Producing semi-crystalline pulverulent polycarbonate and use thereof in additive manufacturing
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United States of America Patent
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Oct 22, 2024
Grant Date -
Jul 13, 2023
app pub date -
Mar 3, 2020
filing date -
Mar 3, 2020
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Abstract
Ways of preparing a partially crystalline polycarbonate powder are provided that include dissolving an amorphous polycarbonate in a polar aprotic solvent to form a first solution of solubilized polycarbonate at a first temperature. The first solution is then cooled to a second temperature, the second temperature being lower than the first temperature, where a portion of the solubilized polycarbonate precipitates from the first solution to form a second solution including the partially crystalline polycarbonate powder. Certain partially crystalline polycarbonate powders resulting from such methods are particularly useful in additive manufacturing processes, including powder bed fusion processes.
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