SAND MOLD-FORMING ADDITIVE, SAND MOLD-FORMING COMPOSITION, SAND MOLD MANUFACTURING METHOD, AND SAND MOLD
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United States of America Patent
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Issued Date -
Feb 8, 2024
app pub date -
Feb 9, 2022
filing date -
Mar 23, 2021
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A sand mold-forming additive capable of making a sand mold-forming composition having excellent forming property and a sand mold having excellent moisture resistance is provided. The sand mold-forming additive contains 0.01-2.00 parts by weight of an inorganic alkali metal compound (B) per 100 parts by weight of anionic surfactant (A). The inorganic alkali metal compound (B) is at least one selected from sodium chloride and sodium sulfate. The ionic surfactant (A) is preferably at least one selected from alkyl sulfonic acid metal salts (A1), alkyl sulfuric acid metal salts (A2), and polyoxyalkylene alkyl ether sulfuric acid ester metal salts (A3).
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