Arkema France

Centre National De La Recherche Scientifique

Arkema Inc.

Espci

Ecole Superieure De Physique Et De Chimie Industrielles De La Ville De Paris

Centre National De La Recherche Scientifique-cnrs

Mathieu Capelot

Gilles Hochstetter

Thierry Briffaud

Ludwik Leibler

Patrice Gaillard

Arthur Pierre Babeau

Denis Huze

Nicolas Dufaure

Florence Mehlmann

Quentin P Pineau

Thibaut Savart

François Tanguy

Damien Montarnal

François-Genes Tournilhac

Samuel Devisme

Yves Deyrail

Francois Tournilhac

François Tournilhac

Lise Deves

Takehiro Fukuyama

Antoni Nogues

Lluis Casadevall

Gregory S O'brien

Adam W Hauser

Réda Agnaou

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

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 a resin composition comprising a blend of: a) 10 to 90% by weight of at least one fluoropolymer resin and b) 90 to 10% by weight of at least one semi-crystalline polyester resin, based on the total weight of the fluoropolymer resin and semi-crystalline polymer resin. The invention also relates to a method for producing such resin composition, to a powder coating composition comprising such resin composition and to the use of such resin composition, in particular for architectural powder coating.

Resin composition for powder coatings

Disclosed is a thermoplastic elastomer composition comprising a blend of at least two fluoropolymers. The first fluoropolymer has from 0 to 30 weight percent of a monomer J selected from the group consisting of hexafluoropropene (HFP), fluorinated or perfluorinated vinyl ethers, 2,3,3,3-tetrafluoropropene, trifluoropropene, 1-chloro-3,3,3-trifluoro propene or combinations thereof. The second fluoropolymer has at least 30 weight percent, preferably at least 35 weight percent, of monomer T selected from the group consisting of hexafluoropropene (HFP), fluorinated or perfluorinated vinyl ethers, 2,3,3,3-tetrafluoropropene, trifluoropropene, 1-chloro-3,3,3-trifluoro propene or combinations thereof.

Fluoro-thermoplastic elastomer blends

The invention relates to a process for manufacturing a pre-impregnated fibrous material comprising a continuous fibre fibrous material and at least one thermoplastic polymer matrix, characterized in that said pre-impregnated fibrous material is made of a single unidirectional ribbon or a plurality of parallel ribbons unidirectional and in that said method comprises an impregnation step, in particular at the core, of said fibrous material being in the form of a roving or of several parallel rovings by said thermoplastic polymer being in powder form, said step of impregnation being carried out with said at least one thermoplastic polymer and said fibrous material the D90/D10 ratio of which by volume of the thermoplastic polymer particles ranges from 1.5 to 50, in particular from 2 to 10 and the ratio of the average diameter by volume (D50) thermoplastic polymer particles on the average diameter of the unit fibres of said fibrous material ranges from 3 to 40, except for an impregnation process in aqueous suspension of a fibrous material made of carbon fibres by a thermoplastic polymer, said D50/mean unit fibre diameter ratio being comprised from 3 to 8, and excluding any electrostatic process in voluntary charge.

Process for manufacturing a fibrous material pre-impregnated with thermoplastic polymer in powder form

A method of manufacturing an impregnated fibrous material including a fibrous material made of continuous fibers and at least one thermoplastic polymer matrix, the method including pre-impregnating the fibrous material while it is in the form of a roving or several parallel rovings with the thermoplastic material and heating the thermoplastic matrix for melting, or maintaining in the molten state, the thermoplastic polymer after pre-impregnation, the at least one heating step being carried out by means of at least one heat-conducting spreading part (E) and at least one heating system, with the exception of a heated calendar, the roving or the rovings being in contact with part or all of the surface of the at least one spreading part (E) and partially or wholly passing over the surface of the at least one spreading part (E) at the level of the heating system.

Method for manufacturing a fibrous material impregnated with thermoplastic polymer

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.

The invention relates to a process for manufacturing a preimpregnated fibrous material containing a fibrous material made of continuous fibers and at least one thermoplastic polymer matrix, wherein the preimpregnated fibrous material is produced as a single unidirectional tape or of a plurality of parallel unidirectional tapes and wherein the process includes a step of impregnating, in particular fully and homogeneously, the fibrous material that is in the form of a roving or of several parallel rovings with the at least one thermoplastic polymer matrix that is in powder form, the impregnating step being carried out by a dry route in a tank and the control of the amount of the at least one thermoplastic polymer matrix in said fibrous material being achieved by control of the residence time of said fibrous material in the powder, with the exclusion of any electrostatic process with intentional charging.

Fluidized-bed process for manufacturing a fibrous material preimpregnated with thermoplastic polymer

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

A process and reactive prepolymer composition for producing a part made of a thermoplastic composite material by molding in a closed mold, where the material includes reinforcing fibers and a polyamide thermoplastic matrix impregnating the fibers having the steps of preparing the reactive prepolymer precursor, injecting the reactive prepolymer precursor in the molten state into the closed mold containing the fibers, thereby impregnating the fibers with the reactive precursor mixture, bulk polymerizing the reactive prepolymer precursor in situ, and demolding the molded part produced.

Method for producing a fibre-reinforced polyamide matrix composite material from a reactive prepolymer precursor composition

The invention relates to a composition for thermoplastic composite material comprising:

Semi-crystalline polyamide composition with high glass transition temperature for composite material, process for manufacturing same and uses thereof

Method for open-mold production of a semi-crystalline thermoplastic polyamide matrix fiber-reinforced composite. The matrix has Tg&#x3e;80&#xb0; C. and Tf between 280&#xb0; C. and 200&#xb0; C. The matrix is prepared in-situ by molten state bulk polycondensation of a reactive precursor composition including A: a first polyamide prepolymer A1 each carrying two identical functions and a second polyamide prepolymer A2 each carrying two identical functions different from and coreactive with those of A1. The reactive precursors may alternatively include B: a prepolymer carrying (on the same chain) two different functions coreactive with each other. The reactive precursors may alternatively include a precursor composition that is a mixture of (A+B). The method involves successive steps of i) preparing the reactive mixture, ii) continuously coating the fibers by deposition-impregnation with the reactive mixture, iii) in-situ bulk polycondensation in an open heated die, and iv) cooling the composite.

Method for the open-mold production of a fiber-reinforced semi-crystalline polyamide matrix composite material from a prepolymer reactive precursor composition

An impregnated fibrous material comprising a fibrous material made of continuous fiber and at least one thermoplastic polymer matrix, wherein the at least one thermoplastic polymer is an non-reactive amorphous polymer, the glass transition temperature of which is such that Tg&#x2265;80&#xb0; C., or a non-reactive semi-crystalline polymer, the melting temperature of which is Tf&#x2265;150&#xb0; C., the fiber volume ratio is constant in at least 70% of the volume of the tape or ribbon, the fiber ratio in the pre-impregnated fibrous material ranging from 45 to 65% by volume, the porosity rate in the pre-impregnated fibrous material being less than 10%.

Growing community of inventors

Bernay, France

Mathieu Capelot