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PROCESS FOR THE SYNTHESIS OF DISENTANGLED UHMW-PE USING A CR OR TI CATALYST

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Abstract

The invention pertains to a process for the manufacture of disentangled ultra-high molecular weight polyethylene in the presence of a co-catalyst comprising trialkylaluminum and a catalyst which is a substituted monocyclopentadienyl, monoindenyl, monofluorenyl or heterocyclopentadienyl complex of chromium or titanium in which at least one of the substituents on the cyclopentadienyl ring carries a neutral donor function which is bonded rigidly, not exclusively via sp3-hybridized carbon or silicon atoms, characterized in that the process comprises the following steps in the given order: i) a solvent and a trialkylaluminum-scavenger and optionally co-catalyst are added to a reaction vessel, ii) ethylene is added to the reaction vessel, iii) a mixture of the catalyst and co-catalyst is added to the reaction vessel. UHMW-PE obtainable by this process is also claimed, as are fibers, films tapes and moldings comprising this material, and their use in penetration-resistant articles, gloves, biaxial films, cables, slings, ropes, nets, pipes and prostheses.

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Details

Original languageEnglish
Patent numberWO2014060252
IPCC08F 4/ 69 A I
Priority date16/10/12
Publication statusPublished - 24 Apr 2014