US 12,134,122 B2
Inorganic binder system
Vincent Haanappel, Hengelo (NL); and Thomas Linke, Wedemark (DE)
Assigned to FOSECO INTERNATIONAL LIMITED, Derbyshire (GB)
Appl. No. 18/577,215
Filed by FOSECO INTERNATIONAL LIMITED, Barlborough Links (GB)
PCT Filed Jul. 12, 2022, PCT No. PCT/EP2022/069506
§ 371(c)(1), (2) Date Jan. 5, 2024,
PCT Pub. No. WO2023/285482, PCT Pub. Date Jan. 19, 2023.
Claims priority of application No. 21184981 (EP), filed on Jul. 12, 2021.
Prior Publication US 2024/0253107 A1, Aug. 1, 2024
Int. Cl. B22C 1/18 (2006.01); B22D 19/00 (2006.01)
CPC B22C 1/188 (2013.01) [B22C 1/181 (2013.01); B22D 19/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A composition for making a core for use in a metal casting process, the composition comprising:
a particulate refractory material;
0.5 wt % to 5 wt % of an inorganic binder comprising one or more of sodium silicate, potassium silicate, lithium silicate, or a combination thereof;
0.1 wt % to 2 wt % of a pozzolanic additive, comprising one or more of silica fume, fused silica, pyrogenic silica, and micro-silica; and
0.1 to 1.5 wt % of a lustrous carbon former,
wherein said weight percentages are relative to the weight of the particulate refractory material.