Abstract: 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.

Abstract: 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° C. and a melting point of from 150° C. to less than 250° C. or a Tg of greater than 75° 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.

Abstract: 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° C.<Tf?300° C. as determined according to the ISO norm 1 1357-3 (2013).

Abstract: 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° C.<Tf?300° C. as determined according to standard ISO 1 1357-3 (2013).

Abstract: The present invention relates to a composition which comprises at least one ?,?-amino-alkanoic acid or ester and at least one alkanoic ester or acid, characterised in that: the ?,?-amino-alkanoic acid or ester has formula H2N-(CH2)n—COOR, wherein n=9 to 13 and R is an alkyl group or a hydrogen; the alkanoic ester or acid has formula R1-COOR2, wherein R1 is a straight or branched alkyl group with formula CmH2m+1 or CmH2m?3, wherein m=6 to 20 and R2 is an alkyl group or a hydrogen; the molar ratio between the alkanoic acid(s) or ester(s) and the ?,?-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.

Abstract: 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° 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.

Abstract: 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 C9-C18 linear aliphatic diamine and B corresponds to x?.T, wherein x? 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° C. and a melting point no higher than 280° 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.

Abstract: An industrial method for preparing a semi-aromatic copolyamide having a general formula A/10.T, wherein: A denotes a unit obtained by polycondensing a lactam or a C9-C12 amino acid; and 10.T denotes a unit obtained by polycondensing 1.10-decanediamine and terephtalic acid. The method includes a step for polycondensing the comonomers, the amino acid or the lactam, 1.10-decanediamine and terephtalic acid in the presence of at least one C1-C7 linear aliphatic acid. The level of foaming in a reactor is substantially reduced, during the polycondensation step, in relation to the level observed without C1-C7 linear aliphatic acid.

Abstract: 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 C9-C18 linear aliphatic diamine and B corresponds to x?.T, wherein x? 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° C. and a melting point no higher than 280° C. Also, a method for manufacturing said 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.

Abstract: The invention relates to a copolyamide comprising at least two units corresponding to the following general formula: A/10,T in which: A is chosen from a unit obtained from an amino acid, a unit obtained from a lactam and a unit corresponding to the formula (Ca diamine).(Cb (cyclo)aliphatic diacid), with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36; 10,T denotes a unit obtained from the polycondensation of 1,10-decanediamine and terephthalic acid, characterized in that it has a polydispersity index, denoted by Ip, of less than or equal to 3.5, measured by gel permeation chromatography. The invention also relates to the process for preparing said copolyamide, a composition comprising this polyamide and also the use of this polyamide and of such a composition.

Abstract: The invention relates to a method for manufacturing a thermoplastic material, in particular a mechanical part made from said material, characterised in that it includes at least one step of injection moulding 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.

Abstract: A molding composition including at least one semi-crystalline polyamide derived from the polyaddition of a) at least one polyamide prepolymer bearing n identical functions X chosen from carboxyl, amine and hydroxyl, and of b) at least one non-polymeric reactive extender bearing two identical functions Y that are reactive with said functions X with n ranging from 1 to 3, the polyamide and prepolymer a) including 55 mol % to 95 mol % of amide units A, 5 mol %-45 mol % of amide units B with A corresponding to x.T in which x is a linear aliphatic C9-C18 diamine and B corresponding to x?.T in which x? may be B1): specific branched aliphatic diamine dependent on x or B2): MXD or B3): linear aliphatic diamine which depends on x, the polyamide having a Tg of at least 90° C. and a Tm of less than or equal to 280° C.

Abstract: 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° C. and a melting point of from 150° C. to less than 250° C. or a Tg of greater than 75° 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.

Abstract: A reactive molding composition including a precursor reactive composition of a semi-crystalline thermoplastic polymer which is a semi-crystalline polyamide and optionally at least one fibrous reinforcement and with said precursor composition including a) at least one polyamide prepolymer bearing n identical functions X chosen from carboxyl and amine and b) at least one non-polymeric extender bearing two epoxy functions Y that are reactive with said functions X with n ranging from 1 to 3, said polymer and prepolymer a) being of specific composition comprising 55 mol % to 95 mol % of at least two amide units A, and 5 mol % to 45 mol % of amide units B with A corresponding to x.T in which x is a linear aliphatic C9-C18 diamine and B corresponding to x?.T, said polyamide having a Tg of at least 80° C. and a Tm of less than or equal to 280° C.

Abstract: A composition including at least one polyamide polymer obtained from at least one reactive polyamide prepolymer including at least one chain extender (PA1-All1-PA1), the polyamide polymer being prepared at a temperature T1 no lower than the temperature melting temperature or glass transition temperature of the polymer and having a mean molecular weight Mn1. 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 T2 and T3, T2 and T3 being higher than T1, and the melt viscosity ?2 or ??3 observed at the temperature T2 or T3, respectively, being lower than the melt viscosity ?2 or ?3 of the polyamide polymer, which does not include a chain extender and has the same mean molecular weight Mn1(PA1) observed at the same temperature T2 or T3. The composition includes one or more polyamides.

Abstract: A composition for a thermoplastic composite material, wherein said matrix thermoplastic polymer is a semi-crystalline polyamide polymer including amide units Z, 10T and 6T; wherein Z corresponds to an amide unit resulting from the condensation of at least one lactam or at least one C6-C14 amino acid, from the condensation of a diamine and a diacid X.Y, X and Y being at C4-C18, the molar rate of Z being 0.0%<Z?30.0%; 10T is a majority amide unit resulting from the condensation of a C10 diamine and terephthalic acid, provided in a molar rate of 40.0% to 95.0%; and 6T is an amide unit resulting from the condensation of a C6 diamine and terephthalic acid, provided in a molar rate of 5.0% to 60.0%.

Abstract: The invention concerns a method for producing polyamide from an amino ester of formula NH2—(CH2)n—COOR, in which R represents an alkyl group and n represents an integer ranging from 5 to 14, comprising: a first reaction step in the presence of water, at a first temperature; followed by a second reaction step at a second temperature higher than the first temperature.

Abstract: The invention relates to a copolyamide comprising at least two different units corresponding to the following general formulation: A/X.T A is chosen from a unit obtained from an amino acid, a unit obtained from a lactam and a unit corresponding to the formula (Ca diamine).(Cb diacid), with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36, advantageously between 9 and 18, X.

Abstract: The invention relates to a composition comprising from 10% to 36% by weight of at least one polyolefin, from 0.05% to 0.30% by weight of at least one copper heat stabilizer, wherein the copper heat stabilizer is a mixture of potassium iodide and copper iodide, and at least one predominant semi-aromatic copolyamide comprising at least two distinct units corresponding to the following general formula: A/X.T in which: A is chosen from at least one unit obtained from an amino acid, at least one unit obtained from a lactam and at least one unit corresponding to the formula (Ca diamine).(Cb diacid), and the mixtures thereof, X.T denotes a unit obtained from the polycondensation of a Cx diamine denoted X and of terephthalic acid denoted T, the weight percentages being given relative to the total weight of the composition.

Abstract: 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 C9-C18 linear aliphatic diamine and B corresponds to x?.T, wherein x? 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° C. and a melting point no higher than 280° C. Also, a method for manufacturing said 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.