Acid-curable fluoride-containing no-bake foundry resins

Details Acid-curable fluoride-containing no-bake foundry resins Acid-curable fluoride-containing no-bake foundry resins

1976-09-23

1985-01-22

Pertilla, Theodore E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523144, 523145, 524379, 524389, 524405, 524428, 524541, 524596, 524612, 525501, C08L 6110, C08K 316

Patent

active

044953160

ABSTRACT:
A suspension or solution containing an acid-curable fluoride-containing resin which is useful in a foundry process is disclosed. The fluoride-containing resin is curable at room temperatures and above by the addition of a strong acid catalyst. The resin is preferably a phenolic resole resin or a furan-type resin. The fluoride-containing resins, when used in a foundry process are preferably admixed with a foundry sand and a strong acid catalyst. The coated sand is then shaped into the form of a foundry core and is allowed to cure at room temperature or above to a foundry core having excellent tensile strength.

REFERENCES:
patent: 3525379 (1970-08-01), Johnson
patent: 3549584 (1970-12-01), Sekera
patent: 3639654 (1972-02-01), Robins
patent: 3644274 (1972-02-01), Maurukas
patent: 3755229 (1973-08-01), Johnson
patent: 4028271 (1977-06-01), Schaidle et al.

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