Arkema France

Arkema Inc.

Eos Gmbh Electro Optical Systems

Nadine Decraemer

Benoît Brule

Jerome Pascal

Jean-Jacques Flat

Andreas Pfister

Yves Deyrail

Cyrille Mathieu

Ilias Iliopoulos

Nicolas Amouroux

Bruce Clay

Denis Huze

Maho Yasuda

Verena Galitz

Hervé Ster

Sabine Tutzschky

Benoît Brulé

Daniel Fröhlich

Aude Chiquot

Lionel Jeancolas

The invention relates to a pulverulent composition comprising a powder based on at least one polyaryl ether ketone, said composition having at least a first endothermic peak and a second endothermic peak, the first endothermic peak having a peak temperature strictly greater than 280° C., and the second endothermic peak having a peak temperature equal to a value of 200° C. to 280° C.; the endothermic peaks are measured on a thermogram obtained by differential scanning calorimetry, according to the standard ISO 11357-3: 2018, on first heating, using a temperature ramp of 20° C./minute. The invention also relates to a method for the electromagnetic radiation-mediated layer-by-layer sintering construction of a three-dimensional object from the pulverulent composition, to a method for determining the minimum construction temperature to be used, and also to objects that may be manufactured via this construction process.

Pulverulent composition based on PAEK(s), sintering construction process and object derived therefrom

A method and apparatus for heat treating powders of semi-crystalline or crystallizable polymers. The apparatus includes a heating device for heating the powder to a temperature that is less than the melting temperature of a highest melting crystalline form of the powder, a vessel containing the powder that is exposed to heat produced by the heating device, and a mechanism for moving the vessel to cause the powder within the vessel to move with respect to the vessel.

Process and apparatus for heat treatment of a polymer powder

A method for producing a surface coated with a coating having an improved coalescence, the method including: providing a composition comprising from 99.6% to 99.99% by weight of at least one powder of at least one polyarylene ether ketone and 0.01 to 0.4% by weight of a hydrophilic flow agent, the hydrophilic flow agent being hydrophilic silica; depositing the composition onto a surface forming a coated surface; and baking the coated surface to form a film on the surface.

Powder composition of polyarylene ether ketone ketones allowing an excellent castability/coalescence balance suitable for laser sintering

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.

Process for densification of poly(arylene ether ketone) powders

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.

Method for producing an object by melting a polymer powder in a powder sintering device

A method for producing an object by melting a polymer powder in a powder sintering device. For example, a method for producing an object by melting a polymer powder in a powder sintering device under a laser beam, implementing a rheological analysis of the polymers, in order to determine the conditions for producing the object by melting polymer powders.

The invention concerns a composition comprising a first polyamide, a second polyamide, different from the first polyamide, and 0.1 to 5% by weight of carbonaceous nanofillers, in which: a) the first polyamide comprises a unit derived from the condensation of meta-xylylene diamine or from a mixture of meta-xylylene diamine and para-xylylene diamine with sebacic acid, said first polyamide having a melting temperature Tf; and b) the second polyamide has a melting temperature Tfhigher than or equal to Tf&#x2212;40&#xb0; C. The invention also relates to a method for producing said composition and the use thereof for producing various items.

Composition made from polyamide MXD.10

The invention relates to a composite obtained from a composition comprising: 50 (excluded) to 90% by weight of at least one polyamide; 10 to 50% by weight of polylactic acid (PLA); and 0 to 30% by weight of at least one compatibilizing agent. The invention also relates to a process for manufacturing this composite and its use.

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Beaumontel, France

Nadine Decraemer