US 11,920,008 B2
Polymer composition for selective sintering methods
Wolfgang Diekmann, Waltrop (DE); Maik Grebe, Bochum (DE); Franz-Erich Baumann, Duelmen (DE); Wolfgang Christoph, Marl (DE); Sylvia Monsheimer, Haltern am See (DE); and Beatrice Küting, Marl (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Filed by Evonik Operations GmbH, Essen (DE)
Filed on Oct. 26, 2021, as Appl. No. 17/510,697.
Application 17/510,697 is a continuation of application No. 15/781,168, granted, now 11,186,688, previously published as PCT/EP2016/080993, filed on Dec. 14, 2016.
Claims priority of application No. 102015016131.8 (DE), filed on Dec. 14, 2015.
Prior Publication US 2022/0098372 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 3/14 (2006.01); B29C 64/153 (2017.01); B33Y 70/00 (2020.01); C08F 6/12 (2006.01); C08J 9/24 (2006.01); C08L 77/02 (2006.01); C08L 77/06 (2006.01)
CPC C08J 3/14 (2013.01) [B29C 64/153 (2017.08); B33Y 70/00 (2014.12); C08L 77/02 (2013.01); C08L 77/06 (2013.01); C08F 6/12 (2013.01); C08J 9/24 (2013.01); C08J 2201/0502 (2013.01); C08J 2201/0522 (2013.01); C08J 2205/042 (2013.01); C08J 2377/00 (2013.01); C08J 2377/02 (2013.01); C08J 2377/06 (2013.01)] 16 Claims
 
1. A process for producing a polymer composition for selective absorbing sintering or selective inhibition sintering, the process comprising:
a) at least partly dissolving a polymer in a solvent at a temperature of 10 K to 60 K above a dissolution temperature of the polymer, and then
b) reducing the temperature down to a precipitation temperature to obtain the polymer composition in the form of a suspension;
wherein the polymer composition comprises open mesopores, and wherein a cumulative pore volume distribution of the mesopores, measured according to DIN 66134, is 0.01 to 0.15 cm3/g and
said polymer is at least one selected from the group consisting of a polyaryl ether ketone, a polyester, a polyvinyl chloride, a polyacetal, a polypropylene, a polyethylene, a polystyrene, a polycarbonate, a polymethylmethacrylimide, a polymethylmethacrylate and a polyamide.