Foundry sand mixes with improved bench life for curing with sulf

Details Foundry sand mixes with improved bench life for curing with sulf Foundry sand mixes with improved bench life for curing with sulf

1980-02-25

1981-12-29

Lieberman, Allan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4243, 26099818, B22C 122, B22C 902, C08K 332, C08L 7106

Patent

active

043081916

ABSTRACT:
Foundry sand mixes comprising a mixture of sand, binder, and hydrogen peroxide are improved with respect to bench life by the addition thereto, at the time of initial preparation of the mixture, of non-catalyzing amounts, but stabilizing amounts, of certain iron chelating agents which are acid or salts of acids selected from those which, in their free acid form, have an acidic pH less than 3.0 when dissolved at 1 percent weight per weight in water or when saturated in water, whichever is lower in concentration.

REFERENCES:
patent: 3681287 (1972-08-01), Brown et al.
patent: 3879339 (1975-04-01), Richard

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