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US 10,118,998 B2Granted
Process for producing high molecular weight polyethylene
AssigneeDsm IP Assets B.V.
InventorsHarold Jan Smelt, Pieter Gijsman, Martin Van Duin
Life of this patent
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Abstract
Processes for producing an (ultra) high molecular weight polyethylene (HMWPE) article include incorporating into the HMWPE resin a Hindered Amine Light Stabilizer (HALS) and cross-linking the (U)HMWPE during or after molding the (U)HMWPE resin.
Claims21
A process for making a cross-linked article from (ultra) high molecular weight polyethylene ((U)HMWPE) comprising steps of:
- (i) forming a composition by incorporating at least one Hindered Amine Light Stabilizer (HALS) compound in a (U)HMWPE resin, wherein the (U)HMWPE is a substantially linear ethylene homopolymer or copolymer with a molecular weight distribution (Mw/Mn) of between 2 and 18;
- (ii) adding an initiator to the composition;
- and
- (iii) molding the composition to form an article having a cross-link density of 0.09 mol/dm3 or more.
1 more element
Dependencies are inferred from the claim text.