Abstract: A polyamide-based polymer composition including: a) 50% to 98% by weight of a transparent amorphous polyamide; b) 1% to 15% by weight of a polymer in the form of core-shell particles; and c) 1% to 15% by weight of a polyether block and polyamide block copolymer, wherein the polyether block and polyamide block copolymer has: as a 2 mm layer, a transmittance at 560 nm of 90% or more; and a refractive index that does not differ by more than 0.01 from that of the transparent amorphous polyamide and wherein the polymer in the form of core-shell particles has a refractive index that does not differ by more than 0.01 from that of the transparent amorphous polyamide. Also, a process for the manufacture of the composition, and the composition capable of being obtained by said process.

Abstract: The present invention relates to a process for the continuous synthesis of heavy alkyl acrylates by a transesterification reaction using hydrozincite as a heterogeneous catalyst.

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 and polyisocyanates, more particularly polymaleic anhydrides and polyepoxides, c) from 0 to 2% of at least one additive, more particularly 10 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 ISO standard 6721-10:2015 at a temperature of 250° C., a frequency of 0.

Abstract: The use of a refrigerant including 2,3,3,3-tetrafluoropropene for the heating of a battery of an electric vehicle including at least one electrochemical cell including a negative electrode, a positive electrode and an electrolyte, the electrolyte including a lithium salt and the negative electrode including metallic lithium as electrochemically active material.

Abstract: A mixture including: 99% to 99.9999% by weight of at least one lithium salt A; and 1 ppm to 10,000 ppm by weight of at least one potassium salt B. Also, a battery including at least one electrochemical cell, the electrochemical cell including a negative electrode, a positive electrode and the mixture.

Abstract: Embodiments relate to a (meth)acrylic composition and also to a composite material obtained by polymerization of such a (meth)acrylic composition. Embodiments may relate to a (meth)acrylic composition comprising also a block copolymer, preferably a (meth)acrylic block copolymer and also to a composite material obtained by polymerization of such a (meth)acrylic composition comprising a block copolymer, preferably a (meth)acrylic block copolymer. Embodiments may relate to a (meth)acrylic composition comprising also a (meth)acrylic block copolymer and a mineral filler as well to a composite material obtained by polymerization of such a (meth)acrylic composition comprising a (meth)acrylic block copolymer and a mineral filler.

Abstract: A method for welding at least two parts including a thermoplastic material and having respective surfaces to be welded, including: inserting an insert between the surfaces to be welded of the two parts; generating heat via the insert; wherein the insert moves in relation to the parts to be welded in a welding direction. Also, an installation adapted for implementation of the method.

Abstract: A process for conditioning air, by means of a main circuit, the main circuit being a vapor compression circuit, wherein a first refrigerant circulates, and a secondary circuit with no compressor, wherein a non-flammable second refrigerant including a hydrofluoroolefin and/or a hydrochlorofluoroolefin circulates, the main circuit and the secondary circuit being coupled to one another; the process including a heat exchange between the surroundings and the first refrigerant, a heat exchange between the first and second refrigerants, and a heat exchange between the second refrigerant and the air to be conditioned. Also, an air conditioning plant for implementing the process.

Abstract: The present invention relates to a rheology additive, according to which A) said additive consists of: a) at least one symmetrical fatty diamide of formula (I): (AGH)-CONH-(PMDA)-NHCO-(AGH) (I) with: (AGH): hydroxylated fatty acid residue R1CO2H, without —CO2H group, with R1 of C18 to C20 comprising a hydroxyl group, —NHCO— or —CONH—: amide group, —(PMDA): residue without amine groups of 1,5-pentamethylenediamine; or alternatively according to which: B) said additive comprises: a) at least one symmetrical fatty diamide as defined above according to formula (I) and, in addition, b) at least one other symmetrical fatty diamide of formula (II): (AGH)-CONH-(R)-NHCO-(AGH) (II) with (AGH), —NHCO— and —CONH— having the same definition as that above in said formula (I), and (R) being the residue without amine groups of a diamine, other than (PMDA), chosen from a cycloaliphatic, aliphatic or aromatic diamine.

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 copolymer having amide structural elements and polyether structural elements and containing at least one structural element A, at least one structural element B and at least one structural element C, wherein: structural element A is an aliphatic amide repeat unit containing 10 or more carbon atoms, structural element B is an aliphatic amide repeat unit selected from a structural element obtained from at least one amino acid, a structural element obtained from at least one lactam, and a structural element X2.Y2, structural element B containing from 6 to 36 carbon atoms; structural element A being different from structural element B, structural element C is a repeat unit of the formula X3.Y3 obtained from the polycondensation of at least one polyethylene glycol diamine and/or at least one polypropylene glycol diamine designated X3 and having a molecular weight of between 200 and 1000 and a linear aliphatic dicarboxylic acid designated Y3.

Abstract: The invention relates to a method for producing a bent thermoplastic composite, comprising 35% or less in volume of a polymeric matrix including (meth)acrylic polymers, and at least 65% in volume of fiber, where the method includes (a) a step of providing the thermoplastic composite; (b) a step of heating a portion of the thermoplastic composite, said heating being selected between, conduction, radial and/or volumetric and the heating duration and/or the heating temperature being selected according to at least the thickness of the thermoplastic composite; (c) a step of creating a bent section in the heated portion by bending the heated portion; and (d) a step of cooling the bent section to solidify it and to form a bent thermoplastic composite, at a cooling temperature and/or a cooling duration selected in accordance with the glass transition temperatures (Tg) of the bent thermoplastic composite.

Abstract: A composition including: at least one (hydro)halogenated olefin having the chemical formula: CX1X2?CX3X4 (I) where X1 is selected from F and Cl, and where X2, X3 and X4 are independently selected from H, F and Cl; and, at least one aliphatic alkene, having a boiling point of less than or equal to 80° C. measured at 1013 hPa; wherein the (hydro)halogenated olefin is solely in gaseous form or in the form of a liquid-gas equilibrium.

Abstract: The invention relates to a process for the co-production of methyl mercaptan and of dimethyl disulfide, comprising the following successive steps: a) reaction of at least one carbon oxide in the presence of hydrogen sulfide (H2S) and hydrogen to form a stream (M) comprising methyl mercaptan, water, and possibly unreacted hydrogen sulfide, b) purification of the stream (M) to obtain a stream (N) enriched in methyl mercaptan and a stream containing the uncondensable compounds (Muncond), c) optional recycling of the stream of uncondensable compounds (Muncond) obtained from step b) into step a), d) recovery of a first portion of the stream (N) including methyl mercaptan purified in step b), e) oxidation with sulfur of the second portion of the stream (N) of methyl mercaptan, to form a stream (O) comprising dimethyl disulfide, hydrogen sulfide, and possibly unreacted methyl mercaptan, f) purification of the stream (O) to separate, on the one hand, the enriched dimethyl disulfide and, on the other hand, the hydr

Abstract: The invention relates to a method for purifying an alkyl hydroperoxide from dialkyl peroxide thereof, comprising a step of distillation in the presence of alcohol and water followed by extraction of the condensates using a hydrocarbon or a hydrocarbon blend.

Abstract: The present invention relates to a (meth)acrylic composition suitable for (meth)acrylic polymeric compositions and (meth)acrylic polymeric composites, its method of preparation, its use and obtained (meth)acrylic polymeric compositions and (meth)acrylic polymeric composites. In particular the present invention relates to a (meth)acrylic composition that is crosslinked once polymerized and that is suitable for (meth)acrylic composites and more particular for reinforcing elements or fibre reinforced polymer (FRP) rebars. More particularly the present invention relates to a (meth)acrylic composition suitable for producing reinforcing elements or FRP rebars, preparing such a (meth)acrylic composition, composite reinforcing elements or rebar comprising it after polymerization and method of preparing such a composite reinforcing elements or FRP rebar. The present invention also relates also to the use of such a (meth)acrylic composition and the use of reinforcing elements or FRP rebars for concrete.

Abstract: The invention relates to a composition comprising, relative to the total weight of the composition: from 20% to 90%, preferably from 40% to 70%, by weight of at least one thermoplastic elastomer (TPE), preferably an elastomeric thermoplastic copolymer, and from 10% to 80%, preferably from 30% to 60%, by weight of at least one crosslinked rubber powder, the crosslinked rubber powder having a specific surface area of between 0.08 m2/g and 100 m2/g, preferably between 0.1 and 80 m2/g, more preferentially between 0.1 and 50 m2/g, from 0 to 5%, preferably from 0.1% to 4% and notably from 1% to 2% of additives; from 0 to 40%, preferably from 5% to 20% and notably from 10% to 15% of compatibilizers.

Abstract: The present invention relates to a process for preparing lithium bis(fluorosulfonyl)imide, comprising the following steps of: contacting of bis(fluorosulfonyl)imide with a lithium base in a solvent selected from carbonates, ethers and nitriles, to obtain a mixture comprising lithium bis(fluorosulfonyl)imide and water; diafiltration of the mixture on a nanofiltration membrane so as to obtain, firstly, a concentrate enriched in lithium bis(fluorosulfonyl)imide and depleted in water and, secondly, a permeate depleted in lithium bis(fluorosulfonyl)imide and enriched in water. The present invention also relates to a process for preparing an Li-ion battery electrolyte.

Abstract: The present invention relates to a polymer powder for the manufacture of articles by 3D printing, in particular by sintering, comprising a thermoplastic polymer, antioxidants, and a particular metal oxide, metal hydroxide and/or hydrotalcite, having improved thermal stability, improved recyclability and improved consistency of mechanical properties of the sintered parts. 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: The invention relates to 3D printed parts made with thermoplastic polymers having a low stiffening temperature. 3D printed parts of the invention have very good Z layer adhesion, have a high elongation at break in the Z direction, preferably of more than 50 percent, and have at least an 80 percent ratio of Z to XY stress at yield or at break. The resulting part may be nearly isotropic—having similar mechanical properties in the XY and Z print directions. The excellent layer adhesion makes the resultant printed part more robust—able to withstand many cycles of use. Certain polymers of the invention produce printed parts that have a very low haze, and are nearly transparent.