INVESTMENT CASTING COMPOSITIONS
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United States of America Patent
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Issued Date -
Jun 13, 2019
app pub date -
Dec 10, 2018
filing date -
Dec 11, 2017
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Abstract
A composition which comprises a soluble or partially soluble phosphate, a refractory material and less than 1% of an oxide or hydroxide of magnesium or calcium. The composition may be mixed with water to form an investment casting slurry into which a wax pattern may be dipped. Slurry coated onto the pattern may be set by applying a stucco composition which comprises an oxide or hydroxide of magnesium or calcium. Coats of set slurry may be built up on the pattern to form an investment casting shell.
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