Arkema France

Centre National De La Recherche Scientifique

Essilor International (compagnie Generale D'optique)

Universite Claude Bernard – Lyon1

Université Pierre Et Marie Curie

Université Paris 7—Denis Diderot

Alchimedics

L'oreal

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Elf Atochem S.a.

Université Pierre Et Marie Curie (Paris 6)

Ecole Superieure De Chimie Physique Electronique De Lyon

Cpe Lyon Fcr

Centre De La Recherche Scientifique

Universitéde Liége

Bernadette Charleux

Stephanie Magnet

Olivier Guerret

Jean-Pierre Vairon

Maud Save

Laurence Couvreur

Jean-Paul Cano

Christophe Bureau

Raber Inoubli

Jean Pinson

Pascale Tardieu

Sylvette Maisonnier

Stéphanie Magnet

Segolene Brusseau

Mohamed Mehdi Chehimi

Christopher Tronche

Tarik Matrab

Christian Perruchot

Eva Cabet-Deliry

Julien Nicolas

Pierre Gerard

Rosangela Pirri

Georges H Wajs

Florence Ricoul

Chloe Thieuleux

Sandrine Denie

Celine Farcet

Lisa Houillot

Muriel Lansalot

François Stoffelbach

Nathaly Vassal

Catherine Lefay

Charlotte Dire

Jutta Rieger

David Lefebvre

Guillaume Delaittre

The present invention relates to a dispersion of polymer particles in a liquid carbon-based medium, the said particles having a flexible polymeric core and being surface-stabilized with a block stabilizing polymer comprising at least one block that is soluble in the said carbon-based medium and at least one block that is insoluble in the said carbon-based medium. The invention also relates to a cosmetic composition comprising the said dispersion, and to a cosmetic treatment process using the said composition.

Dispersion of soft polymer particles, cosmetic composition comprising it and cosmetic treatment method

The present invention relates to a method for manufacturing a chromatography column, in particular for a gas phase chromatography, comprising a stationary phase made from a sol. This method comprises the following steps: The present invention also relates to a capillary column as well as to a microcolumn which may be manufactured according to this method.

Method for manufacturing a gas phase chromatography column and column obtained using such a method

The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the method for preparing same by means of controlled radical polymerization in emulsion in the presence of a specific living macroinitiator derived from a nitroxide. The invention is characterized in that the filamentous particles are obtained in a dispersed aqueous medium by means of the synthesis of said block copolymers, performed by heating the reaction medium at a temperature of 60 to 120&#xb0; C., the final block copolymer containing between 10 and 50 mol. % of the macroinitiator which is water soluble and the hydrophobic monomer conversion rate being at least 50%. According to the invention, the weight ratio of hydrophilic fraction of the filamentous particles is less than 25 wt %.

Filamentous polymer particles and method for preparing same by means of controlled radical polymerisation in emulsion

The invention relates to polymer particles in the form of filaments formed by block copolymers, as well as to the use thereof as rheology modifiers for aqueous or organic solutions. A first aspect of the invention relates to filamentous polymer particles having a length/diameter ratio greater than 100, said particles being formed by block copolymers synthesized by controlled radical emulsion polymerization in emulsion, performed using at least one hydrophobic monomer in the presence of a water-soluble marcoinitiator. The invention is characterized in that the filamentous particles are obtained in an aqueous medium for the synthesis of said block copolymers, performed by heating the reaction medium to a temperature of 60 to 120&#xb0; C., the final block copolymer containing between 10 and 50 mol. % of the water-soluble macroinitiator and the hydrophobic monomer conversion rate being at least 50%. A second aspect of the invention relates to a method for modifying the rheology of an organic or aqueous solution using said filamentous polymer particle.

Filamentous polymer particles and use thereof as rheology modifiers

The invention relates to an amphiphilic block copolymer, to the preparation thereof, and to the use thereof in the form of a self-stabilizing latex. The copolymer has the formula RO&#x2014;[&#x2014;CHCH&#x2014;O&#x2014;]&#x2014;C(&#x2550;O)&#x2014;CRR&#x2014;[CHCRR]&#x2014;S&#x2014;C(&#x2550;S)&#x2014;S&#x2014;Rwhere: Ris a straight or branched alkyl group, an alkenyl group having one or more &#x2014;C&#x2550;C&#x2014; bonds, or an alkynyl group having one or more &#x2014;C&#x2261;C&#x2014; bonds, said groups including 8 to 18 carbon atoms; 20&#x2266;n&#x2266;100; Rand Reach are independently H, an alkyl group with 1 to 4 carbon atoms, or a nitrile group, at least one of Rand Rbeing different than H; Ris a phenyl group or an alkoxycarbonyl group in which the alkoxy group includes 1 to 8 carbon atoms; Ris a hydrogen atom or a methyl radical; and 20&#x2266;m&#x2266;1000. The preparation method comprises: preparing an aqueous solution of a compound R&#x2014;S&#x2014;C(&#x2550;S)&#x2014;S&#x2014;CRR&#x2014;C(&#x2550;O)&#x2014;ORin which Ris R&#x2014;[&#x2014;O&#x2014;CHCH&#x2014;]&#x2014;, Rbeing a hydrophilic group and 20&#x2266;n&#x2266;100; adding to said solution one or more hydrophobic monomers of the formula (II) R&#x2014;CR&#x2550;CHand a free radical polymerization initiator; and heating said aqueous solution to a temperature of 60-90&#xb0; C.

Amphiphilic block copolymer and method for preparing same

The invention relates to a process for the preparation of an aqueous dispersion of polymer particles in an aqueous medium employing a living macroinitiator requiring a reinitiation temperature of less than 100&#xb0; C. Application of the particles obtained in the field of surface coatings.

Method for preparing a polymer particle dispersion in an aqueous medium

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.

Use of copolymers with a composition gradient as stabilizers in emulsion free-radical polymerization

The use of at least one diazonium salt bearing an initiator function, for forming an undercoat obtained by grafting a graft derived from the diazonium salt and bearing an initiator function at the surface of a conductive or semiconductive material on the undercoat, and for forming on the undercoat a polymeric layer obtained by polymerization, in particular free radical polymerization, in situ of at least one monomer, initiated from the initiator function.

Modified surface material, method for preparing same and uses thereof

The invention relates to a method for preparing a living polymer comprising methacrylic and/or methacrylate units using a monofunctional or polyfunctional alkoxyamine consisting in polymerising one or several types of methacrylic an/or methacrylate units.

Method for preparing a living polymer comprising methacrylic and/or methacrylate units

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.

Method for radical emulsion polymerisation using hydrosoluble alkoxyamines

The method of the invention comprises: a) forming a hydrophilic polyurethane prepolymer with isocyanate end groups, by the polyaddition reaction of at least one polyol and at least one diisocyanate in the presence of at least one internal emulsifying agent; b) mixing the polyurethane prepolymer with a photochromic agent; c) adding water or a mixture of water and solvent, under agitation, to the mixture of the polyurethane prepolymer and the photochromic agent, to form an emulsion; and d) adding at least one chain extension agent to the emulsion and performing a chain extension reaction to give the final photochromic polyurethane latex. Application to the production of ophthalmic articles having photochromic properties.

Method for preparing a photochromic polyurethane latex and application to ophthalmic optics

This invention relates to a method for preparing a photochromic latex, photochromic thin films obtained therefrom, and articles coated with such thin films, in particular photochromic ophthalmic lenses.

Method for preparing a latex with photochromic properties and uses thereof, particularly in ophthalmology

A process for the emulsion polymerization in the presence of a stable free radical of at least one monomer which can be polymerized by the radical route, which emulsion comprises a liquid aqueous phase and a liquid organic phase, the aqueous phase comprising at least 50% by weight of water and the liquid organic phase comprising more than 50% by weight of monomer(s) to be polymerized. The invention results, by a rapid controlled polymerization process, in a latex of polymer particles, it being possible for the polymer to comprise acrylate and/or methacrylate blocks.

Emulsion polymerization in the presence of a stable free radical

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Vincennes, France

Bernadette Charleux