Abstract: Provided is a method for heating or cooling a liquid or a body by means of a vapor compression circuit containing a heat transfer fluid. The vapor compression circuit element includes at least one layer that includes copolyamide of formula X/10.T/Y, where the structural variables are described herein.

Abstract: The present disclosure is directed to improved poly(arylene ether ketone) powders for use in laser sintering.

Abstract: The use of PEKK for lowering the CO2 and H2S permeability of a part intended to enter into contact with a petroleum effluent. Also, a pipe for transporting a petroleum effluent, including a layer intended to be in contact with the petroleum effluent, wherein the layer intended to be in contact with the petroleum effluent comprises PEKK and has a CO2 permeability at 130° C. of less than 10?8 cm3, for a thickness of 1 cm and a surface area of 1 cm2 and per second and bar of CO2 pressure and/or an H2S permeability at 130° C. of less than 10?8 cm3 for a thickness of 1 cm and a surface area of 1 cm2 and per second and bar of H2S pressure, the amount of CO2 and H2S being measured by GC, respectively. Lastly, a number of methods for manufacturing such a pipe.

Abstract: Process for densification of a poly(arylene ether ketone) (PAEK) powder or of a mixture of poly(arylene ether ketone) (PAEK) powders, the process being mixing the powder or the mixture of powders, in a mixer equipped with a rotary stirrer including at least one blade, for a period of between 30 minutes and 120 minutes, preferably of between 30 and 60 minutes, at a blade-tip speed of between 30 m/s and 70 m/s, preferably of between 40 and 50 m/s.

Abstract: A composition including: between 45 and 94.95 wt. % of a matrix having at least one polyamide; between 0.05 and 20 wt. % of at least one prepolymer, the proportion by weight of the polyamide matrix and that of the prepolymer being respectively between 60 and 99.9 wt. % and between 40 and 0.1 wt. % in relation to the total amount of polyamide-prepolymer; between 5 and 45 wt. % of at least one impact modifier; and between 0 and 20% of an additive, said composition having a higher level of fluidity in the melted state than the same composition without prepolymer.

Abstract: The present invention relates to a polymer composition comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and styrene monomers. In particular, the present invention relates to a polymer composition comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and styrene monomers, said composition having particularly advantageous compromises of heat-resistant, fluidity, scratch-resistant and chemical-resistant properties. The present invention also relates to a molded or extruded object comprising a polymer comprising methyl methacrylate, (meth)acrylic acid and of styrene monomers, and the use of these objects.

Abstract: The present invention relates to transparent polyamide-based composition, comprising: from 5.0 to 40.0% by weight of semi-crystalline polyamide, from 20.0 to 80.0% by weight of at least one amorphous, transparent and at least partially cycloaliphatic polyamide, from 0.0 to 5.0% by weight of PEBA, from 0.0 to 5.0% by weight of additives, and from 5.0 to 50.0%, preferably from 10.0 to 40.0% by weight, preferably from 20.0 to 30.0% by weight by weight of glass filler, where the glass filler, expressed as % by weight with respect to the total weight of filler, less than 60 wt. % silica (SiO2) and more than 5 wt. % of boron oxide (B2O3). The invention also relates to the manufacture of said composition, its use for the manufacture of transparent articles, said transparent articles and their process of manufacture.

Abstract: The present invention relates to a reinforced thermoplastic powder composition, comprising: at least one polyamide powder with a d50 of less than 100 ?m, from 5% to 70% by weight of at least one glass fiber: with a 150 within the range from 50 to 200 ?m, with an lmax of less than 450 ?m, with a d50 within the range from 4 to 40 ?m, with a form factor F: 150/d50 of between 5 and 15, and from 0.05% to 5% of a pulverulent flow agent with a d50 of less than 20 ?m; with regard to the total weight of the composition. The present invention relates in particular to the use of said composition in 3D printing processes for manufacturing reinforced three-dimensional objects.

Abstract: The invention relates to the use of at least one impact modifier having a refractive index IR1 in a polyamide matrix consisting of a mixture of amorphous polyamide and semicrystalline polyamide, said matrix having a refractive index IR2, the difference in absolute value of IR1-IR2 not exceeding 0.006, to produce a transparent composition having a fatigue strength, under the fatigue test referred to as notched “Ross-Flex”, greater than 50 000 at ?10° C.

Abstract: Provided is a method for heating or cooling a liquid or a body by means of a vapor compression circuit containing a heat transfer fluid. The vapor compression circuit element includes at least one layer that includes copolyamide of formula X/10.T/Y, where the structural variables are described herein.

Abstract: A part including polyetherketoneketone, in which the polyetherketoneketone is at least partially crystalline and in which at least 50% by weight of the crystalline polyetherketoneketone is of form 1. Also a process for the manufacture of such a part, the process including the provision of polyetherketoneketone; the shaping of the polyetherketoneketone and the at least partial crystallization of the polyetherketoneketone in the form 1.

Abstract: The present disclosure is directed to improved poly(arylene ether ketone) powders for use in laser sintering.

Abstract: A tubular structure for transporting heat transfer fluid including at least: i) a layer (1) in contact with the fluid including at least one thermoplastic polymer P1 that is semicrystalline with Tm1 greater than or equal to 160° C., as determined according to the standard 1 1357-3 (2013) or amorphous with Tgl greater than or equal to 100° C., as determined according to the standard 1 1357-2 (2013), said layer (1) containing no fibers, ii) a layer (2) including at least: (a) a thermoplastic polymer P2 that is semicrystalline, in particular a polyamide with Tm2 greater than or equal to 170° C. or amorphous with Tg2 greater than or equal to 100° C., or a polyolefin with Tm greater than 100° C.; (b) optional continuous fibers, the polymer P2 being identical to P1 or different from P1 in which case the polymers P1 and P2 adhere at least partially to one another.

Abstract: The invention relates to the use of a layer consisting of a composition comprising a copolyamide of formula X/10.T/Y for transporting a heat transfer fluid in a vapor compression circuit, wherein: X represents either the residues of an aliphatic amino acid comprising between 8 and 18 carbon atoms, or a lactam, or the unit X1.X2 representing the residues resulting from the condensation of an aliphatic diamine comprising between 6 and 18 carbon atoms and a (cyclo)aliphatic diacid comprising between 6 and 18 carbon atoms; 10.T represents the residues resulting from the condensation of a decanediamine and terephthalic acid; and Y represents the residues resulting from the condensation of an aliphatic diamine comprising between 9 and 14 carbon atoms and an aromatic diacid, Y being different from the unit 10.T; the molar proportion of 10.T units being higher than 0%.

Abstract: A wear and friction article, including on at least one of the surfaces thereof a polymeric material comprising: 20 to 100% by weight of at least one polyetherketoneketone (PEKK); 0 to 80% by weight of one or more fillers; and 0 to 20% by weight of one or more additives. Also, the use of such a polymeric material for reducing wear and/or friction at elevated temperature.

Abstract: A tubular structure for transporting heat transfer fluid including at least: i) a layer (1) in contact with the fluid including at least one thermoplastic polymer P1 that is semicrystalline with Tm1 greater than or equal to 160° C., as determined according to the standard 1 1357-3 (2013) or amorphous with Tg1 greater than or equal to 100° C., as determined according to the standard 1 1357-2 (2013), said layer (1) containing no fibers, ii) a layer (2) including at least: (a) a thermoplastic polymer P2 that is semicrystalline, in particular a polyamide with Tm2 greater than or equal to 170° C. or amorphous with Tg2 greater than or equal to 100° C., or a polyolefin with Tm greater than 100° C.; (b) continuous fibers, the polymer P2 being identical to P1 or different from P1 in which case the polymers P1 and P2 adhere at least partially to one another.

Abstract: A graft copolymer comprising: a core polymer comprising a crosslinked or non-crosslinked polysaccharide, a plurality of primary graft polymers covalently grafted to the core polymer, a plurality of secondary graft polymers covalently grafted to each primary graft polymer, an injectable dermal aesthetic formulation comprising such a graft copolymer and a method of preparing such a graft copolymer.

Abstract: One subject of the present invention is a composition that combines at least one polyamide having at least one MXD entity, MXD denoting meta-xylylenediamine or a mixture of meta-xylylenediamine and of para-xylylenediamine, with a bioresourced reinforcement. The invention also relates to the conversion of these compositions, by injection moulding or extrusion, into objects that have good mechanical properties, said objects corresponding to technical application specifications such as may be found, for example, in the automotive industry, construction, sport and in electrical or electronic fields.

Abstract: Provided is a composition suitable for a process of building a three-dimensional object layer-by-layer by electromagnetic radiation-generated sintering, including at least one poly(aryl-ether-ketone) (PAEK), where the composition has an aromatic ether content of from 0 and 0.4% by mass, based on the total mass of the composition, and an aluminium mass content of lower than 1000 ppm. The composition may be used in process for building an object comprising sintering the composition with electromagnetic radiation. The present invention also includes a three-dimensional object obtained by such a process. A process for preparing the composition is also provided.

Abstract: A graft copolymer comprising: a core polymer comprising a crosslinked or non-crosslinked polysaccharide, a plurality of primary graft polymers covalently grafted to the core polymer, a plurality of secondary graft polymers covalently grafted to each primary graft polymer, an injectable dermal aesthetic formulation comprising such a graft copolymer and a method of preparing such a graft copolymer.