Rhodia Operations

Energy Solutions (us) LLC

Specialty Operations France

Adama Makhteshim, Ltd.

Syensqo Sa

Energysolutions, LLC

David James Wilson

Arnaud Cadix

Subramanian Kesavan

Laurianne Timbart

Mikel Morvan

Mathias Destarac

Gary Woodward

Max Chabert

Gilda Maria Lizarraga

Lingjuan Shen

Pierre-Emmanuel Dufils

Silvia Stoilova

Qi Qu

Jian Zhou

Dominique Labarre

Lichang Zhou

Alexander Lerch

Ruela Talingting Pabalan

Marie-Pierre Labeau

Guillaume Gody

Katerina Karagianni

Zhihua Zhang

Kevan Hatchman

Shailesh Majmudar

Bertrand Pavageau

Fabio Trezzi

Céline Orizet

Homayoun Jamasbi

Man Hua Chen

Bing Hong

Zhenxing Cheng

Dongcheel Lee

An Tran

Vincent Miralles

Chee Fei Chin

Michael Berkovitch

Jia Zhou

Sophie Deroo

Changheon Kang

Sujandi Zhou

Tiffany Chen

Julie Clavier

Eric Van Gramberen

Hamza Chouirfa

Emanuele Di Nicolo

Fan Jiang

Iñigo Gonzalez

Gilad Silbert

Zongming Xiu

Adnan Siddiqui

Hajeeth Thankappan

Ruela Pabalan

The instant invention concerns a process for fragmenting a polymer chain, comprising an oxidative degradation step wherein the polymer chain is contacted with a reduced form of a metal M and an oxidant such as dioxygen, and wherein the polymer carries covalently bound chemical groups acting as a ligand of said reduced form of the metal M. The invention also relates to methods making use of this fragmentation process as a first step of a degradation process of the polymer especially useful for avoiding the negative impact of a polymer to the environment. In this connection, the invention relates to the use of polymers carrying chemical groups acting as a ligand for a reduced form of a metal M, as a polymer biodegradable in an environment wherein the reduced form of a metal M is present.

Process for fragmenting a polymer

The present invention pertains to composition suitable for manufacturing membranes based on vinylidene fluoride (VDF) polymers, to porous membranes thereof, to methods for their manufacture and to uses thereof, especially for the filtration of water phases. Said composition comprising vinylidene fluoride (VDF) polymers and polymer additives comprising zwitterionic moieties delivers outstanding hydrophilization performances of manufactured membranes.

Polymer additive comprising zwitterionic moieties for vinylidene fluoridepolymer based membranes

Processes to prepare aqueous polymer dispersions are provided, as well as compositions thereof, which have high solids content (e.g., 50%) with low viscosity. The process uses a selective hydrophilic macro-RAFT agent of formula (I), and is substantially free of surfactants. This process can be used to make latex polymers with good stability, which can be used widely in coatings (e.g., architectural paints, stone paints, industrial coatings, wood coatings, etc.), adhesives, sealants and mastic compositions.

Process for the preparation of high-solids, low-viscosity latex using selective hydrophilic macro-raft agents

Modification of the rheology of a liquid medium, aqueous or nonaqueous, with polymers in the form of specific particles obtained by grinding (micronizing) a porous macrogel, itself prepared by a process comprising a radical polymerization step which comprises reacting in the presence of pore formers monomers containing monomers bearing at least two ethylenic unsaturations, typically in combination with monomers bearing a single ethylenic unsaturation; a polymerization initiator; and optionally a polymerization control agent. These polymer particles keep other particles in suspension within the liquid medium, and also the stabilized suspensions are obtained.

Rheology modification by porous gel particles

This invention relates to the field of techniques for treating subterranean formations with gels during an oil or gas exploration or production operation, i.e., during drilling, completion, or hydraulic fracking processes. The invention relates in particular to a system making it possible to limit or even inhibit the phenomena known as loss of fluids (wager and/or gas) in an underground formation, particularly in a zone where the temperature is high. More particularly, the invention relates to a suspension (S) comprising:

Suspension of associative polymers for the treatment of underground formations

The present invention relates to the preparation of polymers that are of use in particular as a rheology agent, and are suitable for use in very concentrated saline media, which comprises a step of micellar radical polymerization in which are brought into contact, in an aqueous medium: &#x2014;hydrophilic monomers; &#x2014;hydrophobic monomers in the form of a micellar solution, containing micelles comprising these hydrophobic monomers; &#x2014;a radical polymerization initiator; and &#x2014;preferably an agent for controlling radical polymerization, wherein said micelles comprise at least one surfactant of amphoteric nature. The polymers obtained according to the invention are in particular of use for enhanced oil recovery.

Amphiphilic block polymers soluble in strongly saline medium

A polymer dispersion may include a water soluble copolymer, a water soluble salt, a polyol, and water. A method of preparing a polymer dispersion may include controlled radical polymerization. A method of using the polymer dispersion as a friction reducer in oil field processes.

Polymer dispersion by controlled radical polymerization

The present invention relates to the use of sequential copolymers (P), comprising at least one chain (C) capable of being obtained by micellar polymerization, for keeping solid particles (p) in suspension in a fluid (F) where said chain (C) is soluble.

Suspending agents obtained by micellar polymerization

The present invention relates to a method of inhibiting or control wax formation during stimulation treatment of a well. More specifically, the present invention proposes the use of aqueous polymer dispersions suitable as wax inhibitor compositions which are compatible with aqueous fracturing fluids.

Polymer dispersions for wax inhibition during stimulation treatment

Provided is a method making it possible to ensure a gradual release of polymer chains within a liquid medium, the method comprising bringing the liquid medium into contact with specific solid objects formed by polymer chains soluble in the medium and carrying hydrophobic side groups ensuring physical crosslinking between the polymer chains within the solid objects. The released chains may in particular be used as inhibitors of the formation of inorganic or organic deposits (scale inhibitors) within a liquid medium, typically in the field of oil extraction.

Progressive salting-out of polymer chains in a liquid medium

The present invention relates to the field of oil extraction. More specifically, it relates to a particular polymerization process, which provides access to formulations of polymers that may be used in particular for modifying rheology and fluid loss control during extraction operations and that have a better heat stability.

Gelled aqueous composition for oil extraction

The present invention relates generally to polyelectrolyte-layer forming block copolymers adsorbed at colloid interfaces in aqua solution and compositions and uses thereof. In particular, the present invention relates to agricultural material compositions comprising particles of at least one agricultural material and a polyelectrolyte-layer forming block copolymer. The present invention also relates to non-agricultural material compositions comprising particles of at least one non-agricultural material and a polyelectrolyte-layer forming block co-polymer.

Polyelectrolyte-layer forming block copolymers and compositions and uses thereof

Polymeric systems useful for maintaining particle dispersions for extended periods of time.

Polymeric systems for particle dispersion

The present invention relates to the use of a sequenced polymer as an agent for monitoring the filtrate in a fluid injected under pressure into an oil rock, wherein the fluid comprises solid particles and/or is brought into contact with solid particles within the oil rock after being injected, the polymer comprising at least three blocks, including: at least one first block which is adsorbed, preferably irreversibly, onto at least some of the particles (p); a second block (B) having a composition other than that of the first and a mean molecular weight of more than 10,000 g/mol, and which is soluble in the fluid (F); and at least one third block of type (A) or type (B).

Sequenced polymers for monitoring the filtrate

The present invention relates to a copolymer comprising units of type A deriving from carboxylic acid monomers and units of type B deriving from sulfonic acid monomers, said units of type A and B representing more than 80 mol % of the total moles of units in the copolymer, characterized in that it comprises at least: &#x2014;one first block formed of at least 95 mol % of units of type A and having a degree of polymerization DPcomprised between 5 and 150; and &#x2014;one second block formed of at least 95 mol % of units of type A and B with a molar ratio of units of type A to units of type B greater or equal to 1, wherein said units of type A and units of type B are statistically distributed, said second block having a degree of polymerization DPsuch that DP/DP&#x2265;1. It also relates to new detergent compositions comprising such a copolymer, and to the use of this copolymer in a detergent composition, especially an ADW composition, to prevent, limit or eliminate the filming phenomena.

Copolymer comprising units of type a deriving from carboxylic acid monomers and units of type b deriving from sulfonic acid monomers

Growing community of inventors

Coye la Foret, France

David James Wilson