US 12,134,121 B2
Additive mixture for moulding material mixtures for the production of water-glass-bonded casting moulds and casting cores
Julian Bernhardt, Hannover (DE); Klaus Seeger, Hannover (DE); and Lukas Mirko Reinold, Hannover (DE)
Assigned to HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung, Düsseldorf (DE)
Appl. No. 17/619,861
Filed by HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung, Düsseldorf (DE)
PCT Filed Jun. 15, 2020, PCT No. PCT/EP2020/066428
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/254220, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 102019116406.0 (DE), filed on Jun. 17, 2019.
Prior Publication US 2022/0355366 A1, Nov. 10, 2022
Int. Cl. B33Y 70/00 (2020.01); B22C 1/18 (2006.01); B22C 9/02 (2006.01); B22C 9/10 (2006.01); C04B 14/06 (2006.01); C04B 22/16 (2006.01); C04B 28/26 (2006.01); B33Y 80/00 (2015.01); C04B 111/00 (2006.01)
CPC B22C 1/188 (2013.01) [B22C 9/02 (2013.01); B22C 9/10 (2013.01); B33Y 70/00 (2014.12); C04B 14/06 (2013.01); C04B 22/16 (2013.01); C04B 28/26 (2013.01); B33Y 80/00 (2014.12); C04B 2111/00181 (2013.01)] 14 Claims
 
1. A moulding material mixture comprising
(C) a mould base material;
and a multi-component binder system comprising
(A) an additive mixture comprising
(A-1) particulate, amorphous silicon dioxide,
(A-2) a salt M5(PO4)3OH, wherein M is an alkaline earth metal,
the additive mixture being a solids mixture or a suspension,
(B) a solution or dispersion comprising waterglass
as components spatially separate from one another; and
wherein component (A-2) is present in a concentration of 0.01% to 1%, based on the total mass of the mould base material (C).