High permeability metal casting plaster and method of making...

Details High permeability metal casting plaster and method of making... High permeability metal casting plaster and method of making...

C - Chemistry, Metallurgy

04

B

C04B 11/30 (2006.01) B28B 7/34 (2006.01) B28B 7/36 (2006.01) C04B 11/00 (2006.01) C04B 28/14 (2006.01)

Patent

CA 2070382

2070382 9206049 PCTABS00011 A high permeability metal casting plaster is used for production of high accuracy simulated castings for prototypes and any other plastermold castings. Methods are provided that create the high permeability metal casting plaster and mold. Also, a high permeability metal casting plaster is disclosed that uses control ground and screened alpha-hemihydrate gypsum, control ground and screened beta-hemihydrate gypsum, sucrose for protection against thermal shock, and a foaming agent.

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