Bentonite clay and water soluble aluminum salt compositions

Details Bentonite clay and water soluble aluminum salt compositions Bentonite clay and water soluble aluminum salt compositions

1981-10-19

1982-11-16

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 3835, 106 389, 501127, B28B 734

Patent

active

043593399

ABSTRACT:
Bentonite clay and water soluble aluminum salt compositions are provided which are useful in replacing the binding clay in foundry sand molds which has been deactivated by molten metal cast in the molds. Aluminum sulfate is the preferred aluminum salt.
The clay and aluminum salt are applied in making pumpable slurries for foundry sand make-up applications containing up to 26% by weight of clay and sufficient aluminum salt to provide a weight ratio of clay to aluminum salt of from 1/1 to 99/1. Sand mixes containing the clay and aluminum salt are also provided characterized by increased hot strengths over sand mixes containing no aluminum salt.

REFERENCES:
patent: 2237593 (1941-04-01), Dunbeck
patent: 2956893 (1960-10-01), Houston et al.
patent: 3027322 (1962-03-01), Stuchell et al.
patent: 3027323 (1962-03-01), Stuchell et al.
patent: 3445252 (1969-05-01), Nevins
patent: 4001029 (1977-01-01), Cassens
patent: 4131476 (1978-12-01), Melcher et al.
patent: 4137085 (1979-01-01), Matsui

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