Rhodia Chimie

Rhodia Operations

Pascal Herve

Mathias Destarac

Bruno Thierry Bavouzet

Agnieszka Zofia Wilczewska

Lawrence Alan Hough

Olivier Back

Pierre Hennaux

Wojciech Bzducha

Jian Zhou

Mathieu Joanicot

Andrew Douglass

Olivier Anthony

Rose Ndong

Inigo Gonzalez

Monique Adamy

Natalie Cadena

Philippe Marion

Daniel Taton

Eric Roche

Sylvie Touzet

Franck Touraud

Christophe Paulo

Roland Durand

Mare Labeille

Ericka Park

Mary O'Rourke

Jochen Beyermann

Mary O'rourke

Methods of acidizing a subterranean formation penetrated by a wellbore that include the steps of (a) injecting into the wellbore at a pressure below subterranean formation fracturing pressure a treatment fluid having a first viscosity and including an aqueous acid and a gelling agent selected from the group consisting of Formulas I-XI and combinations thereof; (b) forming at least one void in the subterranean formation with the treatment fluid; and (c) allowing the treatment fluid to attain a second viscosity that is greater than the first viscosity.

Method of acidizing a subterranean formation comprising a gelling agent

The present invention relates to a new process for synthesizing an amido alkyl betaine starting from a linear alcohol having from 8 to 22 carbon atoms, to an amido alkyl betaine prepared by the process with increased viscosity in water, and also to use thereof as a viscoelastic surfactant in oil and gas applications and home personal care applications. The present invention also relates to a process for synthesizing an amido amine starting from a linear alcohol having from 8 to 22 carbon atoms, and to an amido amine prepared by the process.

Process for synthesizing an amido alkyl betaine starting from an alcohol, an amido alkyl betaine prepared by the process with increased viscosity, and use thereof as a viscoelastic surfactant

A polymer includes (a) one or more first monomeric units, each independently comprising at least one bicycloheptyl-polyether, bicycloheptenyl-polyether or branched (C-C)alkyl-polyether group per monomeric unit, wherein the bicycloheptyl-polyether or bicycloheptenyl-polyether group may optionally be substituted on one or more ring carbon atoms by one or two (C-C)alkyl groups per carbon atom, and (b) one or more second monomeric units, each independently comprising at least one pendant linear or branched (C-C)alkyl-polyether group per monomeric unit, provided that the first and second monomeric units cannot both comprise a branched (C-C)alkyl-polyether group and is useful as a component in liquid compositions, such as aqueous latex coating compositions, personal care compositions, home care compositions, and institutional or industrial care compositions.

Rheology modifier polymer

Composition including freeze thaw stability polymer such as a copolymer having a weight average molecular weight of at least about 30,000 grams per mole, a blend of a first polymer and a second polymer, a crosslinked alkali swellable acrylate copolymer, or at least one polymerizable reactive alkoxylated acrylate monomer. The copolymer has one or more first monomeric units and one or more second monomeric units. The one or more first monomeric units each independently including at least one bicycloheptyl-polyether, bicycloheptenyl-polyether or branched (C-C)alkyl-polyether group per monomeric unit. The bicycloheptyl-polyether or bicycloheptenyl-polyether group may optionally be substituted on one or more ring carbon atoms by one or two (C-C)alkyl groups per carbon atom. The one or more second monomeric units each independently including at least one pendant linear or branched (C-C)alkyl-polyether group per monomeric unit. The first and second monomeric units do not both have branched (C-C)alkyl-polyether group.

Compositions with freeze thaw stability

The invention relates to a process for the preparation of particles based on a thermoplastic polymer with a mean diameter of less than 1 mm. The process of the invention comprises more particularly a stage of preparation of a composition comprising the thermoplastic polymer and an additive, in the molten state, of cooling the composition and of disintegration of the thermoplastic polymer dispersion.

Process for the preparation of particles based on a thermoplastic polymer and powder thus obtained

Controlled geometry particles of thermoplastic polymers are prepared from compositions containing the thermoplastic polymer and two additives, in the molten state, by cooling the molten composition and disintegrating the resulting dispersion of thermoplastic polymer; powders obtained therefrom advantageously have mean particle diameters ranging from 0.1 to 800 &#x3bc;m and are useful additives in, e.g., paints and coatings.

Preparation of thermoplastic polymer particles having controlled geometry and powders obtained therefrom

The present invention relates to a cosmetic composition comprising at least one diblock copolymer, as well as to the use of the said diblock copolymer as a modifier of properties of cosmetic compositions, more preferably of compositions for the skin and/or the hair. The diblock copolymer comprises two blocks, block A and block B, wherein block A is a polycationic block and block B is a neutral block.

Cosmetic composition comprising a block copolymer

The invention relates to particles comprising: at least one ionically-charged water-soluble polymer; at least one surfactant having an ionic charge opposite to that of said polymer; and at least one water-soluble block copolymer having at least one non-ionic hydrophilic block and at least one non-ionic hydrophobic or ionic block. The invention also relates to a method of obtaining such particles consisting in: preparing a first aqueous mixture comprising the water-soluble, ionically-charged polymer and, if necessary, the water-soluble block copolymer if said copolymer has the same charge; subsequently, a second mixture is added to the above mixture, said second mixture comprising the surfactant and, if necessary, the water-soluble block copolymer if said copolymer has the same charge as the surfactant or if it is not ionically charged. Furthermore, the invention relates to the use of water-soluble block copolymers as an agent for stabilizing particles with a mesophase-forming internal structure, the internal structure of the resulting particles forming the same mesophase.

Particles having an organized internal structure which are dispersed in an aqueous phase, the preparation thereof and use of same

The invention relates to a formulation comprising an ionic compound and a polyionic polymer. The invention more specifically relates to an improved formulation thereof, further comprising a copolymer. The improved formulation avoids phase-separation of colloidal particles comprising the ionic compound and the polyionic polymer. The formulation comprises a copolymer comprising two moieties A and B, wherein moiety A is polyionic in the pH conditions of the formulation, and moiety B is neutral in the pH conditions of the formulation.

Formulation comprising an ionic compound, a polyionic polymer, and a block copolymer

The invention relates to a method for depositing a polymer onto a surface, by applying an aqueous composition, preferably an aqueous composition, onto said surface. The invention also relates to a method for making the composition. The composition comprise a block copolymer, comprising at least two blocks A and B, wherein block A is a polyionic block and block B is a neutral block.

Method for depositing a polymer onto a surface by applying a composition onto said surface

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West Windsor, NJ, United States of America

Pascal Herve