• Patent Title: Process for producing multimodal polyethylene blends including ultra-high molecular weight components
  • Application No.: US15512186
    Application Date: 2015-12-21
  • Publication No.: US10774202B2
    Publication Date: 2020-09-15
  • Inventor: Carl-Gustaf EkThomas RatzschBernd Kretzschmar
  • Applicant: Borealis AG
  • Applicant Address: AT Vienna
  • Assignee: BOREALIS AG
  • Current Assignee: BOREALIS AG
  • Current Assignee Address: AT Vienna
  • Agency: Fay Sharpe LLP
  • Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@62c16aac
  • International Application: PCT/EP2015/002588 WO 20151221
  • International Announcement: WO2016/102062 WO 20160630
  • Main IPC: C08L23/06
  • IPC: C08L23/06 C08J3/00
Process for producing multimodal polyethylene blends including ultra-high molecular weight components
Abstract:
The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of at least partially melting a first polyethylene resin (A) having a viscosity average molecular weight My of equal to or more than 700 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 920 kg/m3 to equal to or less than 960 kg/m3 in a first homogenizing device, at least partially melting a second polyethylene resin (B) having a Mw of equal to or more than 50 kg/mol to less than 700 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 in a second homogenizing device, combining the at least partially molten first polyethylene resin (A) with the at least partially molten second polyethylene resin (B) in said second homogenizing device, compounding the combined first polyethylene resin (A) and second polyethylene resin (B) in said second homogenizing device to form a multimodal polyethylene composition, wherein the multimodal polyethylene composition has a melt flow rate MFR5 (190° C., 5 kg) of 0.01 to 10.0 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3 and a polyethylene composition obtainable by said process.
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