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(11) | EP 1 930 095 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Casting compositions for manufacturing metal casting and methods of manufacturing thereof |
| (57) Disclosed herein is a method comprising disposing a casting composition within a
sacrificial die; wherein internal features of the sacrificial die provide a replica
of a desired casting; wherein the casting composition has a viscosity of about 1 to
about 1,000 Pascal-seconds at room temperature when tested at a shear rate of up to
70 seconds-1; reacting the casting composition to form a gel matrix; removing the sacrificial
die; extracting a solvent from the gel matrix to form a dried gel; and firing the
dried gel to form a ceramic core. Disclosed herein too is a casting composition comprising
a monomer and/or a polymer; and a metal and/or ceramic powder; wherein the casting
composition has a viscosity of about 1 to about 1,000 Pascal-seconds at room temperature
when tested at a shear rate of up to 70 seconds and a flow index of less than 0.6.
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