Arkema France

Hervé Ster

Benoît Brule

Karine Loyen

Cyrille Mathieu

Jerome Pascal

Nadine Decraemer

Denis Huze

Holger Senff

Thomas Fine

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

The subject of the invention is a process for producing polyamide, copolyamide, polyolefin, copolyester amide or fluorocarbon resin powder particles on to the surface of which has been grafted at least one functionalized grafting monomer, characterized in that it comprises: a) a step of blending the polyamide or copolyamide powder particles with the functionalized grafting monomer; followed by b) a step of irradiating the powder impregnated with functionalized grafting monomer resulting from a) with photons (&#x3b3;-radiation) or electrons (&#x3b2;-radiation), with a dose ranging from 0.5 to 15 Mrad. The invention also relates to the particles grafted in this way and to the compositions containing such particles.

Grafting onto a polyamide powder by gamma-irradiation

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Serquigny, France

Hervé Ster