Coated sand and method for producing

Details Coated sand and method for producing Coated sand and method for producing

1982-11-02

1984-08-28

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523145, 524394, 524396, 524397, 524398, 524399, 524400, C08K 336

Patent

active

044684860

ABSTRACT:
A resin coated sand for shell-molding processes is provided comprising the coating of foundry sand or aggregates with a phenolic resin and a carboxylic acid salt. The carboxylic acid salt is selected from a carboxylic acid salt of an element selected from groups Ia, Ib, IIa, IIb, IIIa, IVa, Va, VIb, VIIa, VIIb or VIII of the Periodic Table of Elements. The proportion of carboxylic acid salt to phenolic resin is from 0.5 to 40 parts carboxylic acid salt to 100 parts phenolic resin. This resin coated sand produces shell-molds having excellent properties for casting, and allows the molded article to be removed in an easy and efficient manner.

REFERENCES:
patent: 2943068 (1960-06-01), Freedman
patent: 4196114 (1980-04-01), Funabiki et al.
patent: 4216133 (1980-08-01), Johnson et al.
patent: 4252700 (1981-02-01), Funabiki et al.

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