolymer or the compositions for treating or modifying surfaces.

Abstract: The invention relates to a copolymer having a backbone that is obtained by radical polymerisation of: a fatty body (A) comprising unsaturations and/or hydroxyl functions; and at least one monomer (B) including at least one function that can be polymerised by means of radical polymerisation and comprising either (i) at least one linear or branched alkyl chain having preferably between 16 and 44 carbon atoms, and more preferably at least 18 carbon atoms, e.g. at least 20 carbon atoms, in particular 22 carbon atoms or 44 carbon atoms, or (ii) a reactive function. The invention also relates to a method for modifying the rheological properties of an non-aqueous medium with the addition of a copolymer of the invention. The invention further relates to a composition formed totally or partially by a copolymer of the invention. Preferably, the composition is an emulsifiable composition. Furthermore, the invention relates to a composition comprising a copolymer of the invention and an emulsifying agent.

Abstract: The invention relates to a copolymer including betaininc units and hydrophobic and/or amphiphile units. The invention also relates to a method for preparing a copolymer including betaininc units and hydrophobic and/or amphiphile units, by controlled micellar polymerisation. The invention further relates to the uses of the copolymer. The copolymer is particularly used for increasing the viscosity of saline aqueous compositions.

Abstract: The present invention relates to a process which comprises preparing polymers. The process uses an appropriate installation, and may comprise determining at least one parameter of a physical and/or chemical conversion. The invention also relates to a corresponding screening process. According to this process, a polymerization reaction medium is made to flow in a tubular flow member.

Abstract: The present invention relates to a cosmetic composition that includes an amphiphilic zwitterionic copolymer. The amphiphilic zwitterionic copolymer can particularly be used for imparting rheological properties, in particular a beneficial texture, to said composition and/or to the foam resulting from said composition.

Abstract: A process for the preparation of an elastomer capable of swelling in oil and/or in water and brine comprising the steps of: a) making an aqueous inverse emulsion of particles of a polymer comprising a betaine group prepared by inverse emulsion polymerization of monomers Ab comprising a betaine group, optionally other monomers Ba and a small quantity of polyvalent, preferably divalent or trivalent monomers Ca, comprised in an aqueous phase dispersed in the form of droplets in a hydrophobic external phase having hydrophobic surfactants, the molar ratio of the monomers Ab to the optional monomers Ba being between 4/96 and 40/60, preferably 7/93 and 30/70, the molar ratio of the polyvalent, preferably divalent or trivalent monomers Ca per mole of polymer being between 1.5 and 10, preferably between 2 and 4, and b) compounding said elastomer with the aqueous inverse emulsion obtained by step a).

Abstract: The invention relates to a novel copolymer containing vinyl-pyrrolidone units. The copolymer further includes units of the betaine type. The invention further relates to the use of the copolymer in compositions for drying dishes, said polymer particularly improving the drying thereof.

Abstract: The invention relates to a composition for processing and/or modifying surfaces, in particular hard surfaces. The composition includes a synthetic copolymer that comprises cationic units and units derived from a vinyl-lactam.

Abstract: The present invention relates to a hard surface cleaning composition comprising a copolymer, wherein said copolymer comprises a zwitterionic unit A or a mixture thereof and another unit B or a mixture thereof, wherein said unit A comprises a betaine group or a mixture thereof and wherein said betaine group of said unit A is a sulphobetaine group or a mixture thereof, and wherein said unit B is derived from vinyl-pyrrolidone.

Abstract: A method for modifying the properties of a suspension of solid or liquid particles in an aqueous medium, includes the step of adding to the suspension or to the aqueous medium a polymer prepared by inverse emulsion polymerization of monomers Ab, comprising a betaine group, and of nonionic monomers Ba included in an aqueous phase dispersed in the form of droplets in a hydrophobic external phase, wherein the molar ratio of the monomers Ab to the monomers Ba is from about 4/96 to about 40/60, the polymer exhibits an intrinsic viscosity of greater than 600 mL/g, the reduced specific viscosity being measured by dissolving the polymer in a 20% by weight aqueous NaCl solution.

Abstract: The present invention relates to a process which comprises preparing polymers. The process uses an appropriate installation, and may comprise determining at least one parameter of a physical and/or chemical conversion. The invention also relates to a corresponding screening process. According to this process, a polymerization reaction medium is made to flow in a tubular flow member (12).

Abstract: The invention relates to a copolymer including betaininc units and hydrophobic and/or amphiphile units. The invention also relates to a method for preparing a copolymer including betaininc units and hydrophobic and/or amphiphile units, by controlled micellar polymerisation. The invention further relates to the uses of the copolymer. The copolymer is particularly used for increasing the viscosity of saline aqueous compositions.

Abstract: The present invention provides a new copolymer comprising zwitterionic units and other units, a new composition comprising the copolymer, and the use of the copolymer or the compositions for treating or modifying surfaces.