Abstract: The present invention relates to a process for preparing at least one mercaptan, comprising the following steps: i) treatment of a catalyst for the sulfhydrolysis of at least one dialkyl sulfide, preferably a zeolite, said treatment comprising the following steps: 1) heating said catalyst, preferably in the presence of an inert gas; and 2) placing said catalyst in contact with hydrogen sulfide (H2S); and then ii) a sulfhydrolysis reaction in which at least one dialkyl sulfide is reacted with H2S in the presence of said catalyst treated according to step i), to obtain at least one mercaptan; said catalyst being a zeolite.

Abstract: The present invention relates to a polymer powder for the manufacture of articles by 3D printing, particularly by sintering, comprising a thermoplastic polymer and a particular antioxidant having improved stability and recyclability. The invention also relates to a process for preparing this powder and to the use thereof in a process for manufacturing by sintering, and to the articles manufactured from said powder.

Abstract: Multilayer structure intended for the transportation, for the distribution and for the storage of hydrogen, including, from the inside toward the outside, at least one leaktightness layer (1) and at least one composite reinforcing layer (2), said innermost composite reinforcing layer being wound around said outermost adjacent leaktightness layer (1), said leaktightness layers having a composition predominantly including: at least one aliphatic polyamide thermoplastic polymer P1i, i=1 to n, n being the number of semicrystalline leaktightness layers, the Tm of which, as measured according to ISO 11357-3: 2013, is greater than 200° C., with the exclusion of a polyether block amide (PEBA), said polyamide thermoplastic polymer being a polyamide exhibiting a mean number of carbon atoms per nitrogen atom of from 7 to 9, up to 30% by weight of impact modifier, up to 1.5% by weight of plasticizer, said composition being devoid of nucleating agent.

Abstract: A multilayer structure for transporting, distributing and storing hydrogen including, from the inside to the outside, a sealing layer and at least one composite reinforcement layer, the sealing layer including from the inside to the outside: a layer of a composition including: a short-chain polyamide thermoplastic polymer, more than 15% and up to 50% by weight of impact modifier, or including: a semi-crystalline long-chain polyamide thermoplastic polymer, up to 50% by weight of impact modifier, up to 3% by weight of plasticizer; a hydrogen barrier layer; a layer of a composition including: a short-chain polyamide thermoplastic polymer, more than 15% and up to 50% by weight of impact modifier, or including: a semi-crystalline long-chain polyamide thermoplastic polymer, up to 50% by weight of impact modifier, up to 3% of weight of plasticizer, the innermost composite reinforcement layer being wound around the sealing layer.

Abstract: A transparent antistatic composition based on polymethyl methacrylate (PMMA), including: 55% to 99.9% by weight of PMMA, and 0.1% to 45% by weight of at least one polyamide (PA) block-containing and polyether (PE) block-containing copolymer (PEBA) including polyethylene glycol (PEG), with respect to the total composition weight, said copolymer being characterized in that it includes in the range 50% to 80% by weight of PEG with respect to the total weight of copolymer.

Abstract: The present invention relates to new zeolitic adsorbent materials which are particularly specific and adapted for the non-cryogenic separation of gases, and more particularly for the separation of nitrogen by adsorption in gas streams such as air, and also for the purification of hydrogen by adsorption of carbon monoxide (CO) and/or nitrogen (N2), and also to the use thereof especially for the preparation of medical oxygen in oxygen concentrators for respiratory assistance.

Abstract: The present invention relates to the field of water-soluble or water-dispersible copolymers comprising at least one random copolymer comprising styrene, methacrylic acid, acrylic acid and butyl acrylate.

Abstract: The present invention relates to a process for preparing at least one mercaptan, comprising the following steps: A) H2S and at least one alcohol are introduced into a first reactor; B) the H2S and said at least one alcohol are reacted to obtain an outlet stream comprising at least one mercaptan, at least one dialkyl sulfide and at least one dialkyl disulfide (DADS) and possibly unreacted H2S; C) said outlet stream obtained from step B) is separated into: a stream F1 comprising the mercaptan(s), a stream F2 comprising the dialkyl sulfide(s) and the DADS(s), and optionally a stream F3 comprising H2S; D) a purification step is performed on stream F2 in order to separate: a stream F2? comprising the dialkyl sulfide(s); and the DADS(s); E) stream F2? is introduced with H2S into a second reactor; F) a sulfhydrolysis reaction of the dialkyl sulfide(s) with H2S is performed to obtain an outlet stream F4 comprising said mercaptan(s), and possibly unreacted H2S; G) optionally, stream F4 obtained from step F) i

Abstract: 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.

Abstract: A pigmented pulverulent composition based on polyamide for coating substrates, including: (a) 40% to 99% by weight of at least one polyamide, (b) 1% to 30% by weight of at least one pigment, and (c) 0% to 30% by weight of at least one additive, wherein the polyamide has an inherent viscosity, as measured using an Ubbelohde tube at 20° C. on a 0.5% by weight solution in m-cresol according to standard ISO 307 but with a measuring temperature of 20° C. rather than 25° C., of more than 0.7 (g/100 g)?1, and wherein the composition has a volume-median diameter Dv50, as measured according to standard ISO 9276—parts 1 to 6, of 10 to 200 ?m. A process for manufacturing the composition, the use thereof for coating a—metallic—substrate, and an object comprising a metallic substrate coated with a coating obtained with the pigmented pulverulent composition based on polyamide.

Abstract: A one-pack polymer modifier containing a) at least one process aid functionalized with a reactive epoxy, hydroxyl, ?-keto ester, ?-keto amide or carboxylic acid functional group, b) at least one impact modifier, c) optionally, at least one mineral filler and d) optionally, at least one further additive is useful for modifying the properties of thermoplastic polymers such as PVC, including reducing the surface gloss of an article prepared from the thermoplastic polymer and improving the impact strength of such an article.

Abstract: A composition including: (a) 30% to 99.8% by weight by weight of recycled material from a used single-layer and/or multilayer tube and/or tank having initially transported or contained motor vehicle fluids, the tube and/or the tank having a composition which predominantly includes at least one polyamide, the used tube and/or the used tank having been ground into granules and the fluid residues present in the tube and/or tank having been totally or partially extracted, (b) up to 70% of a semicrystalline aliphatic polyamide, (c) up to 0.2% of an additive, the polyamide of the used tube and/or the used tank having functions resulting from oxidation reactions chosen from the primary amide functions, nitriles, terminal methyl groups, alkenes, formamides, imides, carboxylic acids and alcohols and mixtures thereof, in a mole ratio greater than that of the same polyamide constituting a non-used tube and/or tank which has not yet transported or contained motor vehicle fluids.

Abstract: Disclosed herein is a heat transfer composition containing 1,1,2-trifluoroethylene and carbon dioxide, and possibly additional compounds, as well as heat transfer compositions containing the heat transfer fluid and methods of using the heat transfer fluid to reduce environmental impacts of heat transfer apparatuses. Heat apparatus configured to contain the heat transfer fluid are also disclosed.

Abstract: A composition including at least one thermoplastic polyurethane and at least one copolymer containing polyamide blocks and polyether blocks comprising amine chain ends, the composition having a tensile modulus at 23° ° C. of less than or equal to 170 MPa. Also, a composition obtained by the reaction of at least one copolymer containing polyamide blocks and polyether blocks comprising amine chain ends and of at least one thermoplastic polyurethane or of thermoplastic polyurethane precursors, processes for preparing such compositions and articles made therefrom.

Abstract: The present invention relates to a molding composition comprising, by weight: a) 20% to 60% of at least one long-chain aliphatic polyamide having a number of carbon atoms per nitrogen atom of greater than or equal to 9, said at least one polyamide having an inherent viscosity in solution of less than or equal to 1.3, as determined in accordance with the standard ISO 307:2007 at a temperature of 20° C., b) 40% to 75% of glass fibers, and c) 0% to 5% by weight, by weight of at least one additive, the sum of the proportions of each constituent of said composition being equal to 100%, with the exclusion of an amorphous polyamide and a microcrystalline polyamide.

Abstract: The present invention relates to a composition for blow-molding or extrusion, in particular blow-molding, comprising by weight: a) from 88 to 99.95%, more particularly from 89 to 99.9%, in particular from 93 to 99.9%, of at least one semicrystalline aliphatic polyamide having a carbon number per nitrogen atom of greater than or equal to 7, more particularly greater than or equal to 8, b) from 0.05% to 10%, more particularly from 0.1% to 9%, in particular from 0.1% to 5% by weight of at least one branching agent chosen from polyepoxides, polyanhydrides, more particularly polymaleic anhydrides and polyepoxides, c) from 0 to 2% of at least one additive, more particularly from 0.1 to 2%, the composition having, after compounding, a melt viscosity of from 10 000 to 300 000 Pa·s, preferably from 15 000 to 220 000 Pa·s, as measured in plane-plane geometry according to standard 6721-10:2015 at a temperature of 250° C., a frequency of 0.

Abstract: The present invention relates to a molding composition comprising, by weight: a) 20% to 60%, especially from 20% to 50%, in particular 25% to 39.9%, of at least one long-chain aliphatic polyamide having a number of carbon atoms per nitrogen atom of greater than or equal to 9, in particular greater than or equal to 10, said at least one polyamide having an inherent viscosity in solution of less than or equal to 1.3, in particular less than or equal to 1.25, as determined in accordance with the standard ISO 307:2007 at a temperature of 20° C., b) 40% to 75% of glass fibers, especially from 50% to 75%, in particular from 60% to 70%, of glass fibers, and c) 0% to 5% by weight, preferably 0.1% to 5% by weight, of at least one additive, the sum of the proportions of each constituent of said composition being equal to 100%.

Abstract: The invention relates to a method for controlling the temperature of a battery in an electric or hybrid motor vehicle by means of a system comprising a vapor compression circuit in which flows a first heat transfer composition comprising 2,3,3,3-tetrafluoropropene, and a secondary circuit in which flows a second heat transfer composition comprising 1-chloro-3,3,3-trifluoropropene that has a ratio of the Z form to the E form of less than or equal to 9, the method involving: —heat exchange between the battery and the second heat transfer composition; —heat exchange between the second heat transfer composition and the first heat transfer composition. The invention also relates to a system for carrying out said method.

Abstract: A composition including at least one thermoplastic polyurethane and at least one polyamide comprising amine chain ends, wherein the polyamide is the reaction product of one or more monomers chosen from amino acids or aminocarboxylic acids, lactams and monomers resulting from the reaction between an aliphatic diamine and a dicarboxylic acid. Also, a composition obtained by the reaction of at least one thermoplastic polyurethane or thermoplastic polyurethane precursors and of at least one polyamide comprising amine chain ends, processes for preparing such compositions and articles made therefrom.

Abstract: A composition including, relative to the total weight of the composition, from 40% to 95% by weight of at least one copolymer containing polyamide blocks and polyether blocks and from 5% to 60%, by weight, of at least one thermoplastic polyurethane, the composition having a tensile modulus at 23° C. of less than or equal to 150 MPa. Also, a composition obtained by the reaction of at least one copolymer containing polyamide blocks and polyether blocks and of at least one thermoplastic polyurethane or of thermoplastic polyurethane precursors, processes for preparing such compositions and articles made therefrom.