Inorganic foundry binder systems and their uses
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United States of America Patent
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Jan 18, 1994
Grant Date -
N/A
app pub date -
Oct 30, 1991
filing date -
Oct 30, 1991
priority date (Note) -
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Abstract
This invention relates to inorganic no-bake foundry binder systems and their uses. The binder systems comprise as separate Part A and Part B components: (A) an aqueous solution of specified phosphoric acids, and (b) a mixture comprising (1) an iron oxide selected from the group consisting of (a) ferrous oxide, (b) ferroferric oxide, and (c) mixtures thereof and (2) magnesium oxide. The binder systems are used to prepare foundry mixes which are used to prepare foundry molds and cores. The foundry molds and cores are used to cast metals.
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