Arkema France

Jean-Charles Durand

Benoît Brule

Jean-Jacques Flat

Jean-Yves Loze

Ornella Zovi

Quentin P Pineau

Marc Audenaert

Karine Huraux

Emilie-A Delattre

Alexis Morfin

Masako Akagi

A copolyamide-based powder intended for forming a coating on a surface, having an inherent viscosity of greater than or equal to 0.8 (g/100 g), in which the copolyamide has a melting point of less than or equal to 160° C. Also, the use of such a powder for coating a surface, the coating having an inherent viscosity of greater than or equal to 0.8 (g/100 g), and also a process for coating a surface using such a powder.

Low-melting copolyamide powders

The invention relates to a composition for the layer-by-layer building of a three-dimensional article by sintering of the composition brought about by electromagnetic radiation, the composition comprising a semicrystalline thermoplastic polymer powder and at least one wax, the wax having a dropping point which is greater than the crystallization temperature of the semicrystalline thermoplastic polymer, said composition in addition optionally comprising a flow agent. The invention also relates to a process for the preparation of said composition and also to its use for the layer-by-layer building of a three-dimensional article.

Thermoplastic polymer composition for constructing 3D articles

The present invention relates to a reinforced thermoplastic powder composition, comprising: The present invention relates in particular to the use of said composition in 3D printing processes for manufacturing reinforced three-dimensional objects.

Thermoplastic powder composition and reinforced three-dimensional object produced by 3D printing of such a composition

The present invention relates to a self-adhesive powder composition comprising:

Self-adhesive composition for coating metal surfaces

The present invention relates to a coating composition in the form of a loose powder including the following by weight: 50% to 99.99% of polyamide powder, and 0.01% to 0.5% of polypropylene glycol, out of the total weight of the composition. The present invention relates in particular to a coating composition in the form of a powder including the following by weight: 50% to 99.9% of polyamide powder, 0.01% to 10% of at least one pigment and 0.01% to 0.5% of polypropylene glycol, out of the total weight of the composition. The present invention relates in particular to the use of said composition in methods for coating objects, in particular metal, by means of stuccoing.

Polyamide powder and method for coating an object by melting said powder

The invention provides a self-adhesive composition in powder form for the coating of metallic substrates, composed of homopolyamide (A) selected from PA11 and PA12, copolyamide (B), calcium carbonate and, optionally, at least one component selected from a pigment or dye, an anti-crater agent or spreading agent, a reductant, an antioxidant, a reinforcing filler, a UV stabilizer, a fluidizing agent and a corrosion inhibitor, said composition being devoid of silane-type adhesion promoter or of an adhesion promoter containing an epoxy, alcohol and/or carboxylic acid function, or derivatives thereof, and having a dry-state modulus and/or a wet-state modulus of greater than or equal to 2200 MPa [Standard NF EN ISO 527]. The invention also relates to a composite material comprising a metallic substrate directly coated with a coating film resulting from the melting of said composition, the adhesion of the coating film to the metallic substrate being greater than 3 after 2000 hours of salt fog before and after drying, in accordance with Standard NFT 58-112.

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Evreux, France

Jean-Charles Durand