| 摘要 |
PCT No. PCT/GB93/02598 Sec. 371 Date Aug. 16, 1995 Sec. 102(e) Date Aug. 16, 1995 PCT Filed Dec. 20, 1993 PCT Pub. No. WO94/14555 PCT Pub. Date Jul. 7, 1994A water-dispersible mold for making a casting comprises a water-insoluble particulate material, such as foundry sand, a binder which includes polyphosphate chains and/or borate ions, and at least one fine particulate refractory material such as one selected from finely particulate silica, silicates and aluminosilicates. The incorporation of the fine particulate refractory results in improvements in the strength and related properties of the mold, when hot, prior to casting. |
