Rhodia Operations

The Procter Gamble Company

Chi-Thanh Vuong

Arnaud Cadix

Marie-Pierre Labeau

Olivier Anthony

Stefano Scialla

Bruno Langlois

Evelyne Prat

Herve Adam

Galder Cristobal

Luca Sarcinelli

Rabih Rached

Marc Francois Theophile Evers

Denis Bendejacq

Marc Balastre

Florence Lambert

David Monin

Bertrand Pavageau

Annick Julia Oscar Mertens

Marie Pierre Labeau

Regan Crooks

Veronique Geoffroy

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.

Treatment of underground formations with gels

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 A, comprising a betaine group, and of nonionic monomers Bincluded in an aqueous phase dispersed in the form of droplets in a hydrophobic external phase, wherein the molar ratio of the monomers Ato the monomers Bis 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.

Method for modifying the properties of an aqueous suspension

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 Acomprising a betaine group, optionally other monomers Band a small quantity of polyvalent, preferably divalent or trivalent monomers C, 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 Ato the optional monomers Bbeing between 4/96 and 40/60, preferably 7/93 and 30/70, the molar ratio of the polyvalent, preferably divalent or trivalent monomers Cper 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).

Expandable elastomeric material in the presence of water or oil

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.

Copolymer for processing or modifying surfaces

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.

Copolymer containing zwitterionic units and other units, composition comprising the copolymer, and use

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.

Copolymer including betaine units and hydrophobic and/or amphiphilic units, method for preparing same and uses thereof

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.

Process for preparing a polymer

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.

Growing community of inventors

Lognes, France

Chi-Thanh Vuong