US 12,460,078 B2
Pulverulent composition based on PAEK(s), sintering construction process and object derived therefrom
Benoît Brulé, Serquigny (FR); Nadine Decraemer, Serquigny (FR); Daniel Fröhlich, Gräfelfing (DE); Verena Galitz, Krailling (DE); Sabine Tutzschky, Seefeld (DE); and Andreas Pfister, Fürth (DE)
Assigned to ARKEMA FRANCE, Colombes (FR); and EOS GMBH ELECTRO OPTICAL SYSTEMS, Krailling (DE)
Appl. No. 18/039,930
Filed by ARKEMA FRANCE, Colombes (FR); and EOS GMBH ELECTRO OPTICAL SYSTEMS, Krailling (DE)
PCT Filed Dec. 2, 2021, PCT No. PCT/EP2021/083965
§ 371(c)(1), (2) Date Jun. 1, 2023,
PCT Pub. No. WO2022/117727, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 20306506 (EP), filed on Dec. 4, 2020.
Prior Publication US 2024/0010835 A1, Jan. 11, 2024
Int. Cl. B33Y 10/00 (2015.01); B29C 64/153 (2017.01); B33Y 50/02 (2015.01); B33Y 70/00 (2020.01); C08L 71/02 (2006.01); B29K 71/00 (2006.01)
CPC C08L 71/02 (2013.01) [B29C 64/153 (2017.08); B33Y 10/00 (2014.12); B33Y 50/02 (2014.12); B33Y 70/00 (2014.12); B29K 2071/00 (2013.01)] 17 Claims
 
1. A pulverulent composition comprising a powder based on at least one polyaryl ether ketone (PAEK), said composition having at least one first endothermic peak and at least one second endothermic peak,
the at least one first endothermic peak having a peak temperature of strictly more than 280° C., and
the at least one second endothermic peak having a peak temperature within a range of 200° C. to 280° C.;
wherein the at least one first endothermic peak and the at least one second endothermic peak 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./min;
in which the enthalpy measured between 225° C. and 280° C. represents from 15% to 50% of the total enthalpy measured between 225° C. and 330° C. on said thermogram;
the powder comprising a first powder P1 and a second powder P2, the first powder P1 and the second powder P2 being based, independently or not of one another, on said at least one PAEK;
wherein the first powder P1 has the at least one first endothermic peak with the peak temperature strictly more than 280° C., and possesses no endothermic peak having a peak temperature of less than or equal to 280° C.; and
wherein the second powder P2 has the at least one second endothermic peak having a peak temperature within a range of 200° C. to 280° C.