Process for preparing foundry cores or molds and binder material

Details Process for preparing foundry cores or molds and binder material Process for preparing foundry cores or molds and binder material

1979-11-07

1981-08-11

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

528483, C08L 6112

Patent

active

042833191

ABSTRACT:
A novel process for preparing foundry cores or molds and binder materials used therefor are provided. The binder materials comprise (a) an alcohol-soluble phenolic resin, (b) a polyvalent metal hydroxide and/or oxide, (c) water, (d) an organic solvent, and (e) an alkali metal hydroxide. They are admixed with refractory particles, such as sand, and cured with carbon dioxide to form shaped foundry cores or molds. The process and materials of the invention bring about such advantages that curing may be performed with safe carbon dioxide, that shaped foundry cores or molds may be taken out from pattern immediately after curing, and that the products have a superior collapsibility after pouring a molten metal.

REFERENCES:
patent: 3091596 (1963-05-01), Freedman et al.
patent: 3409579 (1968-11-01), Robins
patent: 3666703 (1972-05-01), Murata et al.
patent: 4051092 (1977-09-01), Houk et al.
patent: 4179427 (1979-12-01), Gardikes

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