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US 10,647,792 B2Granted
Preparation of ultra high molecular weight polyethylene
AssigneeDsm IP Assets B.V.
InventorsJohn Richard Severn, Romain Berthoud, Timothy James Kidd
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Abstract
Particulate ultra high molecular weight polyethylene (pUHMWPE) are disclosed having an intrinsic viscosity (IV) of at least 4 dl/g, a molecular weight distribution Mw/Mn of less than 4.0, a median particle size D50 of between 50 and 200 μm, a residual Ti-content of less than 10 ppm, a residual Si-content of less than 50 ppm, and a total ash content of less than 1000 ppm.
Claims11
A particulate ultra high molecular weight polyethylene (pUHMWPE) having:
- an apparent bulk density of at least 300 kg/m3,
- an intrinsic viscosity (IV) of at least 4 dl/g to at most 50 dl/g,
- a molecular weight distribution Mw/Mn of less than 4.0,
- a median particle size D50 of between 50 and 200 μm,
- a residual Ti-content of less than 10 ppm,
- a residual Si-content of less than 50 ppm, and
- a total ash content of less than 1000 ppm.
4 more elements
Dependencies are inferred from the claim text.