PROPYLENE POLYMERS FOR THREE-DIMENSIONAL PRINTING
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Jul 11, 2024
filing date -
Jul 11, 2024
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Abstract
A propylene copolymer composition includes a propylene copolymer of propylene from 70 to 95 wt % and at least two α-olefin comonomers from 3.0 to 25 wt %. The α-olefin comonomer with a lower molar mass may be included from 0.3 to 10 wt %. The propylene copolymer composition may have a melt flow rate (MFR) in a range from 5.4 to 250 g/10 min, a polydispersity index (PI) in a range from 1.0 to 3.7, and an analytical temperature rising elution fractionation full width at half maximum (ATREF FWHM) in a range from 1.0 to 15.4° C. The method includes reacting propylene and at least two α-olefin comonomers in one or more vertically-stirred gas phase reactors, extruding with additives, and optionally visbreaking to produce a propylene copolymer composition.
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