Process for making foundry sand mold

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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523139, B22C 122

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active

051698803

ABSTRACT:
A foundry sand mold is produced by molding a granular refractory material with the use of (1) a binder comprising a silane coupling agent, a water-soluble phenolic resin and a silane compound selected from an alkyl silicate having 1 to 8 carbon atoms in the alkyl group, its lower condensate, a silicone oil and a modified silicone oil and (2) a hardening agent comprising an organic ester.

REFERENCES:
patent: Re32720 (1988-07-01), Lemon et al.
patent: 4076685 (1978-02-01), Kogler
patent: 4097443 (1978-06-01), Nakamura et al.
patent: 4988745 (1991-01-01), Iyer et al.
patent: 5021539 (1991-06-01), Armbruster et al.

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