Abstract: A process for the manufacture of ?-aminoalkanoic acid of formula NH2—(CH2)n—COOH, in which n is an integer from 9 to 11, by reaction of the corresponding ?-bromoalkanoic acid with ammonia, including the following stages: i) reaction of the ?-bromoalkanoic acid with an aqueous excess ammonia solution, and ii) separation of the ?-aminoalkanoic acid formed from the reaction mixture. The aqueous ammonia solution exhibits a concentration of 35% to 70% by weight, and stage i) is carried out under a pressure greater than atmospheric pressure, from 0.11 to 2.0 MPa absolute.

Abstract: A process for synthesizing a product of formula Br—(CH2)n—R by hydrobromination, by reacting: a reagent of formula (I) R1-CH?CH—R2 in which R1 and R2, identical or different, are chosen from H or an alkyl radical comprising 1 to 30 carbon atoms, which is saturated or unsaturated, linear or branched, functionalized or non-functionalized, with a molar excess of HBr relative to the reagent of formula (I), in the presence of a radical initiator, and optionally in the presence of at least one solvent, said process including a step A of mixing at least reagent I and the HBr, each of the latter arriving in the form of a flow of liquid into a mixing device dA.

Abstract: A process for synthesizing a product of formula Br—(CH2)n—R by hydrobromination, by reacting: a reagent of formula (I) R1-CH?CH—R2 in which R1 and R2, identical or different, are chosen from H or an alkyl radical comprising 1 to 30 carbon atoms, which is saturated or unsaturated, linear or branched, functionalized or non-functionalized, with a molar excess of HBr relative to the reagent of formula (I), in the presence of a radical initiator, and optionally in the presence of at least one solvent, said process including a step A of mixing at least reagent I and the HBr, each of the latter arriving in the form of a flow of liquid into a mixing device dA.

Abstract: A polyolefin graft polyamide composition incorporating lamellar nanofillers. Also, a tube, pipe or analogous formed from a multilayer at least one of the layers of which contains this composition. A thermoplastic composition having a polyolefin backbone containing a residue of at least one unsaturated monomer and a plurality of polyamide grafts, and also another component, wherein: the polyamide grafts are attached to the polyolefin backbone by the residue of the unsaturated monomer comprising a function capable of reacting via a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, the residue of the unsaturated monomer is attached to the backbone by grafting or copolymerization, wherein the other component consists of platy nanofillers, said nanofillers being phyllosilicates and representing from 1% to 6.5% by weight of the composition.

Abstract: A polyolefin graft polyamide composition incorporating lamellar nanofillers. Also, a tube, pipe or analogous formed from a multilayer at least one of the layers of which contains this composition. A thermoplastic composition having a polyolefin backbone containing a residue of at least one unsaturated monomer and a plurality of polyamide grafts, and also another component, wherein: the polyamide grafts are attached to the polyolefin backbone by the residue of the unsaturated monomer comprising a function capable of reacting via a condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group, the residue of the unsaturated monomer is attached to the backbone by grafting or copolymerization, wherein the other component consists of platy nanofillers, said nanofillers being phyllosilicates and representing from 1% to 6.5% by weight of the composition.

Abstract: The invention relates to a process for the ammonolysis of 11-aminoundecanoic acid, carried out under conditions that make it possible to limit secondary reactions that produce impurities, especially secondary amine type reactions, while considerably reducing the reaction time. According to the invention, the process comprises the following steps: i) a step of dispersing 11-bromoundecanoic acid, molten or non-molten, in an aqueous solution of ammonia, and ii) an ammonolysis step comprising the reaction of 11-bromoundecanoic acid with excess ammonia water under conditions whereby the reaction medium is stirred and heated gradually so as to obtain 11-aminoundecanoc acid with total consumption of the 11-bromoundecanoic acid.

Abstract: The invention relates to a process for the ammonolysis of 11-aminoundecanoic acid, carried out under conditions that make it possible to limit secondary reactions that produce impurities, especially secondary amine type reactions, while considerably reducing the reaction time. According to the invention, the process comprises the following steps: i) a step of dispersing 11-bromoundecanoic acid, molten or non-molten, in an aqueous solution of ammonia, and ii) an ammonolysis step comprising the reaction of 11-bromoundecanoic acid with excess ammonia water under conditions whereby the reaction medium is stirred and heated gradually so as to obtain 11-aminoundecanoc acid with total consumption of the 11-bromoundecanoic acid.

Abstract: The invention relates to thermoplastic polymer compositions in the form of masterbatches, comprising a matrix of an olefinic copolymer obtained from olefinic monomers and at least one alkyl(meth)acrylate monomer, in which exfoliable organophilic fillers of the lamellar type are dispersed, such as silicates, characterized in that after complete dispersion, the fillers are of nanometer scale with a content of at least 20% by weight with relation to the composition. The invention is further of application for the production of polymeric materials particularly of the polyethylene type, with fillers, the thermomechanical and barrier properties of which are improved.

Abstract: The present invention concerns a process for preparing a polymer nanocomposite composition, the process comprising: a) mixing a melted polyamide of inherent viscosity under 1 and a nanofiller to disperse the nanofiller in said polyamide; and b) subjecting the previous mixture to polymerization conditions to polymerize the polyamide and to form the polymer nanocomposite composition. Advantageously the inherent viscosity of the polyamide is under 0.9 and preferably between 0.4 and 0.8. Step a) is carried out in an extruder or a mixer. Advantageously a mono or twin-screw extruder is used. Step b) could be made either in melted state or in solid state. It is easier to make it in the same apparatus as step a). Should step a) is carried out in an extruder, step b) is made in the same extruder. Polymerization of step b) can be carried with a catalyst and/or by having the extruder zones in which step b) takes place to operate under vacuum.

Abstract: The invention relates to thermoplastic polymer compositions in the form of masterbatches, comprising a matrix of an olefinic copolymer obtained from olefinic monomers and at least one alkyl(meth)acrylate monomer, in which exfoliable organophilefilelrs of the lamellar type are dispersed, such as silicates, characterized in that after complete dispersion, the fillers are of nanometer scale with a content of at least 20% by weight with relation to the composition. The invention is further of application for the production of polymeric materials particularly of the polyethylene type, with fillers, the thermomechanical and barrier properties of which are improved.

Abstract: A composition comprising by weight: 70 to 96% of at least one polyamide chosen from PA-11, PA-12, aliphatic polyamides resulting from the condensation of an aliphatic diamine having from 6 to 12 carbon atoms and an aliphatic diacid having from 9 to 12 carbon atoms, and 11/12 copolyamides having either more than 90% of nylon-11 units or more than 90% of nylon-12 units; 4 to 10% of a plasticizer; 0 to 25% of an NBR or H-NBR elastomer; and the sum of the amount of plasticizer and the amount of elastomer is between 4 and 30%; can be manufactured by melt-blending the various constituents using standard techniques for thermoplastics. The composition is particularly useful for pipes used in the operation of offshore oil and gas fields. They exhibit very good ageing resistance. They are also useful for simpler pipes in motor vehicles, these compositions withstanding the ageing caused by the temperature under the bonnet of motor vehicles and the nature of the fluids transported.

Abstract: A composition comprising by weight: 70 to 96% of at least one polyamide chosen from PA-11, PA-12, aliphatic polyamides resulting from the condensation of an aliphatic diamine having from 6 to 12 carbon atoms and an aliphatic diacid having from 9 to 12 carbon atoms, and 11/12 copolyamides having either more than 90% of nylon-11 units or more than 90% of nylon-12 units; 4 to 10% of a plasticizer; 0 to 25% of an NBR or H-NBR elastomer; and the sum of the amount of plasticizer and the amount of elastomer is between 4 and 30%; can be manufactured by melt-blending the various constituents using standard techniques for thermoplastics. The composition is particularly useful for pipes used in the operation of offshore oil and gas fields. They exhibit very good ageing resistance. They are also useful for simpler pipes in motor vehicles, these compositions withstanding the ageing caused by the temperature under the bonnet of motor vehicles and the nature of the fluids transported.

Abstract: A composition comprising by weight: 70 to 96% of at least one polyamide chosen from PA-11, PA- 12, aliphatic polyamides resulting from the condensation of an aliphatic diamine having from 6 to 12 carbon atoms and an aliphatic diacid having from 9 to 12 carbon atoms, and 11/12 copolyamides having either more than 90% of nylon-11 units or more than 90% of nylon-12 units; 4 to 10% of a plasticizer; 0 to 25% of an NBR or H-NBR elastomer; and the sum of the amount of plasticizer and the amount of elastomer is between 4 and 30%; can be manufactured by melt-blending the various constituents using standard techniques for thermoplastics. The composition is particularly useful for pipes used in the operation of offshore oil and gas fields. They exhibit very good ageing resistance. They are also useful for simpler pipes in motor vehicles, these compositions withstanding the ageing caused by the temperature under the bonnet of motor vehicles and the nature of the fluids transported.

Abstract: The present invention is a composition comprising by weight: