Compositions: coating or plastic – Coating or plastic compositions – Alkali metal silicate containing
Patent
1994-03-25
1995-12-12
Bell, Mark L.
Compositions: coating or plastic
Coating or plastic compositions
Alkali metal silicate containing
106600, 106634, 106 383, 106 389, 264319, 264239, 264299, C04B 1204, B28B 700
Patent
active
054746060
ABSTRACT:
This invention relates to heat curable foundry binder systems comprising as separate components (a) a caustic solution of an alkali silicate and (b) hydrated aluminum silicate. The solution is mixed with sand to form a foundry mix. The resulting foundry mix is shaped and heated at an elevated temperature to form a cured foundry shape. Heat is applied by warm air, baking in an oven, microwave, or preferably from hot-box equipment.
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J. Davidovits, Geopolymers, Inorganic Polymeric New Materials, Journal of Thermal Analysis, vol. 37 (1991) 1633-1656.
Langer Heimo J.
Twardowska Helena J.
Ashland Inc.
Bell Mark L.
Hedden David L.
Marcheschi Michael
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