US 11,674,013 B2
Composition for use in additive manufacturing processes
Monika Gessler, Munich (DE); Stefan Paternoster, Andechs (DE); and Daniel Froehlich, Graefelfing (DE)
Assigned to EOS GmbH Electro Optical Systems, Krailling (DE)
Appl. No. 16/756,273
Filed by EOS GmbH Electro Optical Systems, Krailling (DE)
PCT Filed Oct. 12, 2018, PCT No. PCT/EP2018/077932
§ 371(c)(1), (2) Date Apr. 15, 2020,
PCT Pub. No. WO2019/076767, PCT Pub. Date Apr. 25, 2019.
Claims priority of application No. 10 2017 124 047.0 (DE), filed on Oct. 16, 2017.
Prior Publication US 2020/0317885 A1, Oct. 8, 2020
Int. Cl. C08K 9/06 (2006.01); C08K 3/36 (2006.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B29C 64/135 (2017.01); C08K 5/56 (2006.01); B29K 75/00 (2006.01); B29K 101/12 (2006.01); B29K 105/00 (2006.01)
CPC C08K 3/36 (2013.01) [B29C 64/135 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C08K 5/56 (2013.01); C08K 9/06 (2013.01); B29K 2075/00 (2013.01); B29K 2101/12 (2013.01); B29K 2105/0008 (2013.01)] 15 Claims
 
1. A composition comprising:
at least one polymer system; and
at least two anti-agglomeration agents,
wherein the polymer system is selected from at least one member from the group consisting of at least one thermoplastic polymer, the thermoplastic polymer being selected from polyetherimide, polycarbonate, polyphenylene sulfone, polyphenylene oxide, polyether sulfone, acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylate copolymer (ASA), polyvinyl chloride, polyacrylate, polyester, polyamide, polyaryl ether ketone, polyether, polyurethane, polyimide, polyamide imide and polyolefin;
wherein the bulk density of the composition being at least 300 g/l, and/or the bulk density is up to about 550 g/l;
wherein a first anti-agglomeration agent comprises silicon dioxide, and wherein particles of the first anti-agglomeration agent are modified with at least one hydrophobizing agent based on at least one organosilane;
wherein a second anti-agglomeration agent comprises silicon dioxide, and wherein particles of the second anti-agglomeration agent are modified with at least one hydrophobizing agent based on at least one organosilane, and
the proportion by weight of the at least two anti-agglomeration agents is in total at most about 1%, and the first and second anti-agglomeration agents are further functionalized with amino, amide, and/or quaternary ammonium end groups.