Arkema France

Cornell University

Institut National De La Sante Et De La Recherche Medicale

Cyrille Mathieu

Gregory Filou

Guillaume Le

Holger Senff

Arnaud Lemaitre

Karine Huraux

Benoît Brule

Anthony Bonnet

Nicolas Dufaure

Karine Loyen

Jerome Pascal

Nadine Decraemer

Denis Huze

Frédéric Malet

Geoffroy Cammage

Alejandra Reyna-Valencia

Matteo Porotto

Anne Moscona

Hervé Ster

Jean Jacques Flat

Branka Horvat

Jean Laurent Pradel

Barbara Ramfel (Epouse Wiegert)

Christophe Degoulet

Grégory Filou

A method for reducing the crystallization temperature and the melting temperature of a polyamide powder resulting from the polymerization of at least one predominant monomer, in which the reduction in the crystallization temperature is greater than the reduction in the melting temperature, the method including a step of polymerization of the at least one predominant monomer with at least one different minor comonomer polymerized according to the same polymerization process as the at least one predominant monomer, the at least one minor comonomer being chosen from aminocarboxylic acids, diamine/diacid pairs, lactams and/or lactones, and the at least one minor comonomer representing from 0.1% to 20% by weight of the total blend of the monomers(s) and comonomer(s), preferably from 0.5% to 15% by weight of the total blend, preferably from 1% to 10% by weight of the total blend.

Method for increasing the difference between the melting temperature and the crystallization temperature of a polyamide powder

An improved method of grinding polyaryletherketones, providing very good yields and the production of powders of polyaryletherketones with an average diameter below 100 &#x3bc;m having a narrow size distribution with few fine particles (Dv10&#x3e;15 &#x3bc;m). Method of grinding polyaryletherketones of apparent density below 0.9 carried out in a temperature range between 0&#xb0; C. and the glass transition temperature of the polymer measured by DSC, in order to obtain powders having a particle size distribution (diameters by volume) of d10&#x3e;15 &#x3bc;m, 50&#x3c;d50&#x3c;70 &#x3bc;m, 120&#x3c;d90&#x3c;180 &#x3bc;m.

Method of grinding polyaryletherketones

A method for producing a surface coated with a coating having an improved coalescence, the method including: providing a composition comprising from 99.6% to 99.99% by weight of at least one powder of at least one polyarylene ether ketone and 0.01 to 0.4% by weight of a hydrophilic flow agent, the hydrophilic flow agent being hydrophilic silica; depositing the composition onto a surface forming a coated surface; and baking the coated surface to form a film on the surface.

Powder composition of polyarylene ether ketone ketones allowing an excellent castability/coalescence balance suitable for laser sintering

The present invention relates to an improved method of grinding polyaryletherketones, providing very good yields and the production of powders of polyaryletherketones with an average diameter below 100 &#x3bc;m having a narrow size distribution with few fine particles (Dv10&#x3e;15 &#x3bc;m).

Method of grinding poly(aryl ether ketones)

The present invention relates to a method for reducing the crystallization temperature an the melting temperature of a polyamide powder resulting from the polymerization of at least one predominant monomer, in which the reduction in the crystallization temperature is greater than the reduction in the melting temperature, said method comprising a step of polymerization of said at least one predominant monomer with at least one different minor comonomer polymerized according to the same polymerization process as said at least one predominant monomer, said at least one minor comonomer being chosen from aminocarboxylic acids, diamine/diacid pairs, lactams and/or lactones, and said at least one minor comonomer representing from 0.1% to 20% by weight of the total blend of said monomers(s) and comonomer(s), preferably from 0.5% to 15% by weight of said total blend, preferably from 1% to 10% by weight of said total blend.

The present invention concerns a fluorinated polymer composition, methods for producing same, and products that can be produced from said composition. More particularly, the invention concerns a thermoplastic polymer composition comprising the following components A, B and C: A&#x2014;a polyvinylidene fluoride (PVDF) homopolymer comprising a fraction of ultra high molecular weight chains (UHMCF); B&#x2014;a vinylidene fluoride (VDF) elastomeric copolymer and at least one other fluorinated comonomer copolymerisable with VDF, and C&#x2014;a VDF homopolymer having a lower viscosity than component A.

Fluorinated polymer composition

The invention concerns a method for the surface crosslinking of a polymer, in particle form, having one or a plurality of labile hydrogen functions, comprising a step of implementing a crosslinking agent comprising at least two functions likely to react with the labile hydrogen functions of the polymer, the crosslinking method being carried out at a temperature lower than the melting point of the polymer. The invention also concerns a powder particle and the uses of same.

Method for the surface crosslinking of polymer particles

The present application relates to an inhibitor of fusion between a viral membrane from an enveloped virus and a cell membrane, where the viral membrane comprises a fusion mediating protein including a C-terminal peptide. The inhibitor comprises the C-terminal peptide of the fusion mediating protein from an enveloped virus and tocopherol or a derivative or pharmaceutically acceptable salt thereof attached to the C-terminal peptide. Also disclosed is a pharmaceutical composition including the inhibitor as well as methods of inhibiting viral fusion, blocking viral spread, and preventing or treating viral infection, with the inhibitor or pharmaceutical composition.

Inhibitors of fusion between viral and cell membranes as well as compositions and methods of using them

A method for preparing a recyclable polyamide powder, including the following consecutive steps: a) a step of adding 0.01 to 5 wt % of at least one antioxidant in powder form to a mixture including 20 to 95 wt % of polyamide powder and 5 to 80 wt % of liquid, relative to the weight of said mixture, the polyamide powder having a pH in the range from 3 to 8 and a yellowness index of less than 4, measured according to standard ASTM E 313-05, D1925, the liquid being a non-solvent for polyamide at a temperature between 5&#xb0; C. and the boiling temperature Tof said liquid; b) a step of homogenizing the mixture obtained in step a); c) a step of recovering powder isolated from the liquid.

Method for preparing a recyclable polyamide powder

The present invention relates to a method for increasing the recyclability of a polyamide in a sintering process, wherein at least 4000 ppm of at least one acid is incorporated in the polyamide, said acid being selected from: the acids of general formula HxPyOz in which x, y and z are integers selected in the range from 1 to 7, boric acid, the salts of these acids, their esters, their anhydrides and mixtures thereof.

Method for increasing the recyclability of a polyamide used in sintering

The invention relates to a method for the production of biosourced aliphatic polyester powder having a volume median diameter of less than 30 &#x3bc;m, comprising: a step consisting in supplying an aliphatic polyester having an inherent viscosity of less than 0.5 dl/g; and a step consisting in grinding the polyester, so as to obtain a polyester powder having a volume median diameter of less than 30 &#x3bc;m. The invention also relates to a powder in which the particles have a volume median diameter of less than 30 &#x3bc;m and are impregnated with a compound selected from among polyols and/or carboxylic acids. The invention further relates to the use of the powder for the production of cosmetic, pharmaceutical and perfume products.

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Rouen, France

Cyrille Mathieu