Foundry moulding materials

Details Foundry moulding materials Foundry moulding materials

1976-06-14

1977-04-26

Woodberry, Edward M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106 385R, C08L 302

Patent

active

040200272

ABSTRACT:
A composition for making foundry moulds and cores of improved strength comprises a mixture of a granular refractory material, a sodium silicate binder and a polymeric resin material. The polymeric resin material is formed by heating together phenol, a carbohydrate and formaldehyde in the presence of a catalyst.

REFERENCES:
patent: 1857690 (1932-05-01), Mellanoff
patent: 1959433 (1934-05-01), Loetscher
patent: 2926098 (1960-02-01), Ilenda et al.
patent: 3360492 (1967-12-01), Tsou

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