Abstract: The invention pertains to a method for manufacturing a three-dimensional object with an additive manufacturing system, such as an extrusion-based additive manufacturing system, a selective laser sintering system, and/or an electrophotography-based additive manufacturing system, comprising providing a support material comprising more than 50% wt. of a semi-crystalline polyamide [polyamide (A)] having a melting point, as determined according to ASTM D3418, of at least 250° C. and possessing a water absorption at saturation, by immersion in water at 23° C., of at least 2% wt.

Abstract: The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) the provision of providing a powdered polymer material (M) comprising at least one polymer (P1) having a melting temperature (Tm) greater than 270° C., as measured by differential scanning calorimetry (DSC) according to ASTM D3418, and at least one polymer (P2) having a glass transition temperature (Tg) between 130° C. and 240° C., and no melting peak, as measured by differential scanning calorimetry (DSC) according to ASTM D3418, b) the deposition of successive layers of the powdered polymer material; and c) the selective sintering of each layer prior to the deposition of the subsequent layer, wherein the powdered polymer material (M) is heated before step c) to a temperature Tp (° C.): Tp<Tg+25, wherein Tg (° C.) is the glass transition temperature of the P2 polymer.

Abstract: The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) the provision of providing a powdered polymer material (M) comprising at least one poly(ether ether ketone) (PEEK) polymer, and at least one poly(aryl ether sulfone) (PAES) polymer, b) the deposition of successive layers of the powdered polymer material; and c) the selective sintering of each layer prior to the deposition of the subsequent layer, wherein the powdered polymer material (M) is heated before step c) to a temperature Tp (° C.): Tp<Tg+40, wherein Tg (° C.) is the glass transition temperature of the PAES polymer, as measured by differential scanning calorimetry (DSC) according to ASTM D3418.

Abstract: The present invention relates to a method for the manufacture of a poly(aryl ether) such as a poly(aryl ethersulfone) or a poly(aryl ether ketone) including the use of an organic base having a pKa of at least 10.

Abstract: The invention relates to a process for producing aromatic polyimides, comprising the following steps: (a) preparation of one or more solid salt(s) by reacting one or more aromatic tetracarboxylic acid(s) and one or more diamine(s) according to a mole ratio ranging from 0.95 to 1.05; (b) drying of the solid salt(s), (c) addition, to the dry salt resulting from step (b), of one or more compound(s) (C) comprising one or more group(s) chosen from a carboxylic acid group, an anhydride group, an ester group and an acyl chloride group; (d) solid-state polymerization of said solid salt(s) in the presence of the compound(s) (C).

Abstract: The invention pertains to a method for manufacturing a three-dimensional object with an additive manufacturing system comprising providing a support material comprising more than 50% wt. of a well-chosen polyamide. The polyamide can be a semi-crystalline polyamide having a melting point (Tm), as determined according to ASTM D3418, of from 100° C. up to less than 250° C., which, when immersed in water at a concentration of 250 g/l, is soluble in water, is dispersed in water or is swollen by water with a water uptake at saturation of at least 25% by weight, based on the initial weight of the polyamide. An exemplary polyamide is the condensation product of adipic acid with a diamine commercialized by Huntsmann Chemicals as Jeffamine® EDR-148.

Abstract: Described herein are polyamide polymer blends including a sulfonated polyamide polymer, an aromatic polyamide polymer and a reinforcing filler. Optionally, the polyamide polymer blend includes an additive. It was surprisingly discovered that blends including a sulfonated polyamide polymer in addition to an aromatic polyamide polymer had increased mechanical performance, relative to corresponding polyamide polymer blends having a non-sulfonated polyamide polymer. Furthermore, it was also surprisingly discovered that, when the sulfonated polyamide polymer included a sodium counter-ion, the mechanical performance of the polyamide polymer blend was further enhanced, relative to corresponding polyamide polymer blends having a sulfonated polyamide polymer including a lithium counter-ion in place of a sodium counter-ion.

Abstract: The invention relates to a thermoplastic composition having improved fluidity in the molten state, comprising at least: (a) a polyamide that has a melt viscosity greater than or equal to 50 Pa·s, and (b) a non-evolutive polyamide having a melt viscosity lower than the melt viscosity of said polyamide (a), above 0.8 Pa·s, and having a number-average molecular weight Mn lower than that of said polyamide (a), said composition having a melt viscosity that is stabilized at a value below the melt viscosity of said polyamide (a), said polyamide (b) having: a concentration of amine end groups (AEG) and/or of carboxyl end groups (CEG) less than or equal to 20 meq/kg, or a concentration of amine end groups (AEG) greater than or equal to 25 meq/kg; a concentration of acid end groups (CEG) greater than or equal to 25 meq/kg; and a concentration of blocked end groups (BEG) greater than or equal to 25 meq/kg.

Abstract: Disclosed is a polymer composition including a poly(ether ether ketone) (PEEK), a poly(aryl ether sulfone) (PAES) having a number average molecular weight (Mn)?10,000 g/mol, and optionally a reinforcing filler, methods of making the polymer composition, shaped articles including the polymer composition, and methods of making the shaped articles.

Abstract: An article may include a polyamide composition comprising at least one modified polyamide produced by polymerizing polyamide precursors in a polymerization reactor to form a polyamide and adding, before, during, or at the end of polymerization, a polyhydric alcohol comprising at least three hydroxyl groups to the precursors and/or polyamide in the polymerization reactor.

Abstract: A polymer composition includes components selected from: (i) at least one a poly(aryl ether ketone) (PAEK), (ii) a poly(ether sulfone) (PES), (iii) a reactive poly(ether sulfone) (rPES), (iv) a reactive poly(aryl ether ketone) (rPAEK), (v) an acid component, and (vi) at least one alkali metal carbonate. Preferably, the polymer composition is free or substantially free of solvent. A method includes melt mixing the components of the polymer composition.

Abstract: The invention relates to a process for preparing polymeric particles, based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the aromatic polymer (P) with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to polymeric particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.

Abstract: The present invention relates to copolyamides comprising 3-(aminomethyl)benzoic acid (3-AMBa). The present invention also relates to polymer compositions comprising such copolyamides, as well as articles comprising the same and methods of using said articles in automotive applications, LED packaging, mobile electronics, plumbing and oil and gas applications.

Abstract: A process for preparing particles of polyphenylene sulfide polymer (PPS), based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the PPS with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to PPS particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.

Abstract: The present invention relates to the use of a polyhydric alcohol in a polyamide polymerization process for giving the modified polyamide obtained increased stability toward heat, light and/or bad weather. The invention also relates to a polyamide modified in this way, and also to polyamide compositions that may be used for the preparation of specific articles liable to be subjected to high temperatures.

Abstract: A salt composition includes at least one ammonium carboxylate salt obtained from: (a) at least one aromatic compound comprising 2 anhydride functional groups and/or its carboxylic acid and/or ester derivatives; and (b) one or more aliphatic diamines in which said aliphatic diamine or diamines are chosen from the diamines of formula (I) NH2—R—NH2 with R being a saturated aliphatic divalent hydrocarbon radical, the two amine functional groups of which are separated by 4 to 6 carbon atoms and 1 or 2 hydrogen atoms of the divalent radical of which are replaced by 1 or 2 methyl and/or ethyl groups; and optionally the diamines of formula (II) NH2—R?—NH2 with R? being a saturated or unsaturated and aliphatic, cycloaliphatic or arylaliphatic divalent hydrocarbon radical, which optionally comprises heteroatoms; and at least one chain-limiting compound chosen from monoamines, monoacids or diacids in the ?,? positions.

Abstract: The present invention relates to polymers and blends of polymers comprising anthracene moieties able to undergo a cycloaddition reaction under certain stimuli, thereby forming polymer adducts endowed with improved or additional properties with respect to those of the starting polymers.

Abstract: The present disclosure relates to method for manufacturing three-dimensional (3D) objects using an additive manufacturing system wherein the part material comprises a combination of at least one poly(aryl ether ketone) polymer (PAEK) and at least one poly(aryl ether sulfone) (PAES). In particular, the present disclosure relates to part material incorporating PAEK and PAES, for example in the form of filaments or spherical particles, for use in additive manufacturing systems to print 3D objects.

Abstract: The present invention relates to a process for treating the surface of a polymer article with a UV-stabilizer solution which comprises an effective amount of a UV-absorber compound dissolved in a solvent, and optionally a radical scavenger. The present invention also relates to a process for preparing a UV-stabilized polymer article which comprises a step consisting in contacting the surface layer of a polymer article with the UV stabilizer solution. The present invention also provides UV-stabilized polymer articles, that-is-to-say polymer articles which are resistant to color change upon exposure to UV light.

Abstract: The present invention relates to a polymer composition (C) comprising: —a polyphenylene sulfide (PPS), —at least 3 wt. % of polyamide 6 (PA6), —25 to 60 wt. % of reinforcing agents, —3 to 8 wt. % of a functionalized, non-aromatic elastomer, wherein the weight ratio PPS/PA6 is at least 4 and wherein wt. % are based on the total weight of the composition. The present invention also relates to articles incorporating the polymer composition and the use of polyamide 6 (PA6) as a heat-aging stabilizer in a polymer composition.