Arkema France

Atofina

Institut National Des Sciences Appliquees De Lyon

Thierry Briffaud

Gilles Hochstetter

Philippe Blondel

Mathieu Capelot

Pierre Nogues

Nicolas Dufaure

Annett Linemann

Christophe Lacroix

Patrick Dang

Benjamin Saillard

Hermann Josef Hilgers

Helene Egret

Jean-Luc Dubois

Thibaut Montanari

Guillaume Le

Jean-Luc Couturier

Jean-Jacques Flat

Quentin P Pineau

Karine Loyen

Michael Werth

Michel Glotin

Yves Deyrail

Frédéric Malet

Marc Audenaert

Reinhard Linemann

Vincent Ferreiro

Jean-François Devaux

Heike Faulhammer

Emilie Goncalves

François Fernagut

Didier Roumilhac

Maliha Khusrawy

Stefania Cassiano Gaspar

Laure Berdin

Stefânia Cassiano Gaspar

Yves Aubert

Francois Fernagut

Hermann Hilgers

Lise Deves

Joël Verger

Fabienne Olivier-chanu

Alain Rousseau

Fabrice Glasson

Jérôme Dupuy

Hélène Egret

Matsuno Shinya

Blondel Philippe

Pineau Quentin

Héléne Egret

Annett Linnemann

Célia Paillares

Thierry Lefebvre

Nicolas Alzonne

A composition including at least one polyamide polymer obtained from at least one reactive polyamide prepolymer including at least one chain extender (PA-All-PA), the polyamide polymer being prepared at a temperature Tno lower than the temperature melting temperature or glass transition temperature of the polymer and having a mean molecular weight Mn. The composition has a melt viscosity which can be modulated according to the temperature to which the composition is exposed, wherein the temperature is between Tand T, Tand Tbeing higher than T, and the melt viscosity ηor η'observed at the temperature Tor T, respectively, being lower than the melt viscosity ηor ηof the polyamide polymer, which does not include a chain extender and has the same mean molecular weight Mn(PA) observed at the same temperature Tor T. The composition includes one or more polyamides.

Thermoplastic composition made from a polyamide polymer obtained from a prepolymer and a chain extender and manufacturing method

A process for manufacturing a transparent polyamide including a step of polycondensation of a mixture of monomers including at least one dicarboxylic acid and at least one cycloaliphatic diamine, in which the cycloaliphatic diamine includes two rings linked by an alkylene group including 1 to 6 carbon atoms, each ring being substituted by an amine group and at least one alkyl group, which may be identical or different, including 1 to 6 carbon atoms, wherein the diamine decomposes into six isomer fractions when it is subjected to analysis by gas chromatography on a nonpolar column and, when the isomer fractions are named isomer fractions I to VI in their order of elution, the mass content Fof fraction I of the cycloaliphatic diamine does not exceed 35%. A transparent polyamide capable of being obtained by the process, and to articles obtained from such a polyamide or from such a formulation.

Method for the production of transparent polyamides

The present invention concerns an impregnated fibrous material comprising at least one continuous-fiber fibrous material in the form of a roving or a plurality of parallel rovings and at least one thermoplastic polymer matrix, characterized in that said at least one thermoplastic polymer is an amorphous or semi-crystalline polymer having a glass transition temperature such that Tg≥40° C., especially Tg≥100° C., in particular ≥120° C., the fiber content of said impregnated fibrous material being from 45 to 65% by volume, preferably from 50 to 60% by volume, especially from 54 to 60% by volume, the number-average molecular mass Mn of said thermoplastic polymer being from 11,000 to 25,000 g/mol, the melt viscosity of said thermoplastic polymer being from 80 to 1500 Pa·s, as measured by plane-plane rheology at 1 Hz and 2% deformation, at a temperature of Tg+220° C.

Fibrous material impregnated with thermoplastic polymer of optimum molecular mass and viscosity and method for the production thereof

The invention relates to the use of a composition comprising at least one polyamide, of which at least one is a semicrystalline copolyamide comprising at least one minor motif resulting from the polycondensation of: at least one diamine with at least one polymerised fatty acid, in particular a fatty acid dimer; or at least one diamine dimer with at least one carboxylic acid; or at least one amino acid dimer; or mixtures of same, as a sealing coating in a pipe containing oil or gas, said pipe being used in the operation of offshore oil or gas deposits.

Polyamide-based composition for pipes containing oil or gas

The invention relates to a structure comprising at least one layer (1) comprising a BACT/XT copolyamide in which: &#x2014;BACT is a unit with an amide moiety having a molar ratio of between 20 and 70%, preferably between 25 and 60%, and more preferably between 35 and 55%, where BAC is chosen from 1,3-bis (aminomethyl) cyclohexyl (1,3 BAC), 1,4-bis (aminomethyl) cyclohexyl (1,4 BAC) and a mixture of same, and T is terephthalic acid, &#x2014;XT is a unit with an amide moiety having a molar ratio of between 30 and 80%, preferably between 40 and 75%, and more preferably between 45 and 65%, where X is a C9 to C18, preferably C9, C10, C11 and C12, linear aliphatic diamine, and where T is terephthalic acid, preferably a C10, C11 and C12 terephthalic acid.

Barrier structure made from BACT/XT copolyamide with a high Tg

A composition including at least one polyamide polymer obtained from at least one reactive polyamide prepolymer including at least one chain extender (PA-All-PA), the polyamide polymer being prepared at a temperature Tno lower than the temperature melting temperature or glass transition temperature of the polymer and having a mean molecular weight Mn. The composition has a melt viscosity which can be modulated according to the temperature to which the composition is exposed, wherein the temperature is between Tand T, Tand Tbeing higher than T, and the melt viscosity &#x3b7;or &#x3b7;'observed at the temperature Tor T, respectively, being lower than the melt viscosity &#x3b7;or &#x3b7;of the polyamide polymer, which does not include a chain extender and has the same mean molecular weight Mn(PA) observed at the same temperature Tor T. The composition includes one or more polyamides.

A barrier structure intended for the storage and/or transport of fluids including at least one barrier layer (1) including an MXDT/XT copolyamide in which: MXDT is an amide unit present in a molar ratio of between 5 and 45%, preferably between 15 and 45%, and more preferably between 20 and 45%, where MXD represents m-xylylenediamine (MXD) and T represents terephthalic acid, XT is a majority amide unit present in a molar ratio of between 55 and 95%, preferably between 55 and 85%, and more preferably between 55 and 80%, where X is a C9 to C18, preferably C9, C10, C11 and C12, linear aliphatic diamine, and where T is terephthalic acid, said copolyamide having a melting point: 250&#xb0; C.&#x3c;T&#x2264;300&#xb0; C. as determined according to standard ISO 1 1357-3 (2013).

Barrier structure made from MXDT/XT copolyamide with a high Tg

A barrier structure for the storage and/or transport of fluids, including at least one barrier layer (1) including an MPMDT/XT copolyamide in which: MPMDT is a unit with an amide motif having a molar ratio of between 5 and 50%, particularly between 5 and 45%, preferably between 15 and 45%, more preferably between 20 and 45%, where MPMD is 2-methyl pentamethylene diamine (MPMD) and T is terephthalic acid, XT being a unit with a majority amide motif having a molar ratio of between 50 and 95%, particularly between 55 and 95%, preferably between 55 and 85%, more preferably between 55 and 80%, where X is a C9 to C18, preferably C9, C10, C11 and C12, linear aliphatic diamine, and where T is terephthalic acid, the copolyamide having a melting point of 250&#xb0; C.&#x3c;T&#x2264;300&#xb0; C. as determined according to the ISO norm 1 1357-3 (2013).

Barrier structure based on MPMDT/XT copolyamide with a high Tg

The invention concerns a method for producing polyamide from an amino ester of formula NH&#x2014;(CH)&#x2014;COOR, in which R represents an alkyl group and n represents an integer ranging from 5 to 14, comprising:

Polyamide synthesis method

The present invention relates to an extrudable polymer composition comprising: This invention relates in particular to the use of said composition in extrusion processes for manufacturing vapour-permeable objects.

Polymer composition that can be extruded into a vapour-permeable object

The present invention relates to a composition which comprises at least one &#x3b1;,&#x3c9;-amino-alkanoic acid or ester and at least one alkanoic ester or acid, characterised in that: the &#x3b1;,&#x3c9;-amino-alkanoic acid or ester has formula HN&#x2014;(CH)COOR, wherein n=9 to 13 and R is an alkyl group or a hydrogen; the alkanoic ester or acid has formula R&#x2014;COOR, wherein Ris a straight or branched alkyl group with formula CHor CH, wherein m=6 to 20 and Ris an alkyl group or a hydrogen; the molar ratio between the alkanoic acid(s) or ester(s) and the &#x3b1;,&#x3c9;-amino-alkanoic acid(s) or ester(s) is in the range from 0.001 to 0.4%. The present invention also relates to novel methods for obtaining such a composition.

Composition made of amino acid or ester with polymer quality and methods for obtaining same

A composition for a thermoplastic composite material having a thermoplastic matrix made of a semi-crystalline polyamide having a specific composition that includes at least two amide units, A, 55-95 mol %, and B, 5-45 mol %. A corresponds to x.T, wherein x is a C-Clinear aliphatic diamine and B corresponds to x'.T, wherein x&#x2032; can be B1): a specific branched x-dependent aliphatic diamine, B2): MXD or B3): a linear x-dependent aliphatic diamine, said polyamide having a glass transition temperature Tg of at least 90&#xb0; C. and a melting point no higher than 280&#xb0; C. Also, a method for manufacturing the composite material, the semi-crystalline polyamide polymer, the use of the composition and of the polymer for parts made of composite material, as well as the material and the resulting composite part.

Thermoplastic composite material made of a semi-crystalline polyamide and method for manufacturing same

The invention relates to a method for manufacturing a thermoplastic material, in particular a mechanical part made from said material, characterized in that it includes at least one step of injection molding a polyamide composition for a thermoplastic material or a composition of a thermoplastic material, or a step implemented by extrusion of same, said material including a thermoplastic matrix made from at least one thermoplastic polymer.

Method for manufacturing a thermoplastic material made from semi-crystalline polyamide

A process for a composite material, including an assembly of one or more reinforcing fibers, impregnated with at least one thermoplastic polymer with a glass transition temperature Tg of less than or equal to 75&#xb0; C. and a melting point of from 150&#xb0; C. to less than 250&#xb0; C. or a Tg of greater than 75&#xb0; C., the process including: i) a step of impregnating said assembly in bulk melt form with at least one thermoplastic polymer, which is the product of polymerization by polyaddition reaction of a reactive precursor composition including: a) at least one prepolymer P(X)n of said thermoplastic polymer, and b) at least one chain extender, represented by Y-A-Y, ii) a step of cooling and obtaining a fibrous preimpregnate, and iii) a step of processing and final forming of said composite material.

Method for a composite material impregnated with thermoplastic polymer, obtained from a prepolymer and a chain extender

A method for producing a composite material, including an assembly of one or a plurality of synthetic reinforcement fibers, impregnated with at least one thermoplastic polymer having a vitreous transition temperature Tg greater than or equal to 80&#xb0; C. including: i) a step of impregnating said assembly with a precursor composition in the molten state and including: a) at least one prepolymer P(X)n of said thermoplastic polymer, including a molecular chain P having, at the ends n thereof, identical reactive functions X, said prepolymer having a semiaromatic and/or semi-cycloaliphatic structure, b) at least one chain extender including two identical functions Y, which are reactive with at least one of said functions X; ii) a step of polymerization by mass (poly)addition, in the molten state, of said prepolymer with said chain extender, with said thermoplastic polymer of the thermoplastic matrix being the result of said polymerization by mass polyaddition.

Thermoplastic composite material reinforced with synthetic fibers and manufacturing process

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Caorches Saint Nicolas, France

Thierry Briffaud